The Astronomical Journal (Jan 2024)
Two Earth-size Planets and an Earth-size Candidate Transiting the nearby Star HD 101581
- Michelle Kunimoto,
- Zifan Lin,
- Sarah Millholland,
- Alexander Venner,
- Natalie R. Hinkel,
- Avi Shporer,
- Andrew Vanderburg,
- Jeremy Bailey,
- Rafael Brahm,
- Jennifer A. Burt,
- R. Paul Butler,
- Brad Carter,
- David R. Ciardi,
- Karen A. Collins,
- Kevin I. Collins,
- Knicole D. Colón,
- Jeffrey D. Crane,
- Tansu Daylan,
- Matías R. Díaz,
- John P. Doty,
- Fabo Feng,
- Eike W. Guenther,
- Jonathan Horner,
- Steve B. Howell,
- Jan Janik,
- Hugh R. A. Jones,
- Petr Kabáth,
- Shubham Kanodia,
- Colin Littlefield,
- Hugh P. Osborn,
- Simon O’Toole,
- Martin Paegert,
- Pavel Pintr,
- Richard P. Schwarz,
- Steve Shectman,
- Gregor Srdoc,
- Keivan G. Stassun,
- Johanna K. Teske,
- Joseph D. Twicken,
- Leonardo Vanzi,
- Sharon X. Wang,
- Robert A. Wittenmyer,
- Jon M. Jenkins,
- George R. Ricker,
- Sara Seager,
- Joshua Winn
Affiliations
- Michelle Kunimoto
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]; Department of Physics and Astronomy, University of British Columbia , 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
- Zifan Lin
- ORCiD
- Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Sarah Millholland
- ORCiD
- Department of Physics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Alexander Venner
- ORCiD
- University of Southern Queensland , Centre for Astrophysics, USQ Toowoomba, West Street, QLD 4350, Australia
- Natalie R. Hinkel
- ORCiD
- Physics & Astronomy Department, Louisiana State University , Baton Rouge, LA 70803, USA
- Avi Shporer
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Andrew Vanderburg
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Jeremy Bailey
- ORCiD
- School of Physics, University of New South Wales , Sydney, NSW 2052, Australia
- Rafael Brahm
- ORCiD
- Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez , Avenida Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Millennium Institute for Astrophysics , Chile; Data Observatory Foundation , Chile
- Jennifer A. Burt
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
- R. Paul Butler
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA
- Brad Carter
- ORCiD
- University of Southern Queensland , Centre for Astrophysics, USQ Toowoomba, West Street, QLD 4350, Australia
- David R. Ciardi
- ORCiD
- Caltech/IPAC-NExScI , M/S 100-22, 770 S Wilson Avenue, Pasadena, CA 91106, USA
- Karen A. Collins
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Kevin I. Collins
- ORCiD
- George Mason University, 4400 University Drive , Fairfax, VA, 22030, USA
- Knicole D. Colón
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Jeffrey D. Crane
- ORCiD
- The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street , Pasadena, CA 91101, USA
- Tansu Daylan
- ORCiD
- Department of Physics and McDonnell Center for the Space Sciences, Washington University , St. Louis, MO 63130, USA
- Matías R. Díaz
- ORCiD
- Las Campanas Observatory, Carnegie Institution of Washington , Colina El Pino, Casilla 601 La Serena, Chile
- John P. Doty
- Noqsi Aerospace Ltd. , 15 Blanchard Avenue, Billerica, MA 01821, USA
- Fabo Feng
- ORCiD
- Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 201210, People's Republic of China
- Eike W. Guenther
- ORCiD
- Thueringer Landessternwarte Tautenburg , Sternwarte 5, 07778 Tautenburg, Germany
- Jonathan Horner
- ORCiD
- University of Southern Queensland , Centre for Astrophysics, USQ Toowoomba, West Street, QLD 4350, Australia
- Steve B. Howell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Jan Janik
- ORCiD
- Department of Theoretical Physics and Astrophysics, Faculty of Science, Masaryk University , Kotlařská 2, CZ-611 37, Brno, Czech Republic
- Hugh R. A. Jones
- Centre for Astrophysics Research, University of Hertfordshire , Hatfield AL10 9AB, UK
- Petr Kabáth
- ORCiD
- Astronomical Institute of the Czech Academy of Sciences , Fričova 298, 25165, Ondřejov, Czech Republic
- Shubham Kanodia
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA
- Colin Littlefield
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA; Bay Area Environmental Research Institute , Moffett Field, CA 94035, USA
- Hugh P. Osborn
- ORCiD
- Physikalisches Institut, University of Bern , Gesellsschaftstrasse 6, 3012 Bern, Switzerland; Department of Physics , ETH Zurich, Wolfgang-Pauli-Strasse 2, CH-8093 Zurich, Switzerland
- Simon O’Toole
- ORCiD
- Australian Astronomical Optics, macquarie University , North Ryde, NSW 1670, Australia
- Martin Paegert
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Pavel Pintr
- Institute of Plasma Physics of Czech Academy of Sciences , U Slovanky 2525/1a, 182 00 Praha 8, Czech Republic
- Richard P. Schwarz
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Steve Shectman
- ORCiD
- The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street , Pasadena, CA 91101, USA
- Gregor Srdoc
- Kotizarovci Observatory , Sarsoni 90, 51216 Viskovo, Croatia
- Keivan G. Stassun
- ORCiD
- Department of Physics and Astronomy, Vanderbilt University , Nashville, TN 37235, USA
- Johanna K. Teske
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA; Carnegie Institution for Science & The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Joseph D. Twicken
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA; SETI Institute , Mountain View, CA 94043, USA
- Leonardo Vanzi
- Department of Electrical Engineering and Centre of Astro-Engineering, Pontificia Universidad Catolica de Chile , Avenida Vicuña Mackenna 4860, Santiago, Chile
- Sharon X. Wang
- ORCiD
- Department of Astronomy, Tsinghua University , Beijing 100084, People’s Republic of China
- Robert A. Wittenmyer
- ORCiD
- University of Southern Queensland , Centre for Astrophysics, USQ Toowoomba, West Street, QLD 4350, Australia
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- George R. Ricker
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Sara Seager
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Joshua Winn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08540, USA
- DOI
- https://doi.org/10.3847/1538-3881/ad9266
- Journal volume & issue
-
Vol. 169,
no. 1
p. 47
Abstract
We report the validation of multiple planets transiting the nearby ( d = 12.8 pc) K5V dwarf HD 101581 (GJ 435, TOI–6276, TIC 397362481). This system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion resonance, HD 101581 b ( ${R}_{p}={0.956}_{-0.061}^{+0.063}\,{R}_{\oplus }$ , P = 4.47 days) and HD 101581c ( ${R}_{p}={0.990}_{-0.070}^{+0.070}\,{R}_{\oplus }$ , P = 6.21 days). Both planets were discovered in Sectors 63 and 64 TESS observations and statistically validated with supporting ground-based follow-up. We also identify a signal that probably originates from a third transiting planet, TOI-6276.03 ( ${R}_{p}={0.982}_{-0.098}^{+0.114}\,{R}_{\oplus }$ , P = 7.87 days). These planets are remarkably uniform in size and their orbits are evenly spaced, representing a prime example of the “peas-in-a-pod” architecture seen in other compact multiplanet systems. At V = 7.77, HD 101581 is the brightest star known to host multiple transiting planets smaller than 1.5 R _⊕ . HD 101581 is a promising system for atmospheric characterization and comparative planetology of small planets.
Keywords
