EPOCHS III: Unbiased UV continuum slopes at 6.5<z<13 from combined PEARLS GTO and public JWST NIRCam imaging
Duncan Austin, Christopher J. Conselice, Nathan J. Adams, Thomas Harvey, Qiao Duan, James Trussler, Qiong Li, Ignas Juodzbalis, Katherine Ormerod, Leonardo Ferr… 展开作者
Duncan Austin, Christopher J. Conselice, Nathan J. Adams, Thomas Harvey, Qiao Duan, James Trussler, Qiong Li, Ignas Juodzbalis, Katherine Ormerod, Leonardo Ferreira, Lewi Westcott, Honor Harris, Stephen M. Wilkins, Rachana Bhatawdekar, Joseph Caruana, Dan Coe, Seth H. Cohen, Simon P. Driver, Jordan C. J. D'Silva, Brenda Frye, Lukas J. Furtak, Norman A. Grogin, Nimish P. Hathi, Benne W. Holwerda, Rolf A. Jansen, Anton M. Koekemoer, Madeline A. Marshall, Mario Nonino, Rafael Ortiz, Nor Pirzkal, Aaron Robotham, Russell E. Ryan, Jake Summers, Christopher N. A. Willmer, Rogier A. Windhorst, Haojing Yan, Erik Zackrisson
We present an analysis of rest-frame UV continuum slopes, $β$, using a sample of 1011 galaxies at $6.5<z<13$ from the EPOCHS photometric sample collated from the GTO PEARLS and public ERS/GTO/GO (JADES, CEERS, NGDEEP, GLASS) JWST NIRCam imaging across $178.9~\mathrm{arcmin}^2$ of unmasked blank sky. We correct our UV slopes for the photometric error coupling bias using $200,000$ power law SEDs for each $β=\{-1,-1.5,-2,-2.5,-3\}$ in each field, finding biases as large as $Δβ\simeq-0.55$ for the lowest SNR galaxies in our sample. Additionally, we simulate the impact of rest-UV line emission (including Ly$α$) and damped Ly$α$ systems on our measured $β$, finding biases as large as $0.5-0.6$ for the most extreme systems. We find a decreasing trend with redshift of $β=-1.51\pm0.08-(0.097\pm0.010)\times z$, with potential evidence for Pop.~III stars or top-heavy initial mass functions (IMFs) in a subsample of 68 $β+σ_β<-2.8$ galaxies. At $z\simeq11.5$, we measure an extremely blue $β(M_{\mathrm{UV}}=-19)=-2.73\pm0.06$, deviating from simulations, indicative of low-metallicity galaxies with non-zero Lyman continuum escape fractions $f_{\mathrm{esc, LyC}}\gtrsim0$ and minimal dust content. The observed steepening of $\mathrm{d}β/\mathrm{d}\log_{10}(M_{\star}/\mathrm{M}_{\odot})$ from $0.22\pm0.02$ at $z=7$ to $0.81\pm0.13$ at $z=11.5$ implies that dust produced in core-collapse supernovae (SNe) at early times may be ejected via outflows from low mass galaxies. We also observe a flatter $\mathrm{d}β/\mathrm{d}M_{\mathrm{UV}}=0.03\pm0.02$ at $z=7$ and a shallower $\mathrm{d}β/\mathrm{d}\log_{10}(M_{\star} / \mathrm{M}_{\odot})$ at $z<11$ than seen by HST, unveiling a new population of low mass, faint, galaxies reddened by dust produced in the stellar winds of asymptotic giant branch (AGB) stars or carbon-rich Wolf-Rayet binaries.
PEARLS: 21 Transients Found in the Three-Epoch NIRCam Observations in the Continuous Viewing Zone of the James Webb Space Telescope
University of Missouri（密苏里大学）；University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校）；Texas A. & M. University（德克萨斯农工大学）；University of Arizona（亚利桑那大学）；Oklahoma State University（俄克拉荷马州立大学）；Space Telescope Science Institute（太空望远镜科学研究所）；The Ohio State University（俄亥俄州立大学）
JWSTs PEARLS: NIRCam imaging and NIRISS spectroscopy of a $z=3.6$ star-forming galaxy lensed into a near-Einstein Ring by a $z=1.258$ massive elliptical galaxy
PEARLS: Two Distinct Populations of AGN Hosts Moving Between Star Formation and Quiescence
School of Earth and Space Exploration, Arizona State University（亚利桑那州立大学地球与空间探索学院）；Center for Astrophysics | Harvard & Smithsonian（哈佛-史密森天体物理中心）；Steward Observatory, University of Arizona（亚利桑那大学斯图尔德天文台）
Galaxy-scale lens search in the PEARLS NEP TDF and CEERS JWST fields
University of Melbourne（墨尔本大学）；ARC Centre of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D)（三维全天空天体物理学卓越研究中心）；Arizona State University（亚利桑那州立大学）；Instituto de Fisica de Cantabria (CSIC-UC)（坎塔布里亚物理研究所）；Space Telescope Science Institute（太空望远镜科学研究所）
PDRs4All XVIII. JWST-NIRCam Photometric properties of protoplanetary disks in the Orion Nebula Cluster
Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, Centre National de la Recherche Scientifique (CNRS), Centre National d’Etudes Spatiales（天体物理学与行星学研究所以及图卢兹大学、法国国家科学研究中心（CNRS）、法国国家空间研究中心）；Space Telescope Science Institute（太空望远镜科学研究所）；Johns Hopkins University（约翰斯·霍普金斯大学）；Queen Mary University of London（伦敦大学玛丽女王学院）；NASA Ames Research Center（美国宇航局艾姆斯研究中心）；Institut des Sciences Moléculaires d’Orsay, Université Paris-Saclay, CNRS（奥赛分子科学研究所、巴黎萨克雷大学、法国国家科学研究中心（CNRS））；Centro de Astrobiología (CAB), INTA-CSIC（天体生物学中心（CAB），西班牙国家航空航天技术研究所-西班牙国家研究委员会）；Instituto de Física Fundamental (CSIC)（基础物理研究所（CSIC））；Institut d’Astrophysique Spatiale, Université Paris-Saclay, CNRS（天体物理研究所、巴黎萨克雷大学、法国国家科学研究中心（CNRS））
JWST's PEARLS: A clumpy ring galaxy at $z = 4.0148$
University of Illinois（伊利诺伊大学）；Durham University（杜伦大学）；Arizona State University（亚利桑那州立大学）；Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, CAS（中国科学院南天文中心，国家天文台，中科院）；Jodrell Bank Centre for Astrophysics, University of Manchester（曼彻斯特大学乔德雷尔银行天体物理学中心）；Instituto de Fisica de Cantabria (CSIC-UC)（坎塔布里亚物理研究所（西班牙科学理事会-坎塔布里亚大学））；University of Arizona（亚利桑那大学）；Space Telescope Science Institute（太空望远镜科学研究所）
PEARLS: JWST Counterparts of Micro-Jy Radio Sources in the NEP Time Domain Field. II. All Four Spokes
Center for Astrophysics | Harvard & Smithsonian（天体物理中心 | 哈佛与史密森尼学会）；Eureka Scientific（尤里卡科学）；INAF––Istituto di Astrofisica Spaziale e Fisica Cosmica Milano（意大利国家天体物理研究所米兰空间天体物理与宇宙物理研究所）；School of Earth and Space Exploration, Arizona State University（亚利桑那州立大学地球与空间探索学院）；Space Telescope Science Institute（太空望远镜科学研究所）
JWST's PEARLS: Temperatures of Nine Highly Magnified Stars in a Galaxy at Redshift 0.94 and Simulated Stellar Population Dependence on Stellar Metallicity and the Initial Mass Function
