Montana State University（蒙大拿州立大学）；University of Edinburgh（爱丁堡大学）；Flatiron Institute（平顿研究所）；University of Virginia（弗吉尼亚大学）；Universidad Diego Portales（迭戈·波特莱斯大学）；Lund University（隆德大学）；University of Colorado（科罗拉多大学）；NASA Ames Research Center（美国国家航空航天局艾姆斯研究中心）；Space Telescope Science Institute（太空望远镜科学研究所）；Leibniz-Institut für Astrophysik (AIP)（莱布尼茨天体物理研究所）；Johns Hopkins University（约翰斯·霍普金斯大学）
David L. Nidever, Danny Horta, Steven R. Majewski, Andres Almeida, Joshua T. Povick, Slater J. Oden, Oscar Jimenez-Arranz, Guy Stringfellow, S. Drew Chojnowski,… 展开作者
David L. Nidever, Danny Horta, Steven R. Majewski, Andres Almeida, Joshua T. Povick, Slater J. Oden, Oscar Jimenez-Arranz, Guy Stringfellow, S. Drew Chojnowski, Roeland van der Marel, Lara Cullinane, Bruno Dias, Jennifer Johnson, John Donor, Maria-Rosa Cioni, Juna Kollmeier, Andrew Tkachenko
The Sloan Digital Sky Survey-V (SDSS-V) Magellanic Genesis survey is a spectroscopic program designed to map the kinematic and chemical structure of the Magellanic Clouds using APOGEE and BOSS spectroscopy. This overview describes the survey's design, target selection, and science goals, and highlights some first results using these data. In the inner regions of the Large and Small Magellanic Clouds (LMC and SMC), the survey obtained high-resolution near-infrared APOGEE spectra (S/N~45) of ~14,000 bright, oxygen-rich asymptotic giant branch (AGB-O) stars. These data provide contiguous spatial coverage of the Clouds' main bodies, enabling detailed chemo-dynamical studies. To explore extended structures, the survey includes BOSS optical spectroscopy of fainter red giant (RG) stars selected with \gaia~DR3 data, reaching G~17.5. Many of these targets extend to the outer regions of the Clouds, which are known to span ~20 deg (LMC) and ~12 deg(SMC) and contain diffuse substructures of unclear origin. BOSS data in the inner regions also complement APOGEE by providing elements inaccessible in the near-infrared and enabling cross-calibration between instruments. The survey further includes APOGEE and BOSS observations of ~300 evolved massive stars and a small sample of symbiotic binaries previously observed by APOGEE-1 and -2, enhancing our understanding of massive stellar evolution and complementing the SDSS-V main-sequence massive star program.
Revisit NGC 5466 Tidal Stream with $Gaia$, SDSS/SEGUE and LAMOST
通过对$Gaia$ EDR 3、SDSS/SEGUE DR 16和LAMOST DR 8的数据挖掘，发现了NGC 5466潮汐流的11颗成员星，其中7颗是新发现的。为了剔除污染物，在天空位置、色星等图、金属丰度、自行和径向速度等方面进行了各种切割。我们将我们的数据与模拟流进行比较，模拟流是通过模拟星系团在平滑的银河系势加上大麦云云（LMC）下的破裂而产生的。模型和观测结果之间相空间的一致趋势意味着流可能受到LMC的扰动。在11颗被探测到的成员中，最远的两颗星的长度可以追溯到天空的$60^\circ$，支持并延长了先前的$45^\circ$的长度。考虑到NGC 5466是如此遥远，并且可能有比以前认为的更长的尾巴，我们预计NGC 5466潮汐流可能是限制银河系引力场的有用工具。
Revealing the Chemical Structure of the Magellanic Clouds with APOGEE. I. Calculating Individual Stellar Ages of RGB Stars in the Large Magellanic Cloud
The red giant branch tip in the SDSS, PS1, JWST, NGRST and Euclid photometric systems. Calibration in optical passbands using Gaia DR3 synthetic photometry
SDSS-V Local Volume Mapper (LVM): Dithered Data Cube Reconstruction with 3dcubegen
Universidad Nacional Autónoma de México（墨西哥国立自治大学）；Instituto de Astronomía, Universidad Nacional Autónoma de México（墨西哥国立自治大学天文研究所）；Universidad Andrés Bello（安德烈斯贝略大学）；Institute of Astrophysics, Facultad de Ciencias Exactas, Universidad Andrés Bello（安德烈斯贝略大学精确科学学院天体物理研究所）；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Cátedras CONAHCYT. Universidad Nacional Autónoma de México, Instituto de Astronomía（墨西哥国家科学技术委员会讲席教授项目，墨西哥国立自治大学天文研究所）；Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg（海德堡大学天文学中心天文计算研究所）；Space Telescope Science Institute（太空望远镜科学研究所）；New York University Abu Dhabi（纽约大学阿布扎比分校）；Universidad Diego Portales（迭戈波塔莱斯大学）；Universidad de Chile（智利大学）；Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México（墨西哥国立自治大学射电天文学与天体物理研究所）；Observatories of the Carnegie Institution for Science（卡内基科学机构天文台）；Departamento de Astronomía, Universidad de Chile（智利大学天文学系）；Department of Astronomy, University of Illinois at Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校天文学系）
SDSS-V LVM: Detectability of Wolf-Rayet stars and their He II ionizing flux in low-metallicity environments I. The weak-lined, early-type WN3 stars in the SMC
Payne4GAIN: NLTE Corrections for Red Giants in Milky Way Mapper using H-Band Neural Network Emulators
University of Chicago（芝加哥大学）；Kavli Institute for Cosmological Physics, University of Chicago（芝加哥大学卡弗里宇宙物理学研究所）；Joint Institute for Nuclear Astrophysics（联合核天体物理研究所）；Max-Planck-Institut für Astronomie（马克斯·普朗克天文学研究所）；Heidelberg University（海德堡大学）；University of Florida（佛罗里达大学）；The Ohio State University（俄亥俄州立大学）；Center for Computational Astrophysics, Flatiron Institute（平顿研究所计算天体物理中心）；Monash University（蒙纳士大学）；University of Colorado（科罗拉多大学）；Universidad Bernardo O’Higgins（贝尔纳多·奥希金斯大学）
