TESS Hunt for Young and Maturing Exoplanets (THYME). IV. Three Small Planets Orbiting a 120 Myr Old Star in the Pisces–Eridanus StreamSometimes called Meingast-1.,The Astronomical Journal

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TESS Hunt for Young and Maturing Exoplanets (THYME). IV. Three Small Planets Orbiting a 120 Myr Old Star in the Pisces–Eridanus StreamSometimes called Meingast-1.
The Astronomical Journal ( IF 5.1 ) Pub Date : 2021-01-14 , DOI: 10.3847/1538-3881/abccc6
Elisabeth R. Newton ₁ , Andrew W. Mann ₂ , Adam L. Kraus ₃ , John H. Livingston ₄ , Andrew Vanderburg _{3,

5} , Jason L. Curtis ₆ , Pa Chia Thao ₂ , Keith Hawkins ₃ , Mackenna L. Wood ₂ , Aaron C. Rizzuto ₃ , Abderahmane Soubkiou ₇ , Benjamin M. Tofflemire ₃ , George Zhou ₈ , Ian J. M. Crossfield ₉ , Logan A. Pearce ₁₀ , Karen A. Collins ₈ , Dennis M. Conti ₁₁ , Thiam-Guan Tan ₁₂ , Steven Villeneuva ₁₃ , Alton Spencer ₁₄ , Diana Dragomir ₁₅ , Samuel N. Quinn ₈ , Eric L. N. Jensen ₁₆ , Kevin I. Collins ₁₇ , Chris Stockdale ₁₈ , Ryan Cloutier ₈ , Coel Hellier ₁₉ , Zouhair Benkhaldoun ₇ , Carl Ziegler ₂₀ , Csar Briceo ₂₁ , Nicholas Law ₂ , Bjrn Benneke ₂₂ , Jessie L. Christiansen ₂₃ , Varoujan Gorjian ₂₄ , Stephen R. Kane ₂₅ , Laura Kreidberg ₂₆ , Farisa Y. Morales ₂₇ , Michael W Werner ₂₃ , Joseph D. Twicken ₂₈ , Alan M. Levine ₁₃ , David R. Ciardi ₂₃ , Natalia M. Guerrero ₁₃ , Katharine Hesse ₁₃ , Elisa V. Quintana ₂₉ , Bernie Shiao ₃₀ , Jeffrey C. Smith ₂₈ , Guillermo Torres ₈ , George R. Ricker ₁₃ , Roland Vanderspek ₁₃ , Sara Seager _{13,

31,

32} , Joshua N. Winn ₃₃ , Jon M. Jenkins ₃₄ , David W. Latham ₈

Affiliation

Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, USA
Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
Department of Astronomy, The University of Texas at Austin, Austin, TX 78712, USA
Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
Department of Astrophysics, American Museum of Natural History, Central Park West, New York, NY, USA
Oukaimeden Observatory, PHEA Laboratory, Cadi Ayyad University, BP 2390 Marrakech, Morocco
Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA
Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
American Association of Variable Star Observers, 49 Bay State Road, Cambridge, MA 02138, USA
Perth Exoplanet Survey Telescope, Perth, Western Australia, Australia
Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Western Connecticut State University, Danbury, CT 06810, USA
Department of Physics and Astronomy, University of New Mexico, 210 Yale Boulevard NE, Albuquerque, NM 87106, USA
Department of Physics & Astronomy, Swarthmore College, Swarthmore PA 19081, USA
George Mason University, 4400 University Drive, Fairfax, VA 22030, USA
Hazelwood Observatory, Australia
Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada
Cerro Tololo Inter-American Observatory/NSF’s NOIRLab, Casilla 603, La Serena, Chile
Department of Physics and Institute for Research on Exoplanets, Universit de Montral, Montreal, QC, Canada
Caltech/IPAC-NASA Exoplanet Science Institute, 770 S. Wilson Avenue, Pasadena, CA 91106, USA
Caltech/NASA Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Department of Earth and Planetary Sciences, University of California, Riverside, CA 92521, USA
Max-Planck-Institut fr Astronomie , Knigstuhl 17, D-69117 Heidelberg, Germany
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
SETI Institute/NASA Ames Research Center, USA
NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
Mikulski Archive for Space Telescopes, USA
Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
NASA Ames Research Center, Moffett Field, CA 94035, USA

Young exoplanets can offer insight into the evolution of planetary atmospheres, compositions, and architectures. We present the discovery of the young planetary system TOI 451 (TIC 257605131, Gaia DR2 4844691297067063424). TOI 451 is a member of the 120 Myr old Pisces–Eridanus stream (Psc–Eri). We confirm membership in the stream with its kinematics, its lithium abundance, and the rotation and UV excesses of both TOI 451 and its wide-binary companion, TOI 451 B (itself likely an M-dwarf binary). We identified three candidate planets transiting in the Transiting Exoplanet Survey Satellite data and followed up the signals with photometry from Spitzer and ground-based telescopes. The system comprises three validated planets at periods of 1.9, 9.2, and 16 days, with radii of 1.9, 3.1, and 4.1 R _⨂, respectively. The host star is near-solar mass with V = 11.0 and H=9.3 and displays an infrared excess indicative of a debris disk. The planets offer excellent prospects for transmission spectroscopy with the Hubble Space Telescope and the James Webb Space Telescope, providing the opportunity to study planetary atmospheres that may still be in the process of evolving.

中文翻译：

TESS寻找年轻和成熟的系外行星（THYME）。IV。在双鱼座–厄立达努斯流中三个小行星绕着120 Myr老星运行有时称为Meingast-1。

年轻的系外行星可以洞悉行星大气，成分和建筑的演变。我们介绍了年轻的行星系统TOI 451（TIC 257605131，Gaia DR2 4844691297067063424）的发现。TOI 451是120 Myr的双鱼座–厄立达努斯流（Psc–Eri）的成员。我们通过其运动学，其锂丰度以及TOI 451及其宽二元伴侣TOI 451 B（它本身可能是M矮二元体）的旋转和紫外线过量来确认流中的成员。我们在“过渡系外行星调查卫星”数据中确定了三个正在过渡的候选行星，并用Spitzer和地基望远镜的光度法对这些信号进行了跟踪。该系统包括在1.9，9.2周期3个验证行星，和16天，1.9，3.1和4.1的半径ř _⨂，分别。宿主恒星质量接近太阳，V = 11.0，H = 9.3，并显示出红外过量，表明存在碎片盘。通过哈勃太空望远镜和詹姆斯·韦伯太空望远镜，这些行星为透射光谱学提供了极好的前景，为研究仍在演化中的行星大气提供了机会。

更新日期：2021-01-14

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