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Extreme properties in distant dusty galaxies and the molecular gas reservoirs in high-z protocluster
主讲人 靳硕文 主持人 于浩然 / YU Haoran
时间 2021-04-01 14:30:00 报告题目 Extreme properties in distant dusty galaxies and the molecular gas reservoirs in high-z protocluster
首作者 People
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主讲人简介 主讲人简介 地点 厦门大学海韵园物理机电大楼552
办公室 研究院 Instituto de Astrofísica de Canarias (IAC), Spain

Title: Extreme properties in distant dusty galaxies and the molecular gas reservoirs in high-z protocluster

Speaker: Shuowen Jin

Institute: Instituto de Astrofísica de Canarias (IAC), Spain

Host: Yu Gao

Time: 14:30-16:00, Thursday, April 1

Location: Physics Building 552


Abstract:

Dusty star-forming galaxies at z>5 are very rare and their existence challenges current galaxy models. Recently, using our "Super-deblending" technique we selected a sample of z>6 candidates in the COSMOS field and followed up them with ALMA and NOEMA observations. All these galaxies have been spectroscopically confirmed at z=3.6--6 via detection of multiple CO and/or CI emission lines. Remarkably, these galaxies show extreme properties, e.g., optically-dark at Ks/H band, extremely cold dust temperatures, steep RJ slopes impacted by CMB, and compact dust content that is likely even optically thick in FIR. I will present the latest findings of this project.

Meanwhile, I will report the first results of the COALAS large program: a CO(1-0) survey of the Spiderweb protocluster at z=2.16 with the Australia Telescope Compact Array (ATCA) 475 hours observations. We obtained a robust sample of several dozen CO(1-0) detections, constituting the largest sample of molecular gas measurements in high-z clusters to date. We use the CO emitters to place the first constraint on the CO luminosity function and molecular gas density in a high-z cluster environment, which are significantly higher than observed in random fields.


Bio: 靳硕文,2018年于南京大学获得天文学博士学位,2015--2017年期间在法国原子能所联合培养。20191--20211月在西班牙加纳利天体物理研究所Instituto de Astrofísica de Canarias从事博士后研究,近期将去哥本哈根DAWN研究所从事博士后研究。研究兴趣:高红移星系的演化,星系团,早期宇宙的尘埃和星际介质,红外和亚毫米波观测。

Ref:

https://astro.xmu.edu.cn/info/1231/2929.htm

https://ui.adsabs.harvard.edu/abs/2019ApJ...887..144J/abstract