Results 21 to 30 of about 210,144 (261)
Target Selection and Sample Characterization for the DESI LOW-Z Secondary Target Program
The Astrophysical Journal, 2023 We introduce the DESI LOW- Z Secondary Target Survey, which combines the wide-area capabilities of the Dark Energy Spectroscopic Instrument (DESI) with an efficient, low-redshift target selection method.
Elise Darragh-Ford +41 more
doaj +1 more source
The erratic dynamical life of black hole seeds in high-redshift galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The dynamics of black hole seeds in high redshift galaxies is key to understand their ability to grow via accretion and to pair in close binaries during galactic mergers.
H. Pfister +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
Accurately predicting the escape fraction of ionizing photons using restframe ultraviolet absorption lines [PDF]
, 2018 The fraction of ionizing photons that escape high-redshift galaxies sensitively determines whether galaxies reionized the early universe. However, this escape fraction cannot be measured from high-redshift galaxies because the opacity of the ...
Bayliss, M. +8 more
core +4 more sources
The Astrophysical Journal, 2023 High-resolution imaging of galaxies in rest-frame UV has revealed the existence of giant star-forming clumps prevalent in high-redshift galaxies. Studying these substructures provides important information about their formation and evolution and informs ...
Zahra Sattari +27 more
doaj +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
RECONCILING THE STELLAR AND NEBULAR SPECTRA OF HIGH-REDSHIFT GALAXIES [PDF]
, 2016 We present a combined analysis of rest-frame far-UV (FUV; 1000–2000 Å) and rest-frame optical (3600–7000 Å) composite spectra formed from very deep Keck/LRIS and Keck/MOSFIRE observations of a sample of 30 star-forming galaxies with , selected to be ...
C. Steidel +5 more
semanticscholar +1 more source
The Puzzling Properties of the MACS1149-JD1 Galaxy at z = 9.11
The Astrophysical Journal Letters, 2023 We analyze new JWST NIRCam and NIRSpec data on the redshift 9.11 galaxy MACS1149-JD1 (hereafter JD1). Our NIRCam imaging data reveal that JD1 comprises three spatially distinct components. Our spectroscopic data indicate that JD1 appears dust free but is
Massimo Stiavelli +8 more
doaj +1 more source
Stars were born in significantly denser regions in the early Universe [PDF]
, 2014 The density of the warm ionized gas in high-redshift galaxies is known to be higher than what is typical in local galaxies on similar scales. At the same time, the mean global properties of the high- and low-redshift galaxies are quite different.
Brinchmann, Jarle +2 more
core +1 more source
Large Disklike Galaxies at High Redshift [PDF]
The Astrophysical Journal, 2003 LaTeX, 5 pages, 2 figures, 1 table.
Labbé, Ivo +13 more
openaire +5 more sources