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Journal articles on the topic 'Cosmic Dawn'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Cowen, Ron. "Cosmic Dawn." Science News 161, no. 23 (2002): 362. http://dx.doi.org/10.2307/4013543.

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2

Fialkov, Anastasia. "Tracing Cosmic Dawn." Proceedings of the International Astronomical Union 12, S333 (2017): 22–25. http://dx.doi.org/10.1017/s1743921318000194.

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AbstractObservational effort is on the way to probe the 21-cm of neutral hydrogen from the epochs of Reionization and Cosmic Dawn. Our current poor knowledge of high redshift astrophysics results in a large uncertainty in the theoretically predicted 21-cm signal. A recent parameter study that is highlighted here explores the variety of 21-cm signals resulting from viable astrophysical scenarios. Model-independent relations between the shape of the signal and the underlying astrophysics are discussed. Finally, I briefly note on possible alternative probes of the high redshift Universe, specific

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3

Misner, Charles W. "Cosmic Dark Dawn." Research Notes of the AAS 7, no. 7 (2023): 142. http://dx.doi.org/10.3847/2515-5172/ace440.

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4

Cooper, Keith. "A new cosmic dawn." Physics World 35, no. 1 (2022): 28–33. http://dx.doi.org/10.1088/2058-7058/35/01/31.

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As NASA’s James Webb Space Telescope gears up to open its eyes on the universe, Keith Cooper explores the mission’s troubled past, its technological advances and the exciting future ahead for astronomy.

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5

Iliev, I. T., D. Sullivan, and K. L. Dixon. "Simulating the cosmic dawn." Astronomy & Geophysics 56, no. 3 (2015): 3.31–3.33. http://dx.doi.org/10.1093/astrogeo/atv094.

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6

Durrive, J.-B., and M. Langer. "Magnetogenesis at Cosmic Dawn." Proceedings of the International Astronomical Union 11, S308 (2014): 378–79. http://dx.doi.org/10.1017/s1743921316010206.

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AbstractWe present a mechanism for generating cosmological magnetic fields during the Epoch of Reionization, based on the photoionization of intergalactic hydrogen. A general formula is presented, together with an example numerical application which yields magnetic field strengths between 10−23 to 10−19 G on intersource scales. This mechanism, which operates all along Reionization around any ionizing source, participates to the premagnetization of the whole intergalactic medium. Also, the spatial configuration of these fields may help discriminate them from those produced by other mechanisms i

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7

Cowen, Ron. "Galaxy formation: Cosmic dawn." Nature 497, no. 7451 (2013): 554–56. http://dx.doi.org/10.1038/497554a.

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8

Paliya, Vaidehi S., M. Ajello, H. M. Cao, et al. "Blazars at the Cosmic Dawn." Astrophysical Journal 897, no. 2 (2020): 177. http://dx.doi.org/10.3847/1538-4357/ab9c1a.

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9

Clery, D. "A glimpse of cosmic dawn." Science 346, no. 6210 (2014): 688–91. http://dx.doi.org/10.1126/science.346.6210.688.

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10

Ferrara, A. "Feedback Processes at Cosmic Dawn." EAS Publications Series 24 (2007): 229–43. http://dx.doi.org/10.1051/eas:2007032.

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11

Stark, Daniel. "Searching for the cosmic dawn." Nature 489, no. 7416 (2012): 370–71. http://dx.doi.org/10.1038/489370a.

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12

Chen, Ke-Jung. "Supernovae at the cosmic dawn." International Journal of Modern Physics D 23, no. 05 (2014): 1430008. http://dx.doi.org/10.1142/s0218271814300080.

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Modern cosmological simulations predict that the first generation of stars formed with a mass scale around 100 M⊙ about 300–400 million years after the Big Bang. When the first stars reached the end of their lives, many of them might have died as energetic supernovae (SNe) that could have significantly affected the early Universe via injecting large amounts of energy and metals into the primordial intergalactic medium. In this paper, we review the current models of the first SNe by discussing on the relevant background physics, computational methods and the latest results.

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13

IYE, Masanori. "Subaru studies of the cosmic dawn." Proceedings of the Japan Academy, Series B 87, no. 9 (2011): 575–86. http://dx.doi.org/10.2183/pjab.87.575.

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14

Chapman, Emma. "Tuning in to the cosmic dawn." Nature Astronomy 3, no. 4 (2019): 298–99. http://dx.doi.org/10.1038/s41550-019-0752-9.

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15

Clery, Daniel. "Quasar at cosmic dawn challenges theorists." Science 381, no. 6660 (2023): 821. http://dx.doi.org/10.1126/science.adk4478.

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16

Katz, Harley, Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz, and Taysun Kimm. "Magnetogenesis at Cosmic Dawn: tracing the origins of cosmic magnetic fields." Monthly Notices of the Royal Astronomical Society 484, no. 2 (2019): 2620–31. http://dx.doi.org/10.1093/mnras/stz055.

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17

Greenhill, Lincoln. "A surprising chill before the cosmic dawn." Nature 555, no. 7694 (2018): 38–39. http://dx.doi.org/10.1038/d41586-018-02310-9.

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18

Fan, X. "ASTRONOMY: Black Holes at the Cosmic Dawn." Science 300, no. 5620 (2003): 752–53. http://dx.doi.org/10.1126/science.1084469.

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19

Miniati, Francesco, and A. R. Bell. "RESISTIVE MAGNETIC FIELD GENERATION AT COSMIC DAWN." Astrophysical Journal 729, no. 1 (2011): 73. http://dx.doi.org/10.1088/0004-637x/729/1/73.

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20

Mesinger, Andrei. "Reionization and Cosmic Dawn: theory and simulations." Proceedings of the International Astronomical Union 12, S333 (2017): 3–11. http://dx.doi.org/10.1017/s1743921317011139.

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AbstractWe highlight recent progress in the sophistication and diversification of the simulations of cosmic dawn and reionization. The application of these modeling tools to recent observations has allowed us narrow down the timing of reionization. The midpoint of reionization is constrained to z = 7.6−0.7+0.8 (1 σ), with the strongest constraints coming from the optical depth to the CMB measured with the Planck satellite and the first detection of ongoing reionization from the spectra of the z = 7.1 QSOs ULASJ1120+0641. However, we still know virtually nothing about the astrophysical sources

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21

Irion, R. "From Cosmic Dawn to Milkomeda, and Beyond." Science 340, no. 6129 (2013): 136–37. http://dx.doi.org/10.1126/science.340.6129.136.

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22

Durrive, J. B., and M. Langer. "Intergalactic magnetogenesis at Cosmic Dawn by photoionization." Monthly Notices of the Royal Astronomical Society 453, no. 1 (2015): 345–56. http://dx.doi.org/10.1093/mnras/stv1578.

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23

Ghara, Raghunath, T. Roy Choudhury, Kanan K. Datta, et al. "Prospects of detection of the first sources with SKA using matched filters." Proceedings of the International Astronomical Union 12, S333 (2017): 122–25. http://dx.doi.org/10.1017/s1743921318000728.

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AbstractThe matched filtering technique is an efficient method to detect H ii bubbles and absorption regions in radio interferometric observations of the redshifted 21-cm signal from the epoch of reionization and the Cosmic Dawn. Here, we present an implementation of this technique to the upcoming observations such as the SKA1-low for a blind search of absorption regions at the Cosmic Dawn. The pipeline explores four dimensional parameter space on the simulated mock visibilities using a MCMC algorithm. The framework is able to efficiently determine the positions and sizes of the absorption/H i

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24

Mirocha, Jordan, Henri Lamarre, and Adrian Liu. "Systematic uncertainties in models of the cosmic dawn." Monthly Notices of the Royal Astronomical Society 504, no. 2 (2021): 1555–64. http://dx.doi.org/10.1093/mnras/stab949.

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ABSTRACT Models of the reionization and reheating of the intergalactic medium (IGM) at redshifts z ≳ 6 continue to grow more sophisticated in anticipation of near-future 21-cm, cosmic microwave background, and galaxy survey measurements. However, there are many potential sources of systematic uncertainty in models that could bias and/or degrade upcoming constraints if left unaccounted for. In this work, we examine three commonly ignored sources of uncertainty in models for the mean reionization and thermal histories of the IGM: the underlying cosmology, halo mass function (HMF), and choice of

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25

Bi, Da, Isaac Shlosman, and Emilio Romano-Díaz. "Modeling Evolution of Galactic Bars at Cosmic Dawn." Astrophysical Journal 934, no. 1 (2022): 52. http://dx.doi.org/10.3847/1538-4357/ac779b.

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Abstract We study the evolution of galactic bars using a suite of very high-resolution zoom-in cosmological simulations of galaxies at z ∼ 9–2. Our models were chosen to lie within similar-mass dark matter (DM) halos, log(M vir/M ⊙) ∼ 11.65 ± 0.05, at z = 6, 4, and 2, in high- and low-overdensity environments. We apply two galactic wind feedback mechanisms for each model. All galaxies develop subkiloparsec stellar bars differing in their properties. We find that (1) the high-z bars form in response to various perturbations: mergers, close flybys, cold accretion inflows along the cosmological f

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26

Lopez-Honorez, Laura, Olga Mena, Sergio Palomares-Ruiz, Pablo Villanueva-Domingo, and Samuel J. Witte. "Variations in fundamental constants at the cosmic dawn." Journal of Cosmology and Astroparticle Physics 2020, no. 06 (2020): 026. http://dx.doi.org/10.1088/1475-7516/2020/06/026.

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27

Cho, Adrian. "Cosmic dawn signal holds clue to dark matter." Science 359, no. 6379 (2018): 969. http://dx.doi.org/10.1126/science.359.6379.969.

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28

Latif, Muhammad A., and Sadegh Khochfar. "Inception of a first quasar at cosmic dawn." Monthly Notices of the Royal Astronomical Society 497, no. 3 (2020): 3761–69. http://dx.doi.org/10.1093/mnras/staa2218.

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ABSTRACT Earliest quasars at the cosmic dawn are powered by mass accretion on to supermassive black holes of a billion solar masses. Massive black hole (MBH) seeds forming through the direct collapse mechanism are considered the most promising candidates but how do they grow and coevolve with their host galaxies at early cosmic times remains unknown. We here present results from a cosmological radiation hydrodynamical simulation including self-consistent modelling of both Population III (Pop III) and Population II (Pop II) star formation, their radiative and supernova feedback in the host gala

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29

Clery, Daniel. "First light machine." Science 374, no. 6569 (2021): 806–11. http://dx.doi.org/10.1126/science.acx9595.

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30

Meiksin, Avery, та Piero Madau. "The impact of Lyα emission line heating and cooling on the cosmic dawn 21-cm signal". Monthly Notices of the Royal Astronomical Society 501, № 2 (2020): 1920–32. http://dx.doi.org/10.1093/mnras/staa3830.

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ABSTRACT Allowing for enhanced Lyα photon line emission from Population III dominated stellar systems in the first forming galaxies, we show the 21-cm cosmic dawn signal at 10 &lt; $z$ &lt; 30 may substantially differ from standard scenarios. Energy transfer by Lyα photons emerging from galaxies may heat intergalactic gas if H ii regions within galaxies are recombination bound, or cool the gas faster than by adiabatic expansion if reddened by winds internal to the haloes. In some extreme cases, differential 21-cm antenna temperatures near −500 mK may be achieved at 15 &lt; $z$ &amp

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31

Mirabel, I. F. "Black hole high mass X-ray binary microquasars at cosmic dawn." Proceedings of the International Astronomical Union 14, S346 (2018): 365–79. http://dx.doi.org/10.1017/s1743921319002084.

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AbstractTheoretical models and observations suggest that primordial Stellar Black Holes (Pop-III-BHs) were prolifically formed in HMXBs, which are powerful relativistic jet sources of synchrotron radiation called Microquasars (MQs).Large populations of BH-HMXB-MQs at cosmic dawn produce a smooth synchrotron cosmic radio background (CRB) that could account for the excess amplitude of atomic hydrogen absorption at z∼17, recently reported by EDGES.BH-HMXB-MQs at cosmic dawn precede supernovae, neutron stars and dust. BH-HMXB-MQs promptly inject into the IGM hard X-rays and relativistic jets, whic

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32

Ceverino, Daniel. "FIRSTLIGHT: Cosmological simulations of first galaxies at cosmic dawn." Proceedings of the International Astronomical Union 15, S341 (2019): 245–48. http://dx.doi.org/10.1017/s1743921319002175.

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AbstractUsing the FirstLight database of 300 zoom-in cosmological simulations we provide rest-frame UV-optical spectral energy distributions of galaxies with complex star-formation histories that are coupled to the non-uniform gas accretion history of galactic halos during cosmic dawn. The population at any redshift is very diverse ranging from starbursts to quiescent galaxies even at a fixed stellar mass. The FirstLight simulations make predictions on the rest-frame UV-optical absolute magnitudes, colors and optical emission lines of galaxies at z = 6–12 that will be observed for the first ti

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33

Ceverino, Daniel. "FirstLight: Cosmological simulations of first galaxies at cosmic dawn." Proceedings of the International Astronomical Union 15, S352 (2019): 60–63. http://dx.doi.org/10.1017/s1743921319009086.

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AbstractCosmological hydrodynamical simulations have become an important theoretical tool for understanding the formation and evolution of the first galaxies during cosmic dawn, between redshifts 5 and 15. I will introduce the FirstLight database of about 300 zoom-in simulations with a resolution of 10 parsecs. This database agrees well with observed UV luminosity functions and stellar mass functions. I will discuss the origin and evolution of the star-forming main sequence of galaxies and the main drivers of the star formation histories at these early epochs. I will show simulated SEDs from U

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34

den Herder, Jan-Willem, Luigi Piro, Takaya Ohashi, et al. "ORIGIN: metal creation and evolution from the cosmic dawn." Experimental Astronomy 34, no. 2 (2011): 519–49. http://dx.doi.org/10.1007/s10686-011-9224-7.

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35

Mirabel, I. Felix. "Stellar black holes: Cosmic history and feedback at the dawn of the universe." Proceedings of the International Astronomical Union 6, S275 (2010): 3–10. http://dx.doi.org/10.1017/s1743921310015589.

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AbstractSignificant historic cosmic evolution for the formation rate of stellar black holes is inferred from current theoretical models of the evolution of massive stars, the multiple observations of compact stellar remnants in the near and distant universe, and the cosmic chemical evolution. The mean mass of stellar black holes, the fraction of black holes/neutron stars, and the fraction of black hole high mass X-ray binaries (BH-HMXBs)/solitary black holes increase with redshift. The energetic feedback from large populations of BH-HMXBs form in the first generations of star burst galaxies ha

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36

Yang, Weiqiang, Supriya Pan, Sunny Vagnozzi, Eleonora Di Valentino, David F. Mota, and Salvatore Capozziello. "Dawn of the dark: unified dark sectors and the EDGES Cosmic Dawn 21-cm signal." Journal of Cosmology and Astroparticle Physics 2019, no. 11 (2019): 044. http://dx.doi.org/10.1088/1475-7516/2019/11/044.

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37

Meiksin, Avery. "Observational Constraints on the Metagalactic Lyα Photon Scattering Rate at High Redshift". Research Notes of the AAS 7, № 4 (2023): 71. http://dx.doi.org/10.3847/2515-5172/accbc2.

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Abstract The scattering of Lyα photons from the first radiating sources in the universe plays a pivotal role in 21 cm radio detections of Cosmic Dawn and the Epoch of Reionization through the Wouthuysen–Field effect. New data from JWST show the Lyα photon scattering rate exceeds that required to decouple the intergalactic hydrogen spin temperature from that of the Cosmic Microwave Background up to z ∼ 14 and render the neutral hydrogen visible.

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38

DiLullo, Christopher, Gregory B. Taylor, and Jayce Dowell. "Using the Long Wavelength Array to Search for Cosmic Dawn." Journal of Astronomical Instrumentation 09, no. 02 (2020): 2050008. http://dx.doi.org/10.1142/s2251171720500087.

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The search for the spectral signature of hydrogen from the formation of the first stars, known as Cosmic Dawn or First Light, is an ongoing effort around the world. The signature should present itself as a decrease in the temperature of the 21[Formula: see text]cm transition relative to that of the Cosmic Microwave Background and is believed to reside somewhere below 100[Formula: see text]MHz. A potential detection was published by the Experiment to Detect the Global EoR Signal (EDGES) collaboration with a profile centered around 78[Formula: see text]MHz of both unexpected depth and width (Bow

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39

Ceverino, Daniel, Michaela Hirschmann, Ralf S. Klessen, Simon C. O. Glover, Stéphane Charlot, and Anna Feltre. "FirstLight IV: diversity in sub-L* galaxies at cosmic dawn." Monthly Notices of the Royal Astronomical Society 504, no. 3 (2021): 4472–80. http://dx.doi.org/10.1093/mnras/stab1206.

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ABSTRACT Using a large sample of sub-L* galaxies, with similar UV magnitudes, MUV ≃ −19 at z ≃ 6, extracted from the FirstLight simulations, we show the diversity of galaxies at the end of the reionization epoch. We find a factor ∼40 variation in the specific star formation rate (sSFR). This drives a ∼1 dex range in equivalent width of the [O iii]λ5007 line. Variations in nebular metallicity and ionization parameter within H ii regions lead to a scatter in the equivalent widths and [O iii]/H α line ratio at a fixed sSFR. [O iii]-bright ([O iii]/H α&gt;1) emitters have higher ionization par

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40

Salvador-Solé, Eduard, Alberto Manrique, J. Miguel Mas-Hesse та ін. "Lyα Emitting Galaxies (LAEs) at Cosmic Dawn: Implications and Predictions". Astrophysical Journal 936, № 2 (2022): 178. http://dx.doi.org/10.3847/1538-4357/ac874c.

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Abstract The detection of Lyα emitting galaxies (LAEs) puts severe constraints on the reionization history. In this paper, we derive the properties of very high-z LAEs predicted in the only two reionization scenarios shown in a previous paper to be consistent with the current data on 15 independent evolving global (or averaged) cosmic properties regarding luminous objects and the intergalactic medium and the optical depth to electron scattering of ionized hydrogen to cosmic microwave background photons: one with a monotonic behavior, which is completed by z = 6, as commonly considered, and ano

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41

Reis, Itamar, Rennan Barkana, and Anastasia Fialkov. "Mapping Discrete Galaxies at Cosmic Dawn with 21 cm Observations." Astrophysical Journal 933, no. 1 (2022): 51. http://dx.doi.org/10.3847/1538-4357/ac729d.

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Abstract At cosmic dawn, the 21 cm signal from intergalactic hydrogen was driven by Ly-α photons from some of the earliest stars, producing a spatial pattern that reflected the distribution of galaxies at that time. Due to the large foreground, it is thought that at around redshift 20 it is only observationally feasible to detect 21 cm fluctuations statistically, yielding a limited indirect probe of early galaxies. Here, we show that 21 cm images at cosmic dawn should actually be dominated by large (tens of comoving megaparsecs) high-contrast bubbles surrounding individual galaxies. We demonst

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42

Nebrin, Olof, Raghunath Ghara, and Garrelt Mellema. "Fuzzy dark matter at cosmic dawn: new 21-cm constraints." Journal of Cosmology and Astroparticle Physics 2019, no. 04 (2019): 051. http://dx.doi.org/10.1088/1475-7516/2019/04/051.

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43

Madau, Piero, and Tassos Fragos. "Radiation Backgrounds at Cosmic Dawn: X-Rays from Compact Binaries." Astrophysical Journal 840, no. 1 (2017): 39. http://dx.doi.org/10.3847/1538-4357/aa6af9.

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44

Mellema, Garrelt, Léon V. E. Koopmans, Filipe A. Abdalla, et al. "Reionization and the Cosmic Dawn with the Square Kilometre Array." Experimental Astronomy 36, no. 1-2 (2013): 235–318. http://dx.doi.org/10.1007/s10686-013-9334-5.

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45

Cohen, Aviad, Anastasia Fialkov, Rennan Barkana, and Raul A. Monsalve. "Emulating the global 21-cm signal from Cosmic Dawn and Reionization." Monthly Notices of the Royal Astronomical Society 495, no. 4 (2020): 4845–59. http://dx.doi.org/10.1093/mnras/staa1530.

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ABSTRACT The 21-cm signal of neutral hydrogen is a sensitive probe of the Epoch of Reionization (EoR), Cosmic Dawn, and the Dark Ages. Currently, operating radio telescopes have ushered in a data-driven era of 21-cm cosmology, providing the first constraints on the astrophysical properties of sources that drive this signal. However, extracting astrophysical information from the data is highly non-trivial and requires the rapid generation of theoretical templates over a wide range of astrophysical parameters. To this end emulators are often employed, with previous efforts focused on predicting

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46

Muñoz, Julian B., Yuxiang Qin, Andrei Mesinger, Steven G. Murray, Bradley Greig, and Charlotte Mason. "The impact of the first galaxies on cosmic dawn and reionization." Monthly Notices of the Royal Astronomical Society 511, no. 3 (2022): 3657–81. http://dx.doi.org/10.1093/mnras/stac185.

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ABSTRACT The formation of the first galaxies during cosmic dawn and reionization (at redshifts z = 5–30), triggered the last major phase transition of our universe, as hydrogen evolved from cold and neutral to hot and ionized. The 21-cm line of neutral hydrogen will soon allow us to map these cosmic milestones and study the galaxies that drove them. To aid in interpreting these observations, we upgrade the publicly available code 21cmFAST. We introduce a new, flexible parametrization of the additive feedback from: an inhomogeneous, H2-dissociating (Lyman–Werner; LW) background; and dark matter

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47

Trott, Cathryn M. "The Square Kilometre Array Epoch of Reionisation and Cosmic Dawn Experiment." Proceedings of the International Astronomical Union 12, S333 (2017): 92–97. http://dx.doi.org/10.1017/s1743921317010729.

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AbstractThe Square Kilometre Array (SKA) Epoch of Reionisation and Cosmic Dawn (EoR/CD) experiments aim to explore the growth of structure and production of ionising radiation in the first billion years of the Universe. Here I describe the experiments planned for the future low-frequency components of the Observatory, and work underway to define, design and execute these programs.

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48

Bernardi, Gianni. "Measurements of the global 21-cm signal from the Cosmic Dawn." Proceedings of the International Astronomical Union 12, S333 (2017): 98–101. http://dx.doi.org/10.1017/s1743921318000674.

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AbstractThe sky-averaged (global) 21-cm signal is a very promising probe of the Cosmic Dawn, when the first luminous sources were formed and started to shine in a substantially neutral intergalactic medium. I here report on the status and early result of the Large-Aperture Experiment to Detect the Dark Age that focuses on observations of the global 21-cm signal in the 16 ≲ z ≲ 30 range.

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49

Fujimoto, S., G. B. Brammer, D. Watson, et al. "A dusty compact object bridging galaxies and quasars at cosmic dawn." Nature 604, no. 7905 (2022): 261–65. http://dx.doi.org/10.1038/s41586-022-04454-1.

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50

Raste, Janakee, та Shiv Sethi. "Analytic Formulation of 21 cm Signal from Cosmic Dawn: Lyα Fluctuations". Astrophysical Journal 876, № 1 (2019): 56. http://dx.doi.org/10.3847/1538-4357/ab13a6.

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