船员关键论文V：关于HST-Dark星系性质的试验

论文标题

船员关键论文V：关于HST-Dark星系性质的试验

CEERS Key Paper V: A triality on the nature of HST-dark galaxies

论文作者

Pérez-González, Pablo G., Barro, Guillermo, Annunziatella, Marianna, Costantin, Luca, García-Argumánez, Ángela, McGrath, Elizabeth J., Mérida, Rosa M., Zavala, Jorge A., Haro, Pablo Arrabal, Bagley, Micaela B., Backhaus, Bren E., Behroozi, Peter, Bell, Eric F., Bisigello, Laura, Buat, Véronique, Calabrò, Antonello, Casey, Caitlin M., Cleri, Nikko J., Coogan, Rosemary T., Cooper, M. C., Cooray, Asantha R., Dekel, Avishai, Dickinson, Mark, Elbaz, David, Ferguson, Henry C., Finkelstein, Steven L., Fontana, Adriano, Franco, Maximilien, Gardner, Jonathan P., Giavalisco, Mauro, Gómez-Guijarro, Carlos, Grazian, Andrea, Grogin, Norman A., Guo, Yuchen, Huertas-Company, Marc, Jogee, Shardha, Kartaltepe, Jeyhan S., Kewley, Lisa J., Kirkpatrick, Allison, Kocevski, Dale D., Koekemoer, Anton M., Long, Arianna S., Lotz, Jennifer M., Lucas, Ray A., Papovich, Casey, Pirzkal, Nor, Ravindranath, Swara, Somerville, Rachel S., Tacchella, Sandro, Trump, Jonathan R., Wang, Weichen, Wilkins, Stephen M., Wuyts, Stijn, Yang, Guang, Yung, L. Y. Aaron

论文摘要

JWST在近红外（IR）中提供的新功能用于以空前的细节调查光学/近IIR中的淡淡的中ir明亮来源的性质，其中包括HST-Dark Galaxies。我们从Ceers调查中收集JWST数据，与HST数据共同分析，并分析了空间分析的光学到中IR光谱能量分布（SEDS），以估计2维度的光度红移和像素基于像素基础中的恒星种群中的恒星种群。我们选择138个带有F150W-F356W的星系> 1.5 MAG，F356W <27.5 mag。这些来源的性质是三倍：（1）71％是2 <z <6的尘土形成星系，质量为9 <log m/m_sun <11和各种特定的SFR（<1至> 100 gyr^-1）；（2）18％是静态/休眠（即，在3 <z <5处可能会重新点燃和复兴）星系，群众log m/m_sun〜10和史变斯特恒星恒星大量质量权威年龄（0.5-1 Gyr）；（3）11％是强大的年轻星爆，在6 <z <7和log m/m_sun 〜9.5时，具有高-EW排放线（通常为[OIII]+HBETA）的指示。该样品由磁盘样星系支配，具有明显的XELG-Z6（有效半径小于0.4 kpc）的星系。在SFG中，2 <a（v）<5 mag的大衰减在有效半径（约2 kpc）的1.5倍之内，而QGS则显示A（v）〜0.2 mag。我们的SED拟合技术再现了IR-Bright和次毫米星系的预期粉尘发射光度。这项研究意味着Z〜20至Z〜10之间的高水平的恒星形成活性，几乎100％的星系已经形成了其恒星含量的10^8 m_sun，其中60％的星系已组装了10^9 m_sun，最多10^10^10 m_sun（原位或原位）。（简略）

The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR faint, mid-IR bright sources, HST-dark galaxies among them. We gather JWST data from the CEERS survey in the EGS, jointly with HST data, and analyze spatially resolved optical-to-mid-IR spectral energy distributions (SEDs) to estimate both photometric redshifts in 2 dimensions and stellar populations properties in a pixel-by-pixel basis. We select 138 galaxies with F150W-F356W>1.5 mag, F356W<27.5 mag. The nature of these sources is threefold: (1) 71% are dusty star-forming galaxies at 2<z<6 with masses 9<log M/M_sun<11 and a variety of specific SFRs (<1 to >100 Gyr^-1); (2) 18% are quiescent/dormant (i.e., subject to reignition and rejuvenation) galaxies at 3<z<5, masses log M/M_sun~10 and post-starburst stellar mass-weighted ages (0.5-1 Gyr); and (3) 11% are strong young starbursts with indications of high-EW emission lines (typically, [OIII]+Hbeta) at 6<z<7 and log M/M_sun~9.5. The sample is dominated by disk-like galaxies with a remarkable compactness for XELG-z6 (effective radii smaller than 0.4 kpc). Large attenuations in SFGs, 2<A(V)<5 mag, are found within 1.5 times the effective radius, approximately 2 kpc, while QGs present A(V)~0.2 mag. Our SED-fitting technique reproduces the expected dust emission luminosities of IR-bright and sub-millimeter galaxies. This study implies high levels of star formation activity between z~20 and z~10, where virtually 100% of our galaxies had already formed 10^8 M_sun of their stellar content, 60% of them had assembled 10^9 M_sun, and 10% up to 10^10 M_sun (in situ or ex situ). (abridged)

下载PDF全文

下载文献需遵守相关版权规定

论文标题