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The Second Data Release of the Survey of the MAgellanic Stellar History (SMASH)
The Astronomical Journal ( IF 5.3 ) Pub Date : 2021-01-20 , DOI: 10.3847/1538-3881/abceb7
David L. Nidever 1, 2 , Knut Olsen 2 , Yumi Choi 1, 3, 4 , Tomas Ruiz-Lara 5, 6, 7 , Amy E. Miller 1, 8 , L. Clifton Johnson 9 , Cameron P. M. Bell 8 , Robert D. Blum 10 , Maria-Rosa L. Cioni 8 , Carme Gallart 6, 7 , Steven R. Majewski 11 , Nicolas F. Martin 12, 13 , Pol Massana 14 , Antonela Monachesi 15, 16 , Noelia E. D. Nol 14 , Joanna D. Sakowska 14 , Roeland P. van der Marel 3, 17 , Alistair R. Walker 18 , Dennis Zaritsky 4 , Eric F. Bell 19 , Blair C. Conn 20, 21 , Thomas J. L. de Boer 22 , Robert A. Gruendl 23, 24 , Matteo Monelli 6, 7 , Ricardo R. Muoz 25 , Abhijit Saha 2 , A. Katherina Vivas 18 , Edouard Bernard 26 , Gurtina Besla 4 , Julio A. Carballo-Bello 27 , Antonio Dorta 6, 7 , David Martinez-Delgado 28 , Alex Goater 14 , Vadim Rusakov 29, 30 , Guy S. Stringfellow 31
Affiliation  

The Large and Small Magellanic Clouds (LMC and SMC) are the largest satellite galaxies of the Milky Way and close enough to allow for a detailed exploration of their structure and formation history. The Survey of the MAgellanic Stellar History (SMASH) is a community Dark Energy Camera (DECam) survey of the Magellanic Clouds using $\sim$50 nights to sample over $\sim$2400 deg$^2$ centered on the Clouds at $\sim$20% filling factor (but with contiguous coverage in the central regions) and to depths of $\sim$24th mag in $ugriz$. The primary goals of SMASH are to map out the extended stellar peripheries of the Clouds and uncover their complicated interaction and accretion history as well as to derive spatially-resolved star formation histories of the central regions and create a "movie" of their past star formation. Here we announce the second SMASH public data release (DR2), which contains all 197 fully-calibrated DECam fields including the main body fields in the central regions. The DR2 data are available through the Astro Data Lab hosted by the NSF's National Optical-Infrared Astronomy Research Laboratory. We highlight three science cases that make use of the SMASH DR2 data and will be published in the future: (1) preliminary star formation histories of the LMC; (2) the search for Magellanic star clusters using citizen scientists; and, (3) photometric metallicities of Magellanic Cloud stars using the DECam $u$-band.

中文翻译:

麦哲伦恒星历史调查(SMASH)第二次数据发布

大麦哲伦云和小麦哲伦云(LMC 和 SMC)是银河系中最大的卫星星系,距离足够近,可以详细探索它们的结构和形成历史。麦哲伦星史调查 (SMASH) 是一项社区暗能量相机 (DECam) 调查麦哲伦星云,使用 $\sim$50 晚以 $\sim$2400 deg$^2$ 为中心,以 $\sim 的云为中心20% 的填充因子(但在中部地区有连续覆盖)和 $ugriz$ 中的 $\sim$24th mag 深度。SMASH 的主要目标是绘制出云的扩展恒星外围,揭示它们复杂的相互作用和吸积历史,以及推导出中心区域的空间分辨恒星形成历史,并制作一部关于它们过去恒星形成的“电影” . 在这里,我们宣布第二个 SMASH 公开数据发布 (DR2),其中包含所有 197 个完全校准的 DECam 场,包括中心区域的主体场。DR2 数据可通过 NSF 国家光学红外天文学研究实验室主持的 Astro 数据实验室获得。我们重点介绍了三个利用 SMASH DR2 数据并将在未来发表的科学案例:(1)LMC 的初步恒星形成历史;(2) 利用公民科学家寻找麦哲伦星团;(3) 使用 DECam $u$-band 测得麦哲伦星云恒星的光度金属丰度。s 国家光学红外天文学研究实验室。我们重点介绍了三个利用 SMASH DR2 数据并将在未来发表的科学案例:(1)LMC 的初步恒星形成历史;(2) 利用公民科学家寻找麦哲伦星团;(3) 使用 DECam $u$-band 测得麦哲伦星云恒星的光度金属丰度。s 国家光学红外天文学研究实验室。我们重点介绍了三个利用 SMASH DR2 数据并将在未来发表的科学案例:(1)LMC 的初步恒星形成历史;(2) 利用公民科学家寻找麦哲伦星团;(3) 使用 DECam $u$-band 测得麦哲伦星云恒星的光度金属丰度。
更新日期:2021-01-20
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