The Massive Ancient Galaxies at z > 3 NEar-infrared (MAGAZ3NE) Survey: Confirmation of Extremely Rapid Star Formation and Quenching Timescales for Massive Galaxies in the Early Universe

We present near-infrared spectroscopic confirmations of a sample of 16 photometrically selected galaxies with stellar masses >11 at redshift z > 3 from the XMM-VIDEO and COSMOS-UltraVISTA fields using Keck/MOSFIRE as part of the Massive Ancient Galaxies At z > 3 NEar-infrared (MAGAZ3NE) s...

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Veröffentlicht in:	The Astrophysical journal 2020-11, Vol.903 (1), p.47
Hauptverfasser:	Forrest, Ben, Marsan, Z. Cemile, Annunziatella, Marianna, Wilson, Gillian, Muzzin, Adam, Marchesini, Danilo, Cooper, M. C., Chan, Jeffrey C. C., McConachie, Ian, Gomez, Percy, Kado-Fong, Erin, Barbera, Francesco La, Lange-Vagle, Daniel, Nantais, Julie, Nonino, Mario, Saracco, Paolo, Stefanon, Mauro, van der Burg, Remco F. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Active galactic nuclei Astrophysics Emission lines Galactic evolution Galaxies Infrared photometry Infrared spectra Near infrared radiation Polls & surveys Red shift Space telescopes Star & galaxy formation Star formation Stars Stars & galaxies Universe
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Zusammenfassung:	We present near-infrared spectroscopic confirmations of a sample of 16 photometrically selected galaxies with stellar masses >11 at redshift z > 3 from the XMM-VIDEO and COSMOS-UltraVISTA fields using Keck/MOSFIRE as part of the Massive Ancient Galaxies At z > 3 NEar-infrared (MAGAZ3NE) survey. Eight of the ultramassive galaxies (UMGs) have specific star formation rates (sSFR) 1 Gyr −1 . Model star formation histories of these galaxies describe systems that formed the majority of their stars in vigorous bursts of several hundred megayear duration around during which hundreds to thousands of solar masses were formed per year. These formation ages of
ISSN:	0004-637X 1538-4357
DOI:	10.3847/1538-4357/abb819