The Astronomical Journal (Jan 2024)
Planet Hunters TESS. V. A Planetary System Around a Binary Star, Including a Mini-Neptune in the Habitable Zone
- Nora L. Eisner,
- Samuel K. Grunblatt,
- Oscar Barragán,
- Thea H. Faridani,
- Chris Lintott,
- Suzanne Aigrain,
- Cole Johnston,
- Ian R. Mason,
- Keivan G. Stassun,
- Megan Bedell,
- Andrew W. Boyle,
- David R. Ciardi,
- Catherine A. Clark,
- Guillaume Hebrard,
- David W. Hogg,
- Steve B. Howell,
- Baptiste Klein,
- Joe Llama,
- Joshua N. Winn,
- Lily L. Zhao,
- Joseph M. Akana Murphy,
- Corey Beard,
- Casey L. Brinkman,
- Ashley Chontos,
- Pia Cortes-Zuleta,
- Xavier Delfosse,
- Steven Giacalone,
- Emily A. Gilbert,
- Neda Heidari,
- Rae Holcomb,
- Jon M. Jenkins,
- Flavien Kiefer,
- Jack Lubin,
- Eder Martioli,
- Alex S. Polanski,
- Nicholas Saunders,
- Sara Seager,
- Avi Shporer,
- Dakotah Tyler,
- Judah Van Zandt,
- Safaa Alhassan,
- Daval J. Amratlal,
- Lais I. Antonel,
- Simon L. S. Bentzen,
- Milton K. D Bosch,
- David Bundy,
- Itayi Chitsiga,
- Jérôme F. Delaunay,
- Xavier Doisy,
- Richard Ferstenou,
- Mark Fynø,
- James M. Geary,
- Gerry Haynaly,
- Pete Hermes,
- Marc Huten,
- Sam Lee,
- Paul Metcalfe,
- Garry J. Pennell,
- Joanna Puszkarska,
- Thomas Schäfer,
- Lisa Stiller,
- Christopher Tanner,
- Allan Tarr,
- Andrew Wilkinson
Affiliations
- Nora L. Eisner
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA; Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USA
- Samuel K. Grunblatt
- ORCiD
- Department of Physics and Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Oscar Barragán
- ORCiD
- Oxford Astrophysics, Denys Wilkinson Building, University of Oxford , OX1 3RH, Oxford, UK
- Thea H. Faridani
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095, USA
- Chris Lintott
- ORCiD
- Oxford Astrophysics, Denys Wilkinson Building, University of Oxford , OX1 3RH, Oxford, UK
- Suzanne Aigrain
- ORCiD
- Oxford Astrophysics, Denys Wilkinson Building, University of Oxford , OX1 3RH, Oxford, UK
- Cole Johnston
- ORCiD
- Radboud University Nijmegen , Department of Astrophysics, IMAPP, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
- Ian R. Mason
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Keivan G. Stassun
- ORCiD
- Vanderbilt University , Department of Physics & Astronomy, 6301 Stevenson Center Lane, Nashville, TN 37235, USA
- Megan Bedell
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Andrew W. Boyle
- ORCiD
- Department of Astronomy, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA
- David R. Ciardi
- ORCiD
- NASA Exoplanet Science Institute-Caltech/IPAC , Pasadena, CA 91350 USA
- Catherine A. Clark
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109 USA; NASA Exoplanet Science Institute , IPAC, California Institute of Technology, Pasadena, CA 91125 USA
- Guillaume Hebrard
- Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie , 98 bis boulevard Arago, F-75014 Paris, France; Observatoire de Haute-Provence, Université d’Aix-Marseille & CNRS , F-04870 Saint Michel l’Observatoire, France
- David W. Hogg
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Steve B. Howell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Baptiste Klein
- Oxford Astrophysics, Denys Wilkinson Building, University of Oxford , OX1 3RH, Oxford, UK
- Joe Llama
- ORCiD
- Lowell Observatory , 1400 Mars Hill Road, Flagstaff, AZ 86001, USA
- Joshua N. Winn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USA
- Lily L. Zhao
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Joseph M. Akana Murphy
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- Corey Beard
- ORCiD
- Department of Physics & Astronomy, The University of California , Irvine, Irvine, CA 92697, USA
- Casey L. Brinkman
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Ashley Chontos
- ORCiD
- Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USA
- Pia Cortes-Zuleta
- ORCiD
- Aix Marseille Univ , CNRS, CNES, LAM, Marseille, France
- Xavier Delfosse
- University Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, France
- Steven Giacalone
- ORCiD
- Department of Astronomy, University of California Berkeley , Berkeley, CA 94720, USA
- Emily A. Gilbert
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
- Neda Heidari
- Aix Marseille Univ , CNRS, CNES, LAM, Marseille, France
- Rae Holcomb
- ORCiD
- Department of Physics & Astronomy, The University of California , Irvine, Irvine, CA 92697, USA
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Flavien Kiefer
- ORCiD
- LESIA, Observatoire de Paris, Université PSL , CNRS, Sorbonne Université, Université Paris Cité, 5 place Jules Janssen, F-92195 Meudon, France; American University of Paris , 5, boulevard de La Tour-Maubourg F-75007 Paris, France
- Jack Lubin
- ORCiD
- Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Eder Martioli
- ORCiD
- Laboratório Nacional de Astrofísica , Rua Estados Unidos 154, 37504-364, Itajubá - MG, Brazil; Institut d’Astrophysique de Paris , CNRS, UMR 7095, Sorbonne Université, 98 bis bd Arago, F-75014 Paris, France
- Alex S. Polanski
- ORCiD
- Department of Physics and Astronomy, University of Kansas , Lawrence, KS, USA
- Nicholas Saunders
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Sara Seager
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , Cambridge, MA 02139, USA; Department of Aeronautics and Astronautics , MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Avi Shporer
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Dakotah Tyler
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095, USA
- Judah Van Zandt
- ORCiD
- Department of Physics and Astronomy, University of California , Los Angeles, CA 90095, USA
- Safaa Alhassan
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Daval J. Amratlal
- ORCiD
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Lais I. Antonel
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Simon L. S. Bentzen
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Milton K. D Bosch
- ORCiD
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- David Bundy
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Itayi Chitsiga
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Jérôme F. Delaunay
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Xavier Doisy
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Richard Ferstenou
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Mark Fynø
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- James M. Geary
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Gerry Haynaly
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Pete Hermes
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Marc Huten
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Sam Lee
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Paul Metcalfe
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Garry J. Pennell
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Joanna Puszkarska
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Thomas Schäfer
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Lisa Stiller
- ORCiD
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Christopher Tanner
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Allan Tarr
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- Andrew Wilkinson
- Citizen Scientist, Zooniverse c/o University of Oxford , Keble Road, Oxford OX1 3RH, UK
- DOI
- https://doi.org/10.3847/1538-3881/ad1d5c
- Journal volume & issue
-
Vol. 167,
no. 5
p. 241
Abstract
We report on the discovery and validation of a transiting long-period mini-Neptune orbiting a bright ( V = 9.0 mag) G dwarf (TOI 4633; R = 1.05 R _⊙ , M = 1.10 M _⊙ ). The planet was identified in data from the Transiting Exoplanet Survey Satellite by citizen scientists taking part in the Planet Hunters TESS project. Modelling of the transit events yields an orbital period of 271.9445 ± 0.0040 days and radius of 3.2 ± 0.20 R _⊕ . The Earth-like orbital period and an incident flux of ${1.56}_{-0.16}^{+0.20}$ F _⊕ places it in the optimistic habitable zone around the star. Doppler spectroscopy of the system allowed us to place an upper mass limit on the transiting planet and revealed a non-transiting planet candidate in the system with a period of 34.15 ± 0.15 days. Furthermore, the combination of archival data dating back to 1905 with new high angular resolution imaging revealed a stellar companion orbiting the primary star with an orbital period of around 230 yr and an eccentricity of about 0.9. The long period of the transiting planet, combined with the high eccentricity and close approach of the companion star makes this a valuable system for testing the formation and stability of planets in binary systems.
Keywords
