Results 11 to 20 of about 6,029 (310)
Galaxy Formation and Chemical Evolution [PDF]
International Journal of Astronomy and Astrophysics, 2014 14 pages, 5 ...
S. Sahijpal
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Formation and Evolution of Disk Galaxies [PDF]
Symposium - International Astronomical Union, 1999 We have developed a semianalitical approach to study galaxy formation and evolution in the cosmological context. Disk galaxies (dark matter halo+luminous disk) are considered to be formed through an extended process of gravitational collapse, whose character is determined by the statistical properties of the density fluctuation field assumed here to be
C. Firmani, V. Ávila-Reese
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The formation and evolution of field massive galaxies [PDF]
Astrophysics and Space Science, 2003 The problem of the formation and evolution of field massive galaxies is briefly reviewed from an observational perspective. The motivations and the characteristics of the K20 survey are outlined. The redshift distribution of Ks<20 galaxies, the evolution of the rest-frame Ks-band luminosity function and luminosity density to z=1.5, the nature and ...
A. Cimatti
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Galaxy Formation and Evolution since z = 1 [PDF]
, 2006 Determination of the star formation rate can be done using mid-IR photometry or Balmer line luminosity after a proper correction for extinction effects. Both methods show convergent results while those based on UV or on [OII]3727 luminosities underestimate the SFR by factors ranging from 5 to 40 for starbursts and for luminous IR galaxies, respectively.
François Hammer +5 more
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Cosmological evolution and hierarchical galaxy formation [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We provide a new multi-waveband compilation of the data describing the cosmological evolution of quasars, and discuss a model that attributes the evolution to variation in the rate of merging between dark halos in a hierarchical universe. We present a new Press-Schechter calculation of the expected merger rate and show that this can reproduce the ...
Percival, W, Miller, L
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The Astrophysical Journal, 2023 We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2–5 μ m imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo- z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields ...
Yoshiaki Ono +10 more
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The formation and evolution of massive galaxies [PDF]
Research in Astronomy and Astrophysics, 2021 11 pages, 11 figures; published in ...
Jing, Ying-Jie +4 more
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LIMFAST. I. A Seminumerical Tool for Line Intensity Mapping
The Astrophysical Journal, 2023 We present LIMFAST, a seminumerical code for simulating high-redshift galaxy formation and cosmic reionization as revealed by multitracer line intensity mapping (LIM) signals.
Lluís Mas-Ribas +4 more
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LIMFAST. II. Line Intensity Mapping as a Probe of High-redshift Galaxy Formation
The Astrophysical Journal, 2023 The epoch of reionization (EoR) offers a unique window into the dawn of galaxy formation, through which high-redshift galaxies can be studied by observations of both themselves and their impact on the intergalactic medium.
Guochao Sun +7 more
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Galaxy formation and evolution: low-surface-brightness galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We investigate in detail the hypothesis that low surface brightness galaxies (LSB) differ from ordinary galaxies simply because they form in halos with large spin parameters. We compute star formation rates using the Schmidt law, assuming the same gas infall dependence on surface density as used in models of the Milky Way.
Jimenez, Raul +3 more
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