论文标题
Glass-JWST的早期结果。 XI：Z> 7星系的恒星质量和质量比率
Early results from GLASS-JWST. XI: Stellar masses and mass-to-light ratio of z>7 galaxies
论文作者
论文摘要
我们利用James Webb太空望远镜（JWST）NIRCAM从玻璃JWST释放的科学计划进行了观察，以调查Z> 7时的Galaxy Stellar Masses。我们首先表明，与迄今为止可用的最高质量数据集相比，JWST观测值将恒星质量的不确定性减少至少5-10倍。然后，我们研究了紫外线质量比的比率，发现星系对于给定的发光度表现出两个数量级的m/l_uv值范围，这表明了各种各样的物理条件和恒星形成历史。结果，基于紫外线光度和恒星质量之间的平均相关性，对宇宙恒星恒星质量密度的先前估计值可能会偏向〜6。我们的第一次探索表明，JWST代表了我们在Z> 7时对恒星群体的理解，因此是宇宙恢复之前星系增长的新时代。
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 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 star 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.
