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Publikováno v:
Global Journal of Business Pedagogy (GJBP). 2023, Vol. 7 Issue 1, p99-105. 7p.
Star-forming galaxies constitute the majority of galaxies with stellar masses >10^10 M_Sun/h^2 at z~2 and dominate the star-formation rate density of the Universe at this early epoch. It is thus critical to understand their origins, evolution, and co
Externí odkaz:
http://arxiv.org/abs/0711.0001
Autor:
Stark, Daniel P., Ellis, Richard S., Richard, Johan, Kneib, Jean-Paul, Smith, Graham P., Santos, Michael R.
Publikováno v:
Astrophys.J.663:10-28,2007
We discuss new observational constraints on the abundance of faint high redshift Lyman-alpha emitters secured from a deep Keck near-infrared spectroscopic survey which utilizes the strong magnification provided by lensing galaxy clusters at intermedi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701279
Publikováno v:
Astrophys.J.607:697-703,2004
We discuss the observational properties of a remarkably faint triply-imaged galaxy revealed in a deep z-band ACS observation of the lensing cluster A2218. A well-constrained mass model for the cluster, which incorporates the outcome of recent Keck sp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402319
Publikováno v:
Astrophys.J.606:683-701,2004
We derive the luminosity function of high-redshift Lyman alpha emitting sources from a deep, blind, spectroscopic survey that utilized strong-lensing magnification by intermediate-redshift clusters of galaxies. We observed carefully selected regions
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310478
Autor:
Santos, Michael R.
Publikováno v:
Mon.Not.Roy.Astron.Soc.349:1137,2004
Lyman-alpha emission from high-redshift galaxies may be a powerful probe of the ionization history of the IGM at z>6: the observed Lyman-alpha emission line is sensitive to the neutral fraction of IGM hydrogen in the range 0.1-1. We present calculati
Externí odkaz:
http://arxiv.org/abs/astro-ph/0308196
A method to infer the stellar population that dominated the UV background at the end of reionization
Autor:
Santos, Michael R., Loeb, Abraham
We present an observational test of the spectrum of the ionizing background at z~5; the test is sufficiently sensitive to determine whether Pop II or Pop III stars are the dominant source of ionizing radiation. The ionizing background at z~5 may refl
Externí odkaz:
http://arxiv.org/abs/astro-ph/0304130
Publikováno v:
Mon.Not.Roy.Astron.Soc. 336 (2002) 1082
We calculate the contribution to the cosmic infrared background from very massive metal-free stars at high redshift. We explore two plausible star-formation models and two limiting cases for the reprocessing of the ionizing stellar emission. We find
Externí odkaz:
http://arxiv.org/abs/astro-ph/0111467
Publikováno v:
Journal of Applied Financial Research. 2019, Vol. 1, p34-46. 13p.