Collaborative Research: Adding a Magnetic Dimension to M-dwarf Stars Observed by APOGEE

合作研究：为 APOGEE 观测到的 M 矮星添加磁维度

• 批准号: 2009507
• 负责人: Katia Cunha
• 金额: $ 27.74万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2009507&HistoricalAwards=false
• 关键词: Collaborative; Research; Adding; Magnetic; Dimension

M-dwarf stars are, by far, the most numerous type of star in the Milky Way, and they represent an important family of exoplanet hosts. In addition, their lifetimes exceed the age of the Galaxy itself, so detailed chemical abundance studies of large samples of M-dwarfs will yield important insights into Galactic history. This team will measure magnetic field strengths in a sample of ~30,000 M-dwarfs that have been observed as part of the APOGEE (Apache Point Observatory Galactic Evolution Experiment) survey. They will participate as mentors in the Sloan Foundation's Faculty and Student Team (FaST) initiative, which targets faculty and students at U.S. institutions with strong histories in serving underrepresented minority students. Faculty/student teams from these institutions are matched to established Sloan Digital Sky Survey partners or collaborators. The APOGEE spectral region, between 1.5 - 1.7 microns, observed at high resolution, contains significant diagnostic information for M-dwarfs, such as detailed chemical abundance patterns, as well as the possibility to detect stellar magnetic fields via Zeeman split or Zeeman enhanced lines. This team will develop the techniques necessary to derive accurate stellar parameters (effective temperatures and surface gravities), as well as detailed chemical abundances, while including magnetic Zeeman splitting in the analysis. This will result in the addition of a magnetic activity dimension for the M-dwarfs in the APOGEE survey, sampling a population of M-dwarfs covering a broad range in effective temperatures, metallicities and ages, and including a large number of exoplanet-hosting M-dwarfs. This more encompassing view of the M-dwarf population will advance knowledge and understanding across the broad field of cool-star astrophysics, in general, while also providing knowledge about stellar magnetic fields in a sample of exoplanet-hosting M-dwarfs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

到目前为止，M-Dwarf的明星是银河系中众多类型的恒星，它们代表了一个重要的系外行星宿主家族。此外，它们的寿命超过了银河系本身的年龄，因此对大型M型武器样本的详细化学丰度研究将对银河系历史产生重要的见解。该团队将测量约30,000 m少量的样品中的磁场强度，这些样品已被观察到是Apogee的一部分（Apache Point天文台银河发展实验）。他们将担任斯隆基金会的教职员工（FAST）倡议的导师，该倡议针对美国机构的教职员工和学生，在为代表性不足的少数民族学生提供服务方面有很强的历史。这些机构的教师/学生团队与已建立的Sloan Digital Sky Survey Partners或合作者相匹配。在高分辨率下观察到的1.5-1.7微米之间的座位光谱区域包含M型少量的重要诊断信息，例如详细的化学丰度模式，以及通过Zeeman Split或Zeeman Split或Zeeman split的恒星磁场的可能性。该团队将开发必要的技术，以得出准确的恒星参数（有效的温度和表面重力）以及详细的化学丰度，同时包括分析中的磁性Zeeman分裂。这将导致在高等调查中增加M型武器的磁性活性维度，对有效温度，金属性和年龄的范围广泛的M-warf进行了采样，并包括大量的外部甲壳虫供应的M-dwarfs。 M-dwarf人群的这种更具包含的观点将在整个酷星天体物理学的广泛领域中提高知识和理解，同时还提供有关托管磁场的知识，在系属于M-warf的样本中，该奖项反映了NSF的法定任务，并通过评估了基金会的智力效果。

项目成果

A Metallicity Study of F, G, K, and M Dwarfs in the Coma Berenices Open Cluster from the APOGEE Survey

• DOI: 10.3847/1538-4357/abfdb5
• 发表时间: 2021-05
• 期刊: The Astrophysical Journal
• 作者: D. Souto;K. Cunha;V. Smith

Rotational Modulation of Spectroscopic Zeeman Signatures in Low-mass Stars

低质量恒星光谱塞曼特征的旋转调制

• DOI: 10.3847/2041-8213/ac4fc8
• 发表时间: 2022
• 期刊: The Astrophysical Journal Letters
• 作者: Terrien, Ryan C.;Keen, Allison;Oda, Katy;Stefánsson, Guðmundur;Mahadevan, Suvrath;Robertson, Paul;Ninan, Joe P.;Beard, Corey;Bender, Chad F.
• 通讯作者: Bender, Chad F.

Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey

APOGEE 巡天 M 矮星基准样本的详细化学丰度

• DOI: 10.3847/1538-4357/ac4891
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Souto, Diogo;Cunha, Katia;Smith, Verne V.;Prieto, C. Allende;Covey, Kevin;García-Hernández, D. A.;Holtzman, Jon A.;Jönsson, Henrik;Mahadevan, Suvrath;Majewski, Steven R.
• 通讯作者: Majewski, Steven R.

Stellar Characterization and Radius Inflation of Hyades M-dwarf Stars from the APOGEE Survey

• DOI: 10.3847/1538-4357/acd4bd
• 发表时间: 2023-05
• 期刊: The Astrophysical Journal
• 作者: Fábio Wanderley;K. Cunha;D. Souto;V. Smith;L. Cao;M. Pinsonneault;C. Allende Prieto;K. Covey;T. Masseron;I. Pascucci;K. Stassun;R. Terrien;Galen J. Bergsten;D. Bizyaev;Jos'e G. Fern'andez-Trincado;H. Jönsson;S. Hasselquist;J. Holtzman;R. Lane;S. Mahadevan;S. Majewski;D. Minniti;K. Pan;J. Serna;J. Sobeck;G. Stringfellow

The APOGEE Data Release 16 Spectral Line List

APOGEE 数据发布 16 谱线列表

• DOI: 10.3847/1538-3881/abefdc
• 发表时间: 2021
• 期刊: The Astronomical Journal
• 作者: Smith, Verne V.;Bizyaev, Dmitry;Cunha, Katia;Shetrone, Matthew D.;Souto, Diogo;Allende Prieto, Carlos;Masseron, Thomas;Mészáros, Szabolcs;Jönsson, Henrik;Hasselquist, Sten
• 通讯作者: Hasselquist, Sten