Results 11 to 20 of about 22,853 (217)
CEMPlifying reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The massive stars that ionised the Universe have short lifetimes and can only be studied near the time of formation, but any low mass stars that formed contemporaneously might be observable in the local Universe today. We study the abundance pattern and spatial distribution of these `siblings of reionizers' (SoRs) in the EAGLE cosmological ...
Mahavir Sharma, Tom Theuns, Carlos Frenk
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The epoch of reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 We have modelled the process of reionization of the IGM by photoionization by galaxies, in order to predict the epoch of reionization. We use a sophisticated semi-analytic model to track the formation of galaxies. Our study represents a much more complete and physically consistent modelling of reionization than has been conducted in the past ...
Benson, A.J. +3 more
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Dust distribution during reionization [PDF]
Astronomy & Astrophysics, 2007 The dust produced by the first generation of stars will be a foreground to cosmic microwave background. In order to evaluate the effect of this early dust, we calculate the power spectrum of the dust emission anisotropies and compare it with the sensitivity limit of the Planck satellite.
Elfgren, E. +2 more
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The reionization of carbon [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Observations suggest that CII was more abundant than CIV in the intergalactic medium towards the end of the hydrogen reionization epoch. This transition provides a unique opportunity to study the enrichment history of intergalactic gas and the growth of the ionizing background (UVB) at early times.
Finlator, Kristian +5 more
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Characteristic scales during reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 13 pages, 9 figures, in press at ...
Furlanetto, Steven R. +2 more
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Early Reionization by Miniquasars [PDF]
The Astrophysical Journal, 2004 Motivated by the recent detection by WMAP of a large optical depth to Thomson scattering -- implying a very early reionization epoch -- we assess a scenario where the universe was reionized by `miniquasars' powered by intermediate-mass black holes (IMBHs), the remnants of the first generation of massive stars.
MADAU P. +4 more
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PAWS and POCO: NIR Astrophotonic Instruments for Astronomy
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract For near‐infrared ground and space‐based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, and sky subtraction filters, thus saving cost, reducing volume, weight, and power requirements.
Kalaga Madhav +8 more
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Cosmic Reionization on Computers: Properties of the Post-reionization IGM [PDF]
The Astrophysical Journal, 2017 Abstract We present a comparison between several observational tests of the post-reionization intergalactic medium and the numerical simulations of reionization completed under the Cosmic Reionization On Computers (CROC) project. The CROC simulations match the gap distribution reasonably well, and also provide a good match for the ...
Gnedin, Nickolay Y. +2 more
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Detector system challenges of the wide‐field spectroscopic survey telescope (WST)
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract The wide‐field spectroscopic survey telescope (WST) is proposed to become the next large optical/near infrared facility for the European southern observatory (ESO) once the extremely large telescope (ELT) has become operational. While the latter is optimized for unprecedented sensitivity and adaptive‐optics assisted image quality over a small ...
Roland Bacon +4 more
wiley +1 more source
Cosmological reionization [PDF]
AIP Conference Proceedings, 2001 The universe was reionized by redshift z ~ 6 by a small fraction of the baryons in the universe, which released energy following their condensation out of a cold, dark, and neutral IGM into the earliest galaxies. The theory of this reionization is a critical missing link in the theory of galaxy formation.
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