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Artykuły w czasopismach na temat „Interstellar molecules”

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Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

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1

Oladimeji, Enock Oluwole, Emmanuel E. Etim, Emmanuel Chukwuebuka Umeh, et al. "Exploring the Thermodynamic Characteristics of Isoelectronic Diatomic Interstellar Molecular Species: Oxygen and Sulfur Containing Specie." UMYU Scientifica 3, no. 2 (2024): 146–58. http://dx.doi.org/10.56919/usci.2432.016.

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Study’s Excerpt/Novelty This study provides a comprehensive computational analysis of the thermodynamic properties of isoelectronic diatomic interstellar molecular species containing oxygen and sulfur atoms, spanning a wide range of interstellar temperatures. By investigating entropy, free energy, heat capacity, and internal energy, the research reveals unique trends, such as the earlier responsiveness of sulfur-containing molecules to temperature changes and the significant impact of molecular size on thermodynamic properties. These insights into the isoelectronic effects and thermodynamic be
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2

Winnewisser, G., and E. Herbst. "Interstellar molecules." Reports on Progress in Physics 56, no. 10 (1993): 1209–73. http://dx.doi.org/10.1088/0034-4885/56/10/001.

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3

Lequeux, J., and E. Roueff. "Interstellar molecules." Physics Reports 200, no. 5 (1991): 241–99. http://dx.doi.org/10.1016/0370-1573(91)90010-j.

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4

Kerridge, J. F. "Interstellar Molecules in Meteorites." Symposium - International Astronomical Union 135 (1989): 383–88. http://dx.doi.org/10.1017/s0074180900125392.

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Substantial enrichment of deuterium, D, in certain components of chondritic meteorites is interpreted as a record of isotopic fractionation during ion-molecule reactions at the very low temperatures characteristic of dense interstellar clouds. Whether those meteorites still contain the actual molecules that were synthesised in the presolar interstellar medium, or whether the interstellar material was recycled into a later generation of molecules within the early solar system is not known.
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5

Kuan, Y. J., H. C. Huang, S. B. Charnley, et al. "Prebiologically Important Interstellar Molecules." Symposium - International Astronomical Union 213 (2004): 185–88. http://dx.doi.org/10.1017/s0074180900193246.

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Understanding the organic chemistry of molecular clouds, particularly the formation of biologically important molecules, is fundamental to the study of the processes which lead to the origin, evolution and distribution of life in the Galaxy. Determining the level of molecular complexity attainable in the clouds, and the nature of the complex organic material available to protostellar disks and the planetary systems that form from them, requires an understanding of the possible chemical pathways and is therefore a central question in astrochemistry. We have thus searched for prebiologically imp
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6

Kaźmierczak, Maja, Mirosław Schmidt, and Jacek Krełowski. "Dicarbon molecule in the interstellar clouds." Proceedings of the International Astronomical Union 4, S251 (2008): 45–46. http://dx.doi.org/10.1017/s1743921308021145.

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AbstractWe present high-resolution and high signal-to-noise spectroscopic observations of interstellar molecular lines of C2 towards early-type stars. C2 is particularly interesting because it is the simplest multicarbon molecule and its abundances give information on the chemistry of interstellar clouds, especially on the pathway of formation of (hydro)carbon chains and PAHs which may be considered as possible carriers of diffuse interstellar bands (DIBs). Homonuclear diatomic molecules have negligible dipol moments and hence radiative cooling of excited rotational levels may go only trough t
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7

Ziurys, L. M., and B. E. Turner. "New Interstellar Molecular Detections: Implications for “Shock Chemistry”." Symposium - International Astronomical Union 120 (1987): 289–92. http://dx.doi.org/10.1017/s0074180900154166.

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Several new interstellar species have recently been detected in the molecular gas, including rotationally-excited CH, vibrationally-excited HCN, and a new molecular ion, HCNH+. These detections have raised some interesting questions concerning the relative importance of “shock” or “high temperature” chemistry vs. ion-molecule reactions in the synthesis of interstellar molecules in dense clouds.
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8

Menten, Karl M. "Interstellar methanol masers." Symposium - International Astronomical Union 206 (2002): 125–26. http://dx.doi.org/10.1017/s0074180900222213.

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The asymmetric rotor molecule methanol (CH3OH) has hundreds of transitions at centimeter-, millimeter-, and submillimeter wavelengths. Many of these are excited in the hot (T ≳ 150 K), dense (n ≳ 106 cm−3) molecular cloud cores surrounding newly formed massive stars or protostars. The high temperatures in these cores cause evaporation of icy grain mantles, releasing copious amounts of complex molecules, such as methanol, in the gas phase, which in hot cores has abundances (up to 10−6 relative to H2) that are two or more orders of magnitude higher than in cold dark clouds.
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9

Aiello, S., B. Barsella, C. Cecchi-Pestellini, F. Mencaraglia, and A. Rosolia. "Molecular Life-Time against Photodissociation in Dark Interstellar Clouds." Symposium - International Astronomical Union 120 (1987): 75–76. http://dx.doi.org/10.1017/s0074180900153811.

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Molecules in the interstellar space are exposed to interstellar radiation, so that they are destroyed by photodissociation processes, leading to the production of smaller molecules and ions, which in turn can react with other molecular species. Therefore, dissociation rates and dissociation products are important for the chemistry of interstellar molecules. This holds true also for relatively opaque and dense clouds (τ ≲ 10 in the visual), due to the multiple scattering of UV radiation by dust.
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10

Thaddeus, P. "The prebiotic molecules observed in the interstellar gas." Philosophical Transactions of the Royal Society B: Biological Sciences 361, no. 1474 (2006): 1681–87. http://dx.doi.org/10.1098/rstb.2006.1897.

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Over 130 molecules have been identified in the interstellar gas and circumstellar shells, the largest among them is a carbon chain with 13 atoms and molecular weight of 147 (twice that of the simplest amino acid glycine). The high reliability of astronomical identifications, as well as the fairly accurate quantitative analysis which can often be achieved, is emphasized. Glycine itself has been claimed, but a recent analysis indicates that few, if any, of the astronomical radio lines attributed to glycine are actually from that molecule. Polycyclic aromatic hydrocarbons (PAHs) have long been pr
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11

Jose, Jeeno, Alon Zamir, and Tamar Stein. "Molecular dynamics reveals formation path of benzonitrile and other molecules in conditions relevant to the interstellar medium." Proceedings of the National Academy of Sciences 118, no. 19 (2021): e2101371118. http://dx.doi.org/10.1073/pnas.2101371118.

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Polycyclic aromatic hydrocarbons and polycyclic aromatic nitrogen heterocycles are believed to be widespread in different areas of the interstellar medium. However, the astronomical detection of specific aromatic molecules is extremely challenging. As a result, only a few aromatic molecules have been identified, and very little is known about how they are formed in different areas of the interstellar medium. Recently, McGuire et al. [Science 359, 202–205 (2018)] detected the simple aromatic molecule benzonitrile in Taurus Molecular Cloud-1. Although benzonitrile has been observed, the molecula
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12

Mcgonagle, Douglas, William Irvine, and Young Minh. "Nitrogen Sulfide (NS) in Star Forming Regions." Symposium - International Astronomical Union 150 (1992): 227–30. http://dx.doi.org/10.1017/s0074180900090070.

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Gas phase models of ion molecule chemistry have been rather successful in matching the observed abundances of small interstellar molecules containing carbon, hydrogen, and oxygen. However, the situation is somewhat less clear for nitrogen-containing species, partly because the important initiating reaction N+ + H2 is slightly endothermic; and for sulfur-containing molecules, where it remains uncertain whether it is necessary to invoke surface reactions on grains to match the observed abundances. As a relatively simple species, the abundance of nitrogen sulfide should provide a good test of the
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13

Irvine, William M. "Microwave Spectroscopy of Astrophysical Molecules." Highlights of Astronomy 8 (1989): 339–44. http://dx.doi.org/10.1017/s1539299600007966.

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ABSTRACTRecent detections of new molecules in dense interstellar clouds, first detections of certain chemical elements in interstellar molecules, and new information on isotopic fractionation of hydrogen in the interstellar medium are discussed in the context of the need for new laboratory data on transition rest frequencies, reaction rates, and branching ratios.
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14

Winnewisser, Gisbert. "Interstellar Molecules of Prebiotic Interest." International Astronomical Union Colloquium 161 (January 1997): 5–22. http://dx.doi.org/10.1017/s0252921100014573.

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AbstractThe field of interstellar molecules is reviewed with special consideration of molecules which are of potential biological interest. At present more than 110 interstellar molecules have been identified in interstellar clouds and circumstellar envelopes. The more complex molecules are found in the dense cores which are often the sites of active star formation. These locations represent prime targets for the search of larger molecules such as glycine and possibly other amino acids. However, in the list of detected interstellar molecules still many simple hydrides are missing, e.g. SH, PH,
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15

Saito, Shuji. "Laboratory Microwave Spectroscopy of Interstellar Molecules." Symposium - International Astronomical Union 115 (1987): 92. http://dx.doi.org/10.1017/s0074180900095085.

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One of the main difficulties to identify molecular species in space has been raised by the lack of reliable spectroscopic data for various molecules, especially for chemically active free radicals and molecular ions. Some of the free radicals and molecular ions have been fundamental to the study of chemistry in space but they are too active under terrestrial conditions and are hardly produced in concentrations enough for laboratory observations. We have developed a millimeter-wave spectrometer of high sensitivity suitable for observations of transient molecules. It covers the frequency region
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16

Min, Y. C. "ASTROCHEMISTRY AND INTERSTELLAR MOLECULES." Publications of The Korean Astronomical Society 25, no. 1 (2010): 1–13. http://dx.doi.org/10.5303/pkas.2010.25.1.001.

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17

Smith, Keith T. "Molecules in interstellar space." Science 363, no. 6428 (2019): 704.7–705. http://dx.doi.org/10.1126/science.363.6428.704-g.

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18

Herbst, Eric, and Ewine F. van Dishoeck. "Complex Organic Interstellar Molecules." Annual Review of Astronomy and Astrophysics 47, no. 1 (2009): 427–80. http://dx.doi.org/10.1146/annurev-astro-082708-101654.

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19

Candian, Alessandra, and Cameron J. Mackie. "Anharmonic interstellar PAH molecules." International Journal of Quantum Chemistry 117, no. 2 (2016): 146–50. http://dx.doi.org/10.1002/qua.25292.

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20

Abplanalp, Matthew J., Samer Gozem, Anna I. Krylov, Christopher N. Shingledecker, Eric Herbst, and Ralf I. Kaiser. "A study of interstellar aldehydes and enols as tracers of a cosmic ray-driven nonequilibrium synthesis of complex organic molecules." Proceedings of the National Academy of Sciences 113, no. 28 (2016): 7727–32. http://dx.doi.org/10.1073/pnas.1604426113.

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Complex organic molecules such as sugars and amides are ubiquitous in star- and planet-forming regions, but their formation mechanisms have remained largely elusive until now. Here we show in a combined experimental, computational, and astrochemical modeling study that interstellar aldehydes and enols like acetaldehyde (CH3CHO) and vinyl alcohol (C2H3OH) act as key tracers of a cosmic-ray-driven nonequilibrium chemistry leading to complex organics even deep within low-temperature interstellar ices at 10 K. Our findings challenge conventional wisdom and define a hitherto poorly characterized re
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21

Schmidt, Timothy W., and Robert G. Sharp. "The Optical Spectroscopy of Extraterrestrial Molecules." Australian Journal of Chemistry 58, no. 2 (2005): 69. http://dx.doi.org/10.1071/ch04269.

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The ongoing quest to identify molecules in the interstellar medium by their electronic spectra in the visible region is reviewed. Identification of molecular absorption is described in the context of the elucidation of the carriers of the unidentified Diffuse Interstellar Bands, and molecular emission is discussed with reference to the unidentified Red Rectangle bands. The experimental techniques employed in undertaking studies on the optical spectroscopy of extraterrestrial molecules are described and critiqued in the context of their application.
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22

Williams, David A. "Chemical Effects of Interstellar Grains." Highlights of Astronomy 8 (1989): 383–86. http://dx.doi.org/10.1017/s1539299600008029.

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ABSTRACTThe chemical effects of interstellar grains are briefly reviewed. Their dominant chemical role is to catalyze the formation of H2 which is the seminal molecule for efficient gas phase chemistry. In regions of at least moderate extinction grains accumulate molecular mantles of CO, H2O, etc. Solid state chemistry in such mantles may produce molecules of a type or in an abundance not achievable in the interstellar gas. Return of mantle material to the gas can – at least transiently – dominate gas phase chemistry. It is argued that the freeze-out of heavy atomic and molecular species on to
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23

Ohishi, Masatoshi. "Molecular spectral line surveys and the organic molecules in the interstellar molecular clouds." Proceedings of the International Astronomical Union 4, S251 (2008): 17–26. http://dx.doi.org/10.1017/s174392130802108x.

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AbstractIt is known that more than 140 interstellar and circumstellar molecules have so far been detected, mainly by means of the radio astronomy observations. Many organic molecules are also detected, including alcohols, ketons, ethers, aldehydes, and others, that are distributed from dark clouds and hot cores in the giant molecular clouds. It is believed that most of the organic molecules in space are synthesized through the grain surface reactions, and are evaporated from the grain surface when they are heated up by the UV radiation from adjacent stars.On the other hand the recent claim on
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24

Adams, Nigel G., and David Smith. "Recent Advances in the studies of Reaction Rates relevant to Interstellar Chemistry." Symposium - International Astronomical Union 120 (1987): 1–18. http://dx.doi.org/10.1017/s0074180900153707.

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The current status of laboratory measurements of the rate coefficients for ionic reactions involved in interstellar molecular synthesis is discussed and the experimental techniques used to acquire such data are briefly described. Examples are given of laboratory data which are being obtained at temperatures close to those of interstellar clouds. Particular attention is given to the results of recent theoretical and experimental work which show that the rate coefficients for the binary reactions of ions with polar molecules at low temperatures are much larger than previously assumed. It is show
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25

Kaźmierczak, M., M. Schmidt, T. Weselak, G. Galazutdinov, and J. Krełowski. "C2 and Diffuse Interstellar Bands." Proceedings of the International Astronomical Union 9, S297 (2013): 121–24. http://dx.doi.org/10.1017/s1743921313015718.

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AbstractC2, the simplest multicarbon molecule is a useful astronomical tool, because the analysis of its lines allows to determine the physical conditions in interstellar clouds. C2 abundances give information about the chemistry of interstellar clouds, especially on the pathway to the formation of long-chain carbon molecules, which may be connected with carriers of diffuse interstellar bands (Douglas 1977, Thorburn et al. 2003). Here we summarize all relations between C2 and diffuse interstellar bands (DIBs).
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26

Gerin, M., F. Levrier, E. Falgarone, et al. "Hydride spectroscopy of the diffuse interstellar medium: new clues on the gas fraction in molecular form and cosmic ray ionization rate in relation to H 3 +." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1978 (2012): 5174–85. http://dx.doi.org/10.1098/rsta.2012.0023.

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The Herschel-guaranteed time key programme PRobing InterStellar Molecules with Absorption line Studies (PRISMAS) 1 is providing a survey of the interstellar hydrides containing the elements C, O, N, F and Cl. As the building blocks of interstellar molecules, hydrides provide key information on their formation pathways. They can also be used as tracers of important physical and chemical properties of the interstellar gas that are difficult to measure otherwise. This paper presents an analysis of two sight-lines investigated by the PRISMAS project, towards the star-forming regions W49N and W51.
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27

Mitchell, George F. "Chemistry in Shocked Interstellar Gas." Symposium - International Astronomical Union 120 (1987): 275–87. http://dx.doi.org/10.1017/s0074180900154154.

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In its passage through the interstellar gas, a shock imposes massive and irreversible changes on the chemical composition of the gas. The synthesis of molecules from atoms and atomic ions can be highly efficient behind non-dissociative (i.e. slow) shocks. Results of kinetic calculations behind non-dissociative shocks are reviewed here, with emphasis given to the dependence of the postshock molecular composition on initial cloud properties. It is shown that a dense cloud shock can convert essentially all neutral atoms into various molecules. Even in diffuse and unshielded regions, a variety of
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28

Gredel, R., S. Lepp, A. Dalgarno, and E. Herbst. "Cosmic Ray Induced Photodestruction of Interstellar Molecules." International Astronomical Union Colloquium 120 (1989): 32–37. http://dx.doi.org/10.1017/s0252921100023459.

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AbstractUltraviolet photons are created in the interior of dense interstellar clouds by the impact excitation of molecular hydrogen by secondary electrons generated by cosmic ray ionization. The resulting photodissociation and photoionization rates of a wide range of interstellar molecules are calculated. The effects on the equilibrium chemical composition of dense clouds are briefly discussed.
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29

Insausti, A., E. R. Alonso, L. Kolesniková, A. Belloche, I. León, and S. Mato. "Rotational Spectrum and Search for Lactonitrile toward Sgr B2(N)." Astrophysical Journal 981, no. 1 (2025): 64. https://doi.org/10.3847/1538-4357/adad54.

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Abstract Laboratory experiments on interstellar ice analogs have demonstrated that ice mixtures containing acetaldehyde (CH3CHO) and hydrogen cyanide (HCN) in the presence of ammonia (NH3), water (H2O), or an NH3/H2O mixture allow the formation of the chiral molecule lactonitrile (2-hydroxypropionitrile; CH3CH(OH)CN). These findings place lactonitrile among possible interstellar molecules, especially when its methyl-shortened derivative glycolonitrile and the precursors are known interstellar species. To support the search for lactonitrile in interstellar space, we present measurements under s
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30

Belloche, Arnaud. "Molecular complexity in the interstellar medium." Proceedings of the International Astronomical Union 15, S350 (2019): 96–99. http://dx.doi.org/10.1017/s1743921319006380.

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AbstractThe search for complex organic molecules in the interstellar medium (ISM) has revealed species of ever greater complexity. This search relies on the progress made in the laboratory to characterize their rotational spectra. Our understanding of the processes that lead to molecular complexity in the ISM builds on numerical simulations that use chemical networks fed by laboratory and theoretical studies. The advent of ALMA and NOEMA has opened a new door to explore molecular complexity in the ISM. Their high angular resolution reduces the spectral confusion of star-forming cores and their
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31

Smith, Peter L. "Oscillator Strengths for Visible and Ultraviolet Observations of Interstellar Molecules." Symposium - International Astronomical Union 120 (1987): 95–102. http://dx.doi.org/10.1017/s0074180900153872.

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The accuracy of the information obtained from observations of optical-wavelength, molecular absorption features in interstellar clouds is directly limited by the accuracy of the rotational-line oscillator strengths used in the analysis of data. This paper briefly discusses optical observations of molecules in interstellar clouds; surveys molecular lifetime and oscillator strengths; and reviews laboratory techniques for obtaining these data.
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32

Shingledecker, C. N., K. L. K. Lee, J. T. Wandishin, et al. "Detection of interstellar H2CCCHC3N." Astronomy & Astrophysics 652 (August 2021): L12. http://dx.doi.org/10.1051/0004-6361/202140698.

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Context. The chemical pathways linking the small organic molecules commonly observed in molecular clouds to the large, complex, polycyclic species long suspected of being carriers of the ubiquitous unidentified infrared emission bands remain unclear. Aims. To investigate whether the formation of mono- and polycyclic molecules observed in cold cores could form via the bottom-up reaction of ubiquitous carbon-chain species with, for example, atomic hydrogen, a search is made for possible intermediates in data taken as part of the GOTHAM (GBT Observations of TMC-1: Hunting for Aromatic Molecules)
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33

Ter Meulen, J. J. "Inelastic collisions of interstellar molecules." Symposium - International Astronomical Union 178 (1997): 241–52. http://dx.doi.org/10.1017/s0074180900009396.

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The rotational energy transfer of NH3, OH and D2CO in inelastic collisions with He and H2 is studied in a crossed molecular beam experiment. The molecules are prepared in a single initial state by rotational cooling in an adiabatic expansion followed by electrostatic state selection. Relative state-to-state cross sections are determined by measuring the collision induced redistribution of the population of the initial state by using state selective laser detection techniques. The results for NH3 and OH are compared to theoretical values obtained from quantum calculations. Except for NH3 — He w
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34

Zhang, Yong. "Molecular studies of Planetary Nebulae." Proceedings of the International Astronomical Union 12, S323 (2016): 141–49. http://dx.doi.org/10.1017/s1743921317000497.

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AbstractCircumstellar envelopes (CEs) around evolved stars are an active site for the production of molecules. After evolving through the Asymptotic Giant Branch (AGB), proto-planetary nebula (PPN), to planetary nebula (PN) phases, CEs ultimately merge with the interstellar medium (ISM). The study of molecules in PNe, therefore, is essential to understanding the transition from stellar to interstellar materials. So far, over 20 molecular species have been discovered in PNe. The molecular composition of PNe is rather different from those of AGB and PPNe, suggesting that the molecules synthesize
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35

Williams, D. A. "The Role of Grains in Interstellar Chemistry." Symposium - International Astronomical Union 120 (1987): 531–38. http://dx.doi.org/10.1017/s0074180900154567.

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Grains affect interstellar chemistry in a variety of ways. Most obviously, they extinguish starlight and thus protect molecules in cloud interiors from photodestruction. The grains themselves contain substantial proportions of particular elements which are therefore less readily available for gas phase reactions and for processing into molecules. Grains in dense clouds are known to accrete molecular mantles which may be further processed; the mantle material is ultimately returned to the gas, either near hot stars or when the clouds are dissipated. Molecular hydrogen, the key to all gas phase
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36

Miksch, April M., Annalena Riffelt, Ricardo Oliveira, Johannes Kästner, and Germán Molpeceres. "Hydrogenation of small aromatic heterocycles at low temperatures." Monthly Notices of the Royal Astronomical Society 505, no. 3 (2021): 3157–64. http://dx.doi.org/10.1093/mnras/stab1514.

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ABSTRACT The recent wave of detections of interstellar aromatic molecules has sparked interest in the chemical behaviour of aromatic molecules under astrophysical conditions. In most cases, these detections have been made through chemically related molecules, called proxies, that implicitly indicate the presence of a parent molecule. In this study, we present the results of the theoretical evaluation of the hydrogenation reactions of different aromatic molecules (benzene, pyridine, pyrrole, furan, thiophene, silabenzene, and phosphorine). The viability of these reactions allows us to evaluate
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37

Wang, Jia, Chaojiang Zhang, Joshua H. Marks, and Ralf I. Kaiser. "Formation of All Three C2H4O Isomers—Ethylene Oxide (c-C2H4O), Acetaldehyde (CH3CHO), and Vinyl Alcohol (CH2CHOH)—in Ethanol-containing Interstellar Analog Ices." Astrophysical Journal 984, no. 2 (2025): 138. https://doi.org/10.3847/1538-4357/adc308.

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Abstract Oxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen-containing cyclic molecules. Here, we present the first laboratory simulation experiments featuring the formation of all three C2H4O isomers—ethylene oxide (c–C2H4O), acetaldehyde (CH3CHO), and vinyl alcohol (CH2CHOH)—in low-temperature model interstellar ices composed of carbon monoxide (CO) and ethanol (C2H5OH). Ice mixtures were exposed to
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38

Suzuki, H., M. Ohishi, M. Morimoto, et al. "Recent Observations of Organic Molecules in Nearby Cold, Dark Interstellar Clouds." Symposium - International Astronomical Union 112 (1985): 139–44. http://dx.doi.org/10.1017/s0074180900146443.

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We report recent investigations of the organic chemistry of relatively nearby cold, dark interstellar clouds. Specifically, we confirm the presence of interstellar tricarbon monoxide (C3O) in Taurus Molecular Cloud1 (TMC-1); report the first detection in such regions of acetaldehyde (CH3CHO), the most complex oxygen-containing organic molecule yet found in dark clouds; report the first astronomical detection of several molecular rotational transitions, including the J=18−17 and 14−13 transitions of cyanodiacetylene (HC5N), the 101−000 transition of acetaldehyde, and the J=5−4 transition of C3O
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39

Snyder, Lewis E. "Cometary Molecules." Symposium - International Astronomical Union 150 (1992): 427–34. http://dx.doi.org/10.1017/s0074180900090598.

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40

Ehrenfreund, Pascale. "Composition of Comets and Interstellar Dust." Highlights of Astronomy 12 (2002): 229–32. http://dx.doi.org/10.1017/s1539299600013332.

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AbstractRecent observational results from ground and space-based observatories in combination with laboratory simulations allow us to monitor the evolution, survival, transport and transformation of cosmic dust from molecular clouds and the diffuse interstellar medium, until their incorporation into Solar System material. The composition of comets encodes information on their origin and can be used as a tracer for processes which were predominant in the protosolar nebula. A comparison of the composition and abundances of interstellar molecules and cometary volatiles reveals a general correspon
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Szczepanski, J., and M. Vala. "Vibrational spectroscopy of interstellar molecules." European Physical Journal Special Topics 144, no. 1 (2007): 27–40. http://dx.doi.org/10.1140/epjst/e2007-00106-y.

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Tielens, A. G. G. M. "Interstellar Polycyclic Aromatic Hydrocarbon Molecules." Annual Review of Astronomy and Astrophysics 46, no. 1 (2008): 289–337. http://dx.doi.org/10.1146/annurev.astro.46.060407.145211.

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Snow, Theodore P. "Ultraviolet Observations of Interstellar Molecules." Proceedings of the International Astronomical Union 1, S231 (2006): 175. http://dx.doi.org/10.1017/s1743921306007174.

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Furuya, Kenji. "Isotopic fractionation in interstellar molecules." Proceedings of the International Astronomical Union 13, S332 (2017): 163–74. http://dx.doi.org/10.1017/s1743921317006810.

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AbstractThe level of isotopic fractionation in molecules provides insights into their formation environments and how they formed. In this article, we review hydrogen and nitrogen isotopic fractionation in low-mass star-forming regions. Interstellar molecules are significantly enriched in deuterium. The importance of the nuclear spin states of light species on deuterium fractionation and the usefulness of singly and doubly deuterated molecules as chemical tracers are discussed. Observations have revealed that molecules in prestellar cores are enriched in or depleted in15N depending on molecules
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Wootten, Alwyn. "Deuterated Molecules in Interstellar Clouds." Symposium - International Astronomical Union 120 (1987): 311–19. http://dx.doi.org/10.1017/s0074180900154221.

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We show that deuteration in DCN and HDCO probably derives from CH2D+ in warm clouds, and that the levels of deuteration observed in those clouds require that radiative association play an important role in the chemistry of interstellar clouds.
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Brown, Ronald D. "Prebiotic Matter in Interstellar Molecules." Symposium - International Astronomical Union 112 (1985): 123–37. http://dx.doi.org/10.1017/s0074180900146431.

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With the discovery of the first polyatomic molecules, NH3, H2O and H2CO in 1968/9 there was immediate speculation as to how far biological chemical evolution - from atoms to small carbon compounds of biological significance - could have occurred in the Galaxy. There was also potential conflict with the canonical scientific view of the origin of life, traceable to the production of simple bio-molecules from the influence of energetic atmospheric events on the simple gaseous mixture (CH4, H2, H2O and NH3) presumed to compose the atmosphere of the very young Earth.
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Hjalmarson, Åke. "Organic molecules in interstellar space." Acta Astronautica 14 (January 1986): 267–75. http://dx.doi.org/10.1016/0094-5765(86)90128-1.

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Kurtadikar, Mukund L., and Suresh C. Mehrotra. "Collisional excitation of interstellar molecules." Astrophysics and Space Science 197, no. 1 (1992): 3–15. http://dx.doi.org/10.1007/bf00645068.

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Hu, Xiaoyi, Yuanyuan Yang, Congcong Zhang, Yang Chen, Junfeng Zhen, and Liping Qin. "Gas-phase laboratory formation of large, astronomically relevant PAH-organic molecule clusters." Astronomy & Astrophysics 656 (December 2021): A80. http://dx.doi.org/10.1051/0004-6361/202141407.

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Polycyclic aromatic hydrocarbon (PAH) molecules may play an essential role in the prebiotic compound evolution network in interstellar clouds. In this work, an experimental study of large, astronomically relevant PAH-organic molecule clusters is presented. With the initial molecular precursors dicoronylene (DC; C48H20)-pyroglutamic acid (Pga, C5H7NO3), DC-proline (Pro; C5H9NO2), and DC-pyroglutaminol (Pgn; C5H9NO2), our experiments indicate that PAH–organic molecule cluster cations (e.g., (Pga)(1−2)C48Hn+, (Pro)(1−2)C48Hn+, and (Pgn)(1−6)C48Hn+) and carbon cluster–organic molecule cluster cati
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Omont, Alain. "Chemical Properties of Interstellar Polycyclic Aromatic Molecules." Symposium - International Astronomical Union 120 (1987): 545–46. http://dx.doi.org/10.1017/s0074180900154580.

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There is substantial evidence of the presence of polycyclic aromatic molecules, mainly hydrocarbons (PAH's) in the interstellar medium (Léger and Puget, 1984, Allamandola et al. 1985, Léger and d'Hendecourt in these proceedings). They should contain typically NC = 20–100 carbon atoms, and they can contain perhaps 1–10% of the total interstellar carbon. I have recently discussed in detail their physical and chemical properties (Omont, 1986), which should be intermediate between that of conventional interstellar molecules and grains.
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