Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies
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Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies. / Santini, P.; Fontana, A.; Castellano, M.; Leethochawalit, N.; Trenti, M.; Treu, T.; Belfiori, D.; Birrer, S.; Bonchi, A.; Merlin, E.; Mason, C.; Morishita, T.; Nonino, M.; Paris, D.; Polenta, G.; Rosati, P.; Yang, L.; Boyett, K.; Bradac, M.; Calabro, A.; Dressler, A.; Glazebrook, K.; Marchesini, D.; Mascia, S.; Nanayakkara, T.; Pentericci, L.; Roberts-Borsani, G.; Scarlata, C.; Vulcani, B.; Wang, Xin.
In: Astrophysical Journal Letters, Vol. 942, No. 2, L27, 10.01.2023.Research output: Contribution to journal › Letter › Research › peer-review
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TY - JOUR
T1 - Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies
AU - Santini, P.
AU - Fontana, A.
AU - Castellano, M.
AU - Leethochawalit, N.
AU - Trenti, M.
AU - Treu, T.
AU - Belfiori, D.
AU - Birrer, S.
AU - Bonchi, A.
AU - Merlin, E.
AU - Mason, C.
AU - Morishita, T.
AU - Nonino, M.
AU - Paris, D.
AU - Polenta, G.
AU - Rosati, P.
AU - Yang, L.
AU - Boyett, K.
AU - Bradac, M.
AU - Calabro, A.
AU - Dressler, A.
AU - Glazebrook, K.
AU - Marchesini, D.
AU - Mascia, S.
AU - Nanayakkara, T.
AU - Pentericci, L.
AU - Roberts-Borsani, G.
AU - Scarlata, C.
AU - Vulcani, B.
AU - Wang, Xin
PY - 2023/1/10
Y1 - 2023/1/10
N2 - We exploit James Webb Space Telescope (JWST) NIRCam observations from the GLASS-JWST-Early Release Science program to investigate galaxy stellar masses at z > 7. We first show that JWST observations reduce the uncertainties on the stellar mass by a factor of at least 5-10, when compared with the highest-quality data sets available to date. We then study the UV mass-to-light ratio, finding that galaxies exhibit a a two orders of magnitude range of M/L (UV) values for a given luminosity, indicative of a broad variety of physical conditions and star formation histories. As a consequence, previous estimates of the cosmic stellar-mass density-based on an average correlation between UV luminosity and stellar mass-can be biased by as much as a factor of similar to 6. Our first exploration demonstrates that JWST represents a new era in our understanding of stellar masses at z > 7 and, therefore, of the growth of galaxies prior to cosmic reionization.
AB - We exploit James Webb Space Telescope (JWST) NIRCam observations from the GLASS-JWST-Early Release Science program to investigate galaxy stellar masses at z > 7. We first show that JWST observations reduce the uncertainties on the stellar mass by a factor of at least 5-10, when compared with the highest-quality data sets available to date. We then study the UV mass-to-light ratio, finding that galaxies exhibit a a two orders of magnitude range of M/L (UV) values for a given luminosity, indicative of a broad variety of physical conditions and star formation histories. As a consequence, previous estimates of the cosmic stellar-mass density-based on an average correlation between UV luminosity and stellar mass-can be biased by as much as a factor of similar to 6. Our first exploration demonstrates that JWST represents a new era in our understanding of stellar masses at z > 7 and, therefore, of the growth of galaxies prior to cosmic reionization.
KW - PHOTOMETRIC REDSHIFTS
KW - EVOLUTION
KW - CATALOGS
KW - ABELL-2744
KW - SELECTION
KW - IMPACT
U2 - 10.3847/2041-8213/ac9586
DO - 10.3847/2041-8213/ac9586
M3 - Letter
VL - 942
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - L27
ER -
ID: 337693183