Finding high-redshift dark stars with the James Webb Space Telescope
Erik Zackrisson, Pat Scott, Claes-Erik Rydberg, Fabio Iocco, Bengt Edvardsson, Göran Östlin, Sofia Sivertsson, Adi Zitrin, Tom Broadhurst, Paolo Gondolo
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12 pages, 7 figures; v2: matches published version
The first stars in the history of the Universe are likely to form in the dense central regions of 10^5-10^6 Msolar cold dark matter halos at z=10-50. The annihilation of dark matter particles in these environments may lead to the formation of so-called dark stars, which are predicted to be cooler, larger, more massive and potentially more long-lived than conventional population III stars. Here, we investigate the prospects of detecting high-redshift dark stars with the upcoming James Webb Space Telescope (JWST). We find that dark stars at z>6 are intrinsically too faint to be detected by JWST. However, by exploiting foreground galaxy clusters as gravitational telescopes, certain varieties of cool (Teff < 30000 K) dark stars should be within reach at redshifts up to z=10. If the lifetimes of dark stars are sufficiently long, many such objects may also congregate inside the first galaxies. We demonstrate that this could give rise to peculiar features in the integrated spectra of galaxies at high redshifts, provided that dark stars make up at least 1 percent of the total stellar mass in such objects.
First constraints on QCD axion dark matter using James Webb Space Telescope observations
Flatiron Institute（平顿研究所）；Perimeter Institute for Theoretical Physics（理论物理前沿研究所）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；University of Chicago（芝加哥大学）
The spectral evolution of the first Galaxies. III. Simulated James Webb Space Telescope spectra of reionization-epoch galaxies with Lyman continuum leakage
The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
GLASS James Webb空间望远镜早期释放科学（以下简称GLASS-JWST-ERS）计划将获得并公开提供ERS活动的最深河外数据。它主要是为了解决两个关键的科学问题，即“什么来源电离宇宙和什么时候？重子如何在星系中循环？“，同时也使各种各样的第一眼科学调查成为可能。在主模式下，它将获得由前景哈勃前沿场星系团Abell 2744透镜的星系的NIRISS和NIRSpec光谱。与此同时，它将使用NIRCam来观察两个偏离星团中心的视场，其中透镜放大率可以忽略不计，因此可以有效地将其视为空白视场。为了让社区做好准备，以获得这一前所未有的数据，我们描述了科学原理，调查设计（包括目标选择和观测设置），并提出了预期灵敏度的预调试估计。此外，我们还介绍了计划公开发布的高级别数据产品，供更广泛的天文学界使用。
Direct Detection of Dark Photon Dark Matter with the James Webb Space Telescope
Tsinghua University（清华大学）；Peking University（北京大学）；Korea Advanced Institute of Science and Technology (KAIST)（韩国科学技术院）；Massachusetts Institute of Technology（麻省理工学院）
New Measurements of Distances to Galaxies in the NGC 1052 Field with the Hubble and James Webb Space Telescopes: Testing the Bullet-Dwarf Origin of the Trail
University of California Santa Cruz（加州大学圣克鲁兹分校）；Space Telescope Science Institute（太空望远镜科学研究所）；San José State University（圣何塞州立大学）；Yale University（耶鲁大学）
UV Luminosity Functions from HST and JWST: A Possible Resolution to the High-Redshift Galaxy Abundance Puzzle and Implications for Cosmic Strings
McGill University（麦吉尔大学）；The University of Texas at Austin（德克萨斯大学奥斯汀分校）；Cosmic Frontier Center, The University of Texas at Austin（德克萨斯大学奥斯汀分校宇宙前沿中心）；Massachusetts Institute of Technology（麻省理工学院）；Center for Theoretical Physics, A Leinweber Institute, Massachusetts Institute of Technology（麻省理工学院莱因韦伯理论物理中心）
