Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies

P. Santini; A. Fontana; M. Castellano; N. Leethochawalit; M. Trenti; T. Treu; D. Belfiori; S. Birrer; A. Bonchi; E. Merlin; C. Mason; T. Morishita; M. Nonino; D. Paris; G. Polenta; P. Rosati; L. Yang; K. Boyett; M. Bradac; A. Calabro; A. Dressler; K. Glazebrook; D. Marchesini; S. Mascia; T. Nanayakkara; L. Pentericci; G. Roberts-Borsani; C. Scarlata; B. Vulcani; Xin Wang

doi:10.3847/2041-8213/ac9586

Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies

P. Santini^*, A. Fontana, M. Castellano, N. Leethochawalit, M. Trenti, T. Treu, D. Belfiori, S. Birrer, A. Bonchi, E. Merlin, C. Mason, T. Morishita, M. Nonino, D. Paris, G. Polenta, P. Rosati, L. Yang, K. Boyett, M. Bradac, A. CalabroA. Dressler, K. Glazebrook, D. Marchesini, S. Mascia, T. Nanayakkara, L. Pentericci, G. Roberts-Borsani, C. Scarlata, B. Vulcani, Xin Wang

^*Corresponding author for this work

The Cosmic Dawn Center

Research output: Contribution to journal › Letter › peer-review

53 Citations (Scopus)

14 Downloads (Pure)

Abstract

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.

Original language	English
Article number	L27
Journal	Astrophysical Journal Letters
Volume	942
Issue number	2
Number of pages	6
ISSN	2041-8205
DOIs	https://doi.org/10.3847/2041-8213/ac9586
Publication status	Published - 10 Jan 2023

Keywords

PHOTOMETRIC REDSHIFTS
EVOLUTION
CATALOGS
ABELL-2744
SELECTION
IMPACT

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10.3847/2041-8213/ac9586Licence: CC BY

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Cite this

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., ... Wang, X. (2023). Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies. Astrophysical Journal Letters, 942(2), [L27]. https://doi.org/10.3847/2041-8213/ac9586

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 › peer-review

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, X 2023, 'Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies', Astrophysical Journal Letters, vol. 942, no. 2, L27. https://doi.org/10.3847/2041-8213/ac9586

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. / Early Results from GLASS-JWST. XI. Stellar Masses and Mass-to-light Ratio of z > 7 Galaxies. In: Astrophysical Journal Letters. 2023 ; Vol. 942, No. 2.

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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.

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KW - EVOLUTION

KW - CATALOGS

KW - ABELL-2744

KW - SELECTION

KW - IMPACT

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