The Astrophysical Journal Letters (Jan 2023)
A Second Earth-sized Planet in the Habitable Zone of the M Dwarf, TOI-700
- Emily A. Gilbert,
- Andrew Vanderburg,
- Joseph E. Rodriguez,
- Benjamin J. Hord,
- Matthew S. Clement,
- Thomas Barclay,
- Elisa V. Quintana,
- Joshua E. Schlieder,
- Stephen R. Kane,
- Jon M. Jenkins,
- Joseph D. Twicken,
- Michelle Kunimoto,
- Roland Vanderspek,
- Giada N. Arney,
- David Charbonneau,
- Maximilian N. Günther,
- Chelsea X. Huang,
- Giovanni Isopi,
- Veselin B. Kostov,
- Martti H. Kristiansen,
- David W. Latham,
- Franco Mallia,
- Eric E. Mamajek,
- Ismael Mireles,
- Samuel N. Quinn,
- George R. Ricker,
- Jack Schulte,
- S. Seager,
- Gabrielle Suissa,
- Joshua N. Winn,
- Allison Youngblood,
- Aldo Zapparata
Affiliations
- Emily A. Gilbert
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA ; [email protected]
- Andrew Vanderburg
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Joseph E. Rodriguez
- ORCiD
- Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, USA
- Benjamin J. Hord
- ORCiD
- University of Maryland , College Park, MD 20742, USA; NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Matthew S. Clement
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, NW, Washington, DC 20015, USA; Johns Hopkins APL , 11100 Johns Hopkins Rd, Laurel, MD 20723, USA
- Thomas Barclay
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA; University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
- Elisa V. Quintana
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Joshua E. Schlieder
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Stephen R. Kane
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Joseph D. Twicken
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA; SETI Institute , Mountain View, CA 94043, USA
- Michelle Kunimoto
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Roland Vanderspek
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Giada N. Arney
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA; GSFC Sellers Exoplanet Environments Collaboration, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
- David Charbonneau
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Maximilian N. Günther
- ORCiD
- European Space Agency (ESA), European Space Research and Technology Centre (ESTEC) , Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
- Chelsea X. Huang
- ORCiD
- University of Southern Queensland , West St, Darling Heights, Toowoomba, Queensland, 4350, Australia
- Giovanni Isopi
- ORCiD
- Campo Catino Astronomical Observatory , Regione Lazio, Guarcino (FR), I-03010 Italy
- Veselin B. Kostov
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA; SETI Institute , Mountain View, CA 94043, USA
- Martti H. Kristiansen
- ORCiD
- Brorfelde Observatory , Observator Gyldenkernes Vej 7, DK-4340 Tølløse, Denmark
- David W. Latham
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St, Cambridge, MA, 02138, USA
- Franco Mallia
- ORCiD
- Campo Catino Astronomical Observatory , Regione Lazio, Guarcino (FR), I-03010 Italy
- Eric E. Mamajek
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA ; [email protected]
- Ismael Mireles
- ORCiD
- Department of Physics and Astronomy, University of New Mexico , 210 Yale Blvd NE, Albuquerque, NM 87106, USA
- Samuel N. Quinn
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St, Cambridge, MA, 02138, USA
- George R. Ricker
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Jack Schulte
- ORCiD
- Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, USA
- S. 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
- Gabrielle Suissa
- ORCiD
- Department of Astronomy and Astrobiology Program, University of Washington , Box 351580, Seattle, Washington 98195, USA
- Joshua N. Winn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USA
- Allison Youngblood
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Aldo Zapparata
- ORCiD
- Campo Catino Astronomical Observatory , Regione Lazio, Guarcino (FR), I-03010 Italy
- DOI
- https://doi.org/10.3847/2041-8213/acb599
- Journal volume & issue
-
Vol. 944,
no. 2
p. L35
Abstract
We report the discovery of TOI-700 e, a 0.95 R _⊕ planet residing in the Optimistic Habitable Zone (HZ) of its host star. This discovery was enabled by multiple years of monitoring from NASA’s Transiting Exoplanet Survey Satellite (TESS) mission. The host star, TOI-700 (TIC 150428135), is a nearby (31.1 pc), inactive, M2.5 dwarf ( V _mag = 13.15). TOI-700 is already known to host three planets, including the small, HZ planet, TOI-700 d. The new planet has an orbital period of 27.8 days, and based on its radius (0.95 R _⊕ ), it is likely rocky. TOI-700 was observed for 21 sectors over Years 1 and 3 of the TESS mission, including 10 sectors at 20 s cadence in Year 3. Using this full set of TESS data and additional follow-up observations, we identify, validate, and characterize TOI-700 e. This discovery adds another world to the short list of small, HZ planets transiting nearby and bright host stars. Such systems, where the stars are bright enough that follow-up observations are possible to constrain planet masses and atmospheres using current and future facilities, are incredibly valuable. The presence of multiple small, HZ planets makes this system even more enticing for follow-up observations.
Keywords
