Early Results from GLASS-JWST. IX. First Spectroscopic Confirmation of Low-mass Quiescent Galaxies at z > 2 with NIRISS

Early Results from GLASS-JWST. IX. First Spectroscopic Confirmation of Low-mass Quiescent Galaxies at z > 2 with NIRISS
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GLASS-JWST 的早期结果。

DOI：
10.3847/2041-8213/acaaac
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发表时间：
2022
期刊：
The Astrophysical Journal Letters
影响因子：
--
通讯作者：
E. Vanzella
E. Vanzella
中科院分区：
--
文献类型：
--
作者：
D. Marchesini;G. Brammer;T. Morishita;P. Bergamini;Xin Wang;M. Bradač;G. Roberts;V. Strait;T. Treu;A. Fontana;T. Jones;P. Santini;B. Vulcani;A. Acebrón;A. Calabró;M. Castellano;K. Glazebrook;C. Grillo;A. Mercurio;T. Nanayakkara;P. Rosati;C. Tubthong;E. Vanzella

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How passive galaxies form, and the physical mechanisms which prevent star formation over long timescales, are some of the most outstanding questions in understanding galaxy evolution. The properties of quiescent galaxies over cosmic time provide crucial information to identify the quenching mechanisms. Passive galaxies have been confirmed and studied out to z ∼ 4, but all of these studies have been limited to massive systems (mostly with log(Mstar/M⊙)>10.8 ). Using JWST-NIRISS grism slitless spectroscopic data from the GLASS-JWST Early Release Science program, we present spectroscopic confirmation of two quiescent galaxies at zspec=2.650−0.006+0.004 and zspec=2.433−0.016+0.032 (3σ errors) with stellar masses of log(Mstar/M⊙)=10.59−0.05+0.11 and log(Mstar/M⊙)=10.07−0.03+0.06 (corrected for magnification factors of μ = 2.0 and μ = 2.1, respectively). The latter represents the first spectroscopic confirmation of the existence of low-mass quiescent galaxies at cosmic noon, showcasing the power of JWST to identify and characterize this enigmatic population.
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影响因子： --
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