Results 21 to 30 of about 147,516 (226)

Fluctuating feedback-regulated escape fraction of ionizing radiation in low-mass, high-redshift galaxies [PDF]

, 2017
Low mass galaxies are thought to provide the bulk of the ionizing radiation necessary to reionize the Universe. The amount of photons escaping the galaxies is poorly constrained theoretically, and difficult to measure observationally.
M. Trebitsch, J. Blaizot, J. Rosdahl, J. Devriendt, A. Slyz   +4 more
semanticscholar   +1 more source

THE PROPERTIES OF HIGH REDSHIFT GALAXIES

Revista Mexicana de Astronomía y Astrofísica, 2022
This work studies the connection between the first galaxies and their hosting dark matter halos in the early Universe when reionization is concluding. Our numerical models (already presented in an earlier study) trace the star formation history at z = 4 - 8, the galaxy stellar mass function, the stellar-to-halo mass distribution, and other high ...
openaire   +2 more sources

The Far-Ultraviolet Continuum Slope as a Lyman Continuum Escape Estimator at High-redshift [PDF]

Monthly notices of the Royal Astronomical Society, 2022
Most of the hydrogen in the intergalactic medium (IGM) was rapidly ionized at high-redshifts. While observations have established that reionization occurred, observational constraints on the high-redshift ionizing emissivity remain elusive.
J. Chisholm, A. Saldana-Lopez, S. Flury, D. Schaerer, A. Jaskot, R. Amorín, H. Atek, S. Finkelstein, B. Fleming, H. Ferguson, V. Fernández, M. Giavalisco, M. Hayes, T. Heckman, A. Henry, Z. Ji, R. Marques-Chaves, V. Mauerhofer, S. McCandliss, M. Oey, G. Östlin, M. Rutkowski, C. Scarlata, T. Thuan, M. Trebitsch, B. Wang, G. Worseck, X. Xu   +27 more
semanticscholar   +1 more source

HIGH-REDSHIFT GALAXIES IN THE HUBBLE DEEP FIELD : COLOUR SELECTION AND STAR FORMATION HISTORY TO Z 4 [PDF]

, 1996
The Lyman decrement associated with the cumulative effect of H I in QSO absorption systems along the line of sight provides a distinctive feature for identifying galaxies at z ≳ 2.5.
P. Madau, H. Ferguson, M. Dickinson, M. Giavalisco, C. Steidel, A. Fruchter   +5 more
semanticscholar   +1 more source

Nearly all the sky is covered by Lyman-α emission around high-redshift galaxies [PDF]

Nature, 2018
Galaxies are surrounded by large reservoirs of gas, mostly hydrogen, that are fed by inflows from the intergalactic medium and by outflows from galactic winds.
L. Wisotzki, R. Bacon, J. Brinchmann, J. Brinchmann, S. Cantalupo, P. Richter, J. Schaye, K. Schmidt, T. Urrutia, P. Weilbacher, M. Akhlaghi, N. Bouché, T. Contini, B. Guiderdoni, E. C. Herenz, H. Inami, J. Kerutt, F. Leclercq, R. Marino, M. Maseda, A. Monreal-Ibero, A. Monreal-Ibero, T. Nanayakkara, J. Richard, R. Saust, M. Steinmetz, M. Wendt   +26 more
semanticscholar   +1 more source

The [CII] 158 micron line emission in high-redshift galaxies [PDF]

, 2017
The [CII] fine structure transition at 158 microns is the dominant cooling line of cool interstellar gas, and is the brightest of emission lines from star forming galaxies from FIR through meter wavelengths.
G. Lagache, M. Cousin, M. Chatzikos
semanticscholar   +1 more source

Extreme value statistics of the halo and stellar mass distributions at high redshift: are JWST results in tension with ΛCDM? [PDF]

Monthly notices of the Royal Astronomical Society, 2022
The distribution of dark matter halo masses can be accurately predicted in the ΛCDM cosmology. The presence of a single massive halo or galaxy at a particular redshift, assuming some baryon and stellar fraction for the latter, can therefore be used to ...
C. Lovell, I. Harrison, Y. Harikane, S. Tacchella, S. Wilkins   +4 more
semanticscholar   +1 more source

Disk Galaxies at High Redshift? [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractThe successful implementation of integral field near-infrared spectrographs fed by adaptive optics is providing unprecedented views of gas motions within galaxies at redshifts z = 2 − 3, when the universe was forming stars at its peak rate. A complex picture of galaxy kinematics is emerging, with inflows, rotation within sometimes extended and ...
openaire   +1 more source

High redshift radio galaxies and divergence from the CMB dipole [PDF]

, 2017
Previous studies have found our velocity in the rest frame of radio galaxies at high redshift to be much larger than that inferred from the dipole anisotropy of the cosmic microwave background.
J. Colin, R. Mohayaee, M. Rameez, S. Sarkar, S. Sarkar   +4 more
semanticscholar   +1 more source

The IRX–β relation of high-redshift galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT The relation between infrared excess (IRX) and UV spectral slope (βUV) is an empirical probe of dust properties of galaxies. The shape, scatter, and redshift evolution of this relation are not well understood, however, leading to uncertainties in estimating the dust content and star formation rates (SFRs) of galaxies at high ...
Liang, Lichen, Feldmann, Robert, Hayward, Christopher C, Narayanan, Desika, Çatmabacak, Onur, Kereš, Dušan, Faucher-Giguère, Claude-André, Hopkins, Philip F   +7 more
openaire   +4 more sources