Relevant bibliographies by topics / Astrochemistry, star formation, complex organic molecules

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Astrochemistry, star formation, complex organic molecules'

Author: Grafiati
Published: 10 March 2023

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Journal articles on the topic "Astrochemistry, star formation, complex organic molecules"

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Jørgensen, Jes K., Arnaud Belloche, and Robin T. Garrod. "Astrochemistry During the Formation of Stars." Annual Review of Astronomy and Astrophysics 58, no. 1 (2020): 727–78. http://dx.doi.org/10.1146/annurev-astro-032620-021927.

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Star-forming regions show a rich and varied chemistry, including the presence of complex organic molecules—in both the cold gas distributed on large scales and the hot regions close to young stars where protoplanetary disks arise. Recent advances in observational techniques have opened new possibilities for studying this chemistry. In particular, the Atacama Large Millimeter/submillimeter Array has made it possible to study astrochemistry down to Solar System–size scales while also revealing molecules of increasing variety and complexity. In this review, we discuss recent observations of the c
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Qin, Sheng-Li, Tie Liu, Xunchuan Liu, et al. "ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions – VIII. A search for hot cores by using C2H5CN, CH3OCHO, and CH3OH lines." Monthly Notices of the Royal Astronomical Society 511, no. 3 (2022): 3463–76. http://dx.doi.org/10.1093/mnras/stac219.

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ABSTRACT Hot cores characterized by rich lines of complex organic molecules are considered as ideal sites for investigating the physical and chemical environments of massive star formation. We present a search for hot cores by using typical nitrogen- and oxygen-bearing complex organic molecules (C2H5CN, CH3OCHO, and CH3OH), based on ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS). The angular resolutions and line sensitivities of the ALMA observations are better than 2 arcsec and 10 mJy beam−1, respectively. A total of 60 hot cores are identified with 45 being newly
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Jørgensen, Jes K. "The ALMA-PILS Survey: New insights into the complex chemistry of young stars." Proceedings of the International Astronomical Union 14, S345 (2018): 132–36. http://dx.doi.org/10.1017/s1743921319002849.

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AbstractUnderstanding how, when and where complex organic and potentially prebiotic molecules are formed is a fundamental goal of astrochemistry. Since its beginning the Atacama Large Millimeter/submillimeter Array (ALMA) has demonstrated its capabilities for studies of the chemistry of solar-type stars. Its high sensitivity and fine spectral and angular resolution makes it possible to study the chemistry of young stars on Solar System scales. We here present an unbiased spectral survey, Protostellar Interferometric Line Survey (PILS), of the astrochemical template source and Class 0 protostel
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Yang, Yao-Lun, Joel D. Green, Klaus M. Pontoppidan, et al. "CORINOS. I. JWST/MIRI Spectroscopy and Imaging of a Class 0 Protostar IRAS 15398–3359." Astrophysical Journal Letters 941, no. 1 (2022): L13. http://dx.doi.org/10.3847/2041-8213/aca289.

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Abstract The origin of complex organic molecules (COMs) in young Class 0 protostars has been one of the major questions in astrochemistry and star formation. While COMs are thought to form on icy dust grains via gas-grain chemistry, observational constraints on their formation pathways have been limited to gas-phase detection. Sensitive mid-infrared spectroscopy with JWST enables unprecedented investigation of COM formation by measuring their ice absorption features. Mid-infrared emission from disks and outflows provide complementary constraints on the protostellar systems. We present an overv
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Ioppolo, S., B. A. McGuire, M. A. Allodi, and G. A. Blake. "THz and mid-IR spectroscopy of interstellar ice analogs: methyl and carboxylic acid groups." Faraday Discuss. 168 (2014): 461–84. http://dx.doi.org/10.1039/c3fd00154g.

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A fundamental problem in astrochemistry concerns the synthesis and survival of complex organic molecules (COMs) throughout the process of star and planet formation. While it is generally accepted that most complex molecules and prebiotic species form in the solid phase on icy grain particles, a complete understanding of the formation pathways is still largely lacking. To take full advantage of the enormous number of available THz observations (e.g.,Herschel Space Observatory, SOFIA, and ALMA), laboratory analogs must be studied systematically. Here, we present the THz (0.3–7.5 THz; 10–250 cm<s
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Mininni, C., M. T. Beltrán, V. M. Rivilla, et al. "The GUAPOS project: G31.41+0.31 Unbiased ALMA sPectral Observational Survey." Astronomy & Astrophysics 644 (December 2020): A84. http://dx.doi.org/10.1051/0004-6361/202038966.

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Context. One of the goals of astrochemistry is to understand the degree of chemical complexity that can be reached in star-forming regions, along with the identification of precursors of the building blocks of life in the interstellar medium. To answer such questions, unbiased spectral surveys with large bandwidth and high spectral resolution are needed, in particular, to resolve line blending in chemically rich sources and identify each molecule (especially for complex organic molecules). These kinds of observations have already been successfully carried out, primarily towards the Galactic Ce
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López-Sepulcre, Ana, and Mathilde Bouvier. "Molecular richness in protostars: Lessons learnt from spectral observations." EPJ Web of Conferences 265 (2022): 00026. http://dx.doi.org/10.1051/epjconf/202226500026.

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The gas associated with the early stages of star formation contains traces of a large variety of molecular species, many of which are organic in nature. Interestingly, we observe a substantial chemical diversity among protostars, with some objects being enriched in what astrochemists label interstellar complex organic molecules (iCOMs), such as methyl formate (HCOOCH3), while others are overabundant in unsaturated carbon chains such as C4H. What is the cause of this diversity? And where should we place the proto-solar-system in this chemical context: was it rich in iCOMs, or in carbon chains,
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García-Hernández, D. Anibal. "Molecular processes from the AGB to the PN stage." Proceedings of the International Astronomical Union 7, S283 (2011): 148–55. http://dx.doi.org/10.1017/s1743921312010861.

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AbstractMany complex organic molecules and inorganic solid-state compounds have been observed in the circumstellar shell of stars (both C-rich and O-rich) in the transition phase between Asymptotic Giant Branch (AGB) stars and Planetary Nebulae (PNe). This short (~102-104 years) phase of stellar evolution represents a wonderful laboratory for astrochemistry and provides severe constraints on any model of gas-phase and solid-state chemistry. One of the major challenges of present day astrophysics and astrochemistry is to understand the formation pathways of these complex organic molecules and i
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Garrod, Robin T., Susanna L. Widicus Weaver, and Eric Herbst. "Complex chemistry in star-forming regions." Proceedings of the International Astronomical Union 4, S251 (2008): 123–24. http://dx.doi.org/10.1017/s1743921308021339.

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AbstractWe present a new gas-grain chemical model that allows the grain-surface formation of saturated, complex, organic species from their constituent functional-groups–basic building blocks that derive from the cosmic ray-induced photodissociation of the granular ice mantles. The surface mobility of the funtional-group radicals is crucial to the reactions, and much of the formation of complex molecules occurs at the intermediate temperatures (~20–40 K) attained during the warm-up of the hot core. Our model traces the evolution of a large range of detected, and as yet un-detected, complex mol
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Öberg, Karin I., Trish Lauck, and Dawn Graninger. "COMPLEX ORGANIC MOLECULES DURING LOW-MASS STAR FORMATION: PILOT SURVEY RESULTS." Astrophysical Journal 788, no. 1 (2014): 68. http://dx.doi.org/10.1088/0004-637x/788/1/68.

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Dissertations / Theses on the topic "Astrochemistry, star formation, complex organic molecules"

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Al-Edhari, Ali Jaber. "Complex organic molecules in solar-type star forming regions." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY048/document.

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Le but de la présente thèse est l'étude de la compléxité moléculaire dans les régions de formation stellaires. Cette thèse s'axe sur deux classes de molécule aux caractéristiques prébiotiques : les molécules organiques complexes et les cyanopolyynes.Dans ce contexte, j'ai analysé des données d'un seul échantillon de relevés spec- traux en exploitant des codes de transfert radiatif à l'équilibre thermodynamique local (LTE) et/ou non-LTE pour deux sources : une proto-étoile de type solaire dans un environnement calme (IRAS 16293-2422) et un proto-ama constitué de proto-étoile de type solaire (OM
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BIANCHI, ELEONORA. "Tracing our chemical origins: deuteration and complex organic molecules in Sun-like protostars." Doctoral thesis, 2018. http://hdl.handle.net/2158/1120208.

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The work of this thesis is set within the general context of the overall effort to increase the observational studies of the chemical content in Solar-type protostars. Molecular deuteration and interstellar Complex Organic Molecules (iCOMs) are of great importance in the study of protostellar regions. On the one hand, deuterated species give the opportunity to recover the physical gas conditions in the pre-collapse phase. On the other hand, iCOMs constitute the smallest bricks to build up biotic matherial and they had a role in the emergence of life on Earth. Nevetheless, observations of
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Mininni, Chiara, Francesco Fontani, and Guido Risaliti. "Complex organic chemistry in high-mass star-forming regions." Doctoral thesis, 2021. http://hdl.handle.net/2158/1275292.

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Star formation is a process of crucial importance in modern astrophysics to understand the evolution of galaxies and of the Universe after the Big Bang. With the advent of radio-astronomy, we have discovered that star-forming regions in the interstellar medium (ISM), are characterized by the emission of rotational transitions of molecular species and in the last decades astronomers have identified more than 200 molecules, from simple diatomic to complex organic molecules (COMs, molecules containing carbon with 6 or more atoms). Some of these molecules have also a prebiotic importance, hence u
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Book chapters on the topic "Astrochemistry, star formation, complex organic molecules"

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"Conclusions." In Astrochemistry. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/9781839163968-00227.

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The chemical richness of the Milky Way and other galaxies can be explained by a combination of gas phase reactions together with reactions on the surfaces of dust grains and reactions in ices deposited on those grains. Molecules and dust grains play important roles within galaxies, affecting their physical evolution by driving star and planet formation and modifying the content of the interstellar medium. We show that the difficulties (expressed in Chapter 1) of creating extensive chemistry in the apparently hostile environments of the Milky Way and other galaxies can be readily overcome. Star and planet formation provide locations in which a remarkably rich range of organic molecules can form; these species include a number of amino acids that may form the building blocks of RNA and DNA. This result, confirmed by many laboratory experiments, lends support to the concept of abiogenesis – the origin of life as a consequence of reactions in non-living matter. However, the necessary intervening steps are not yet understood.
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