论文标题
大爆炸之后，大量的红色候选人大型星系约为600 Myr
A population of red candidate massive galaxies ~600 Myr after the Big Bang
论文作者
论文摘要
具有恒星群众的星系高达$ \ sim 10^{11} $太阳能团体已被确定为大爆炸后约十亿年的红移$ z \ sim 6 $。很难在更早的时候找到大型星系，因为精确质量估算所需的Balmer Break区域被红移至超过$ 2.5 \ MUM $ $的波长。在这里，我们利用JWST早期发布观察结果的$ 1-5 \ MUM $覆盖范围，以在宇宙历史的第一个〜7.5亿年中搜索本质上的红色星系。在调查区域，我们发现六个候选大型星系（Stellar Mass $> 10^{10} $太阳能团体）$ 7.4 <Z <9.1 $，500-700-700 MYR之后，包括一个星系，其中一个带有$ \ sim 10^{11} $ Solar Masses的恒星质量。如果通过光谱法进行了验证，则大型星系中的恒星质量密度将比基于休息框紫外线选择的样品的先前研究所预期的恒星质量密度要高得多。
Galaxies with stellar masses as high as $\sim 10^{11}$ solar masses have been identified out to redshifts $z \sim 6$, approximately one billion years after the Big Bang. It has been difficult to find massive galaxies at even earlier times, as the Balmer break region, which is needed for accurate mass estimates, is redshifted to wavelengths beyond $2.5\mum$. Here we make use of the $1-5\mum$ coverage of the JWST early release observations to search for intrinsically red galaxies in the first ~750 million years of cosmic history. In the survey area, we find six candidate massive galaxies (stellar mass $>10^{10}$ solar masses) at $7.4 < z < 9.1$, 500 - 700 Myr after the Big Bang, including one galaxy with a possible stellar mass of $\sim 10^{11}$ solar masses. If verified with spectroscopy, the stellar mass density in massive galaxies would be much higher than anticipated from previous studies based on rest-frame ultraviolet-selected samples.
