ARMADA: A Unique Hunt for Exoplanets and Low-Mass Companions around Hot Stars

ARMADA：对热恒星周围系外行星和低质量伴星的独特搜寻

• 批准号: 2009489
• 负责人: John Monnier
• 金额: $ 37.31万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2009489&HistoricalAwards=false
• 关键词: ARMADA; Unique; Hunt; Exoplanets; Low

Most known exoplanets have been discovered either through the decrease in starlight when planets transit in front of a star (from our perspective) or through Doppler wavelength shifts in the stellar spectrum. This team will apply a completely different method: imaging a star to determine its wobble due to the tug of a planet as it orbits. The team will use the CHARA and ESO’s VLTI optical interferometry arrays to observe 70 different binary star systems. This is a population of exoplanets that is unlikely to be detectable with other methods. This program will provide the basis for a graduate student to complete a PhD thesis. The team will conduct novel outreach activities through a traveling display in rural Michigan and at NASCAR events.The team will conduct a survey of 70 binary hot star (mass 1 solar mass) systems to search for massive exoplanets and companion brown dwarfs at orbits of approximately 1 AU. This ARMADA survey will use optical interferometry with the CHARA array in the Northern Hemisphere and ESO’s VLTI array in the Southern Hemisphere to detect stellar wobble due to orbiting massive exoplanets. Their survey will include different separation distances between binary stars in order to examine how binarity might suppress or enhance planet formation as a function of stellar separation of the pair. They will also survey trinary systems for potential exoplanet and low-mass brown dwarf companions.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.

当行星在恒星面前（从我们的角度）或通过恒星频谱中的多普勒波长变化时，最著名的系外星星是通过星光下降而发现的。该团队将采用一种完全不同的方法：成像恒星以确定其旋转行星的拖船，以确定其摇摆。该团队将使用Chara和Eso的VLTI光学干扰阵列观察70个不同的二元星系。这是一群系外行星，不可能通过其他方法检测到。该计划将为研究生完成博士学位论文提供基础。该团队将通过在密歇根州Rough和NASCAR活动中的旅行展览进行新颖的外展活动。该团队将对70个二进制热星（Mass 1太阳能质量）系统进行调查，以在大约1个AU的轨道上寻找大型系外行星和伴侣棕色矮人。该舰队的调查将使用北半球的Chara阵列和ESO在南半球的VLTI阵列中使用光学干涉法，以检测由于横向巨大的外部球星引起的恒星摇摆。他们的调查将包括二进制恒星之间的不同分离距离，以检查二进制性如何抑制或增强行星的形成，这是两对恒星分离的函数。他们还将对潜在系外行星和低质量的棕色矮人伴侣进行调查。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，通过评估诚实地表示支持。

项目成果

Interferometric Detections of sdO Companions Orbiting Three Classical Be Stars

• DOI: 10.3847/1538-4357/ac4266
• 发表时间: 2021-12
• 期刊: The Astrophysical Journal
• 作者: R. Klement;G. Schaefer;D. Gies;L. Wang;D. Baade;T. Rivinius;A. Gallenne;A. Carciofi;J. Monnier;A. M'erand;N. Anugu;S. Kraus;C. Davies;C. Lanthermann;T. Gardner;P. Wysocki;J. Ennis;A. Labdon;B. Setterholm;J. L. Bouquin

Establishing α Oph as a Prototype Rotator: Precision Orbit with New Keck, CHARA, and RV Observations

建立 α Oph 作为原型旋转器：具有新 Keck、CHARA 和 RV 观测的精密轨道

• DOI: 10.3847/1538-4357/ac1172
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Gardner, Tyler;Monnier, John D.;Fekel, Francis C.;Williamson, Michael;Baron, Fabien;Hinkley, Sasha;Ireland, Michael;Kraus, Adam L.;Kraus, Stefan;Roettenbacher, Rachael M.
• 通讯作者: Roettenbacher, Rachael M.

A thesis to probe unique exoplanet regimes with micro-arcsecond astrometry and precision closure phases at CHARA and VLTI

一篇利用 CHARA 和 VLTI 的微弧秒天体测量和精确闭合相位探测独特系外行星状态的论文

• DOI: 10.1117/12.2630035
• 发表时间: 2022
• 期刊: Proceedings of the SPIE
• 作者: Gardner, Tyler;Monnier, John D.;Fekel, Francis C.;Le Bouquin, Jean-Baptiste;Scovera, Adam;Schaefer, Gail;Kraus, Stefan;Adams, Fred C.;Anugu, Narsireddy;Beltz, Hayley
• 通讯作者: Beltz, Hayley

Direct discovery of the inner exoplanet in the HD 206893 system: Evidence for deuterium burning in a planetary-mass companion

HD 206893系统中直接发现内系外行星：行星质量伴星中氘燃烧的证据

• DOI: 10.1051/0004-6361/202244727
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Hinkley, S.;Lacour, S.;Marleau, G.-D.;Lagrange, A.-M.;Wang, J. J.;Kammerer, J.;Cumming, A.;Nowak, M.;Rodet, L.;Stolker, T.
• 通讯作者: Stolker, T.

ARMADA. II. Further Detections of Inner Companions to Intermediate-mass Binaries with Microarcsecond Astrometry at CHARA and VLTI

• DOI: 10.3847/1538-3881/ac8eae
• 发表时间: 2022-09
• 期刊: The Astronomical Journal
• 作者: T. Gardner;J. Monnier;F. Fekel;J. L. Bouquin;Adam Scovera;G. Schaefer;S. Kraus;F. Adams;N. Anugu;J. Berger;T. Brummelaar;C. Davies;J. Ennis;D. Gies;K. Johnson;P. Kervella;K. Kratter;A. Labdon;C. Lanthermann;J. Sahlmann;Benjamin R. Setterholm Univ. of Michigan;Tennessee State University;U. G. Alpes;The Chara Array;U. Exeter;U. Michigan;U. Wisconsin;O. Paris;U. Arizona;E. Observatory;European Space Astronomy Center