Galaxy Stellar Mass Functions from z similar to 10 to z similar to 6 using the Deepest Spitzer/Infrared Array Camera Data: No Significant Evolution in the Stellar-to-halo Mass Ratio of Galaxies in the First Gigayear of Cosmic Time
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Galaxy Stellar Mass Functions from z similar to 10 to z similar to 6 using the Deepest Spitzer/Infrared Array Camera Data : No Significant Evolution in the Stellar-to-halo Mass Ratio of Galaxies in the First Gigayear of Cosmic Time. / Stefanon, Mauro; Bouwens, Rychard J.; Labbe, Ivo; Illingworth, Garth D.; Gonzalez, Valentino; Oesch, Pascal A.
I: Astrophysical Journal, Bind 922, Nr. 1, 29, 16.11.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Galaxy Stellar Mass Functions from z similar to 10 to z similar to 6 using the Deepest Spitzer/Infrared Array Camera Data
T2 - No Significant Evolution in the Stellar-to-halo Mass Ratio of Galaxies in the First Gigayear of Cosmic Time
AU - Stefanon, Mauro
AU - Bouwens, Rychard J.
AU - Labbe, Ivo
AU - Illingworth, Garth D.
AU - Gonzalez, Valentino
AU - Oesch, Pascal A.
PY - 2021/11/16
Y1 - 2021/11/16
N2 - We present new stellar mass functions at z similar to 6, z similar to 7, z similar to 8, z similar to 9 and, for the first time, z similar to 10, constructed from similar to 800 Lyman-break galaxies previously identified over the eXtreme Deep Field and Hubble Ultra-Deep Field parallel fields and the five Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey fields. Our study is distinctive due to (1) the much deeper (similar to 200 hr) wide-area Spitzer/Infrared Array Camera (IRAC) imaging at 3.6 mu m and 4.5 mu m from the Great Observatories Origins Deep Survey Re-ionization Era Wide-area Treasury from Spitzer program (GREATS) and (2) consideration of z similar to 6-10 sources over a 3 x larger area than those of previous Hubble Space Telescope+Spitzer studies. The Spitzer/IRAC data enable >=.2 rest-frame optical detections for an unprecedented 50% of galaxies down to a stellar mass limit of similar to 10(8) M-circle dot across all redshifts. Schechter fits to our volume densities suggest a combined evolution in the characteristic mass M* and normalization factor phi* between z similar to 6 and z similar to 8. The stellar mass density (SMD) increases by similar to 1000 x in the -500 Myr between z similar to 10 and z similar to 6, with indications of a steeper evolution between z similar to 10 and z similar to 8, similar to the previously reported trend of the star formation rate density. Strikingly, abundance matching to the Bolshoi-Planck simulation indicates halo mass densities evolving at approximately the same rate as the SMD between z similar to 10 and z similar to 4. Our results show that the stellar-to-halo mass ratios, a proxy for the star formation efficiency, do not change significantly over the huge stellar mass buildup occurred from z similar to 10 to z similar to 6, indicating that the assembly of stellar mass closely mirrors the buildup in halo mass in the first similar to 1 Gyr of cosmic history. The James Webb Space Telescope is poised to extend these results into the "first galaxy" epoch at z greater than or similar to 10.
AB - We present new stellar mass functions at z similar to 6, z similar to 7, z similar to 8, z similar to 9 and, for the first time, z similar to 10, constructed from similar to 800 Lyman-break galaxies previously identified over the eXtreme Deep Field and Hubble Ultra-Deep Field parallel fields and the five Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey fields. Our study is distinctive due to (1) the much deeper (similar to 200 hr) wide-area Spitzer/Infrared Array Camera (IRAC) imaging at 3.6 mu m and 4.5 mu m from the Great Observatories Origins Deep Survey Re-ionization Era Wide-area Treasury from Spitzer program (GREATS) and (2) consideration of z similar to 6-10 sources over a 3 x larger area than those of previous Hubble Space Telescope+Spitzer studies. The Spitzer/IRAC data enable >=.2 rest-frame optical detections for an unprecedented 50% of galaxies down to a stellar mass limit of similar to 10(8) M-circle dot across all redshifts. Schechter fits to our volume densities suggest a combined evolution in the characteristic mass M* and normalization factor phi* between z similar to 6 and z similar to 8. The stellar mass density (SMD) increases by similar to 1000 x in the -500 Myr between z similar to 10 and z similar to 6, with indications of a steeper evolution between z similar to 10 and z similar to 8, similar to the previously reported trend of the star formation rate density. Strikingly, abundance matching to the Bolshoi-Planck simulation indicates halo mass densities evolving at approximately the same rate as the SMD between z similar to 10 and z similar to 4. Our results show that the stellar-to-halo mass ratios, a proxy for the star formation efficiency, do not change significantly over the huge stellar mass buildup occurred from z similar to 10 to z similar to 6, indicating that the assembly of stellar mass closely mirrors the buildup in halo mass in the first similar to 1 Gyr of cosmic history. The James Webb Space Telescope is poised to extend these results into the "first galaxy" epoch at z greater than or similar to 10.
KW - UV LUMINOSITY FUNCTIONS
KW - HUBBLE FRONTIER FIELDS
KW - LYMAN BREAK GALAXIES
KW - STAR-FORMATION RATES
KW - LENSING MAGNIFICATION
KW - NEBULAR EMISSION
KW - BILLION YEARS
KW - THAN 7
KW - FORMATION EFFICIENCY
KW - SPITZER OBSERVATIONS
U2 - 10.3847/1538-4357/ac1bb6
DO - 10.3847/1538-4357/ac1bb6
M3 - Journal article
VL - 922
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 29
ER -
ID: 285310209