Details

Autor(en) / Beteiligte

• 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.
• Calabrò, A.
• Dressler, A.
• Glazebrook, K.
• Marchesini, D.
• Mascia, S.
• Nanayakkara, T.
• Pentericci, L.
• Roberts-Borsani, G.
• Scarlata, C.
• Vulcani, B.
• Wang, Xin

Titel

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

Ist Teil von

• Astrophysical journal. Letters, 2023-01, Vol.942 (2), p.L27

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• 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 ∼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.