TESS DISCOVERY OF A TRANSITING SUPER-EARTH IN THE π MENSAE SYSTEM

Chelsea X Huang; Jennifer Burt; Andrew Vanderburg; Maximilian N Günther; Avi Shporer; Jason A Dittmann; Joshua N Winn; Rob Wittenmyer; Lizhou Sha; Stephen R Kane; George R Ricker; Roland K Vanderspek; David W Latham; Sara Seager; Jon M Jenkins; Douglas A Caldwell; Karen A Collins; Natalia Guerrero; Jeffrey C Smith; Samuel N Quinn; Stéphane Udry; Francesco Pepe; François Bouchy; Damien Ségransan; Christophe Lovis; David Ehrenreich; Maxime Marmier; Michel Mayor; Bill Wohler; Kari Haworth; Edward H Morgan; Michael Fausnaugh; David R Ciardi; Jessie Christiansen; David Charbonneau; Diana Dragomir; Drake Deming; Ana Glidden; Alan M Levine; P R McCullough; Liang Yu; Norio Narita; Tam Nguyen; Tim Morton; Joshua Pepper; András Pál; Joseph E Rodriguez; TESS team

doi:10.3847/2041-8213/aaef91

TESS DISCOVERY OF A TRANSITING SUPER-EARTH IN THE π MENSAE SYSTEM

Astrophys J Lett. 2018 Dec 1;868(2):10.3847/2041-8213/aaef91. doi: 10.3847/2041-8213/aaef91. Epub 2018 Nov 30.

Authors

Chelsea X Huang^{1

2}, Jennifer Burt^{1

2}, Andrew Vanderburg^{3

4}, Maximilian N Günther^{1

2}, Avi Shporer¹, Jason A Dittmann^{5

6}, Joshua N Winn⁷, Rob Wittenmyer⁸, Lizhou Sha¹, Stephen R Kane⁹, George R Ricker¹, Roland K Vanderspek¹, David W Latham¹⁰, Sara Seager^{1

6}, Jon M Jenkins¹¹, Douglas A Caldwell^{11

12}, Karen A Collins¹⁰, Natalia Guerrero¹, Jeffrey C Smith¹², Samuel N Quinn¹¹, Stéphane Udry¹³, Francesco Pepe¹³, François Bouchy¹³, Damien Ségransan¹³, Christophe Lovis¹³, David Ehrenreich¹³, Maxime Marmier¹³, Michel Mayor¹³, Bill Wohler^{11

12}, Kari Haworth¹, Edward H Morgan¹, Michael Fausnaugh¹, David R Ciardi¹⁴, Jessie Christiansen¹⁴, David Charbonneau¹⁰, Diana Dragomir^{1

15}, Drake Deming¹⁶, Ana Glidden^{1

6}, Alan M Levine¹, P R McCullough¹⁷, Liang Yu¹, Norio Narita^{18

19

20

21

22}, Tam Nguyen¹, Tim Morton⁷, Joshua Pepper²³, András Pál^{1

24

25}, Joseph E Rodriguez¹⁰; TESS team

Affiliations

¹ Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
² Juan Carlos Torres Fellow.
³ Department of Astronomy, The University of Texas at Austin, Austin, TX 78712, USA.
⁴ NASA Sagan Fellow.
⁵ 51 Pegasi b Postdoctoral Fellow.
⁶ Earth and Planetary Sciences, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
⁷ Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA.
⁸ University of Southern Queensland, West St, Darling Heights QLD 4350, Australia.
⁹ Department of Earth Sciences, University of California, Riverside, CA 92521, USA.
¹⁰ Harvard-Smithsonian Center for Astrophysics, Harvard University, Cambridge, MA 02138, USA.
¹¹ NASA Ames Research Center, Moffett Field, CA, 94035.
¹² SETI Institute, Mountain View, CA 94043, USA.
¹³ Observatoire de l'Université de Genève, 51 chemin des Maillettes, 1290 Versoix, Switzerland.
¹⁴ NASA Exoplanet Science Institute, Caltech/IPAC-NExScI 1200 East California Boulevard Pasadena, CA 91125.
¹⁵ NASA Hubble Fellow.
¹⁶ Department of Astronomy, University of Maryland at College Park, College Park MD, 20742.
¹⁷ Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA.
¹⁸ Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
¹⁹ Astrobiology Center, National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
²⁰ JST, PRESTO, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
²¹ Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain.
²² National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
²³ Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015, USA.
²⁴ Department of Astronomy, Loránd Eötvös University, Pázmány P. stny. 1/A, Budapest H-1117, Hungary.
²⁵ Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary.

Abstract

We report the detection of a transiting planet around π Men (HD 39091), using data from the Transiting Exoplanet Survey Satellite (TESS). The solar-type host star is unusually bright (V = 5.7) and was already known to host a Jovian planet on a highly eccentric, 5.7-year orbit. The newly discovered planet has a size of 2.04 ± 0.05 R _⊕ and an orbital period of 6.27 days. Radial-velocity data from the HARPS and AAT/UCLES archives also displays a 6.27-day periodicity, confirming the existence of the planet and leading to a mass determination of 4.82±0.85 M _⊕. The star's proximity and brightness will facilitate further investigations, such as atmospheric spectroscopy, asteroseismology, the Rossiter-McLaughlin effect, astrometry, and direct imaging.

Keywords: planetary systems; planets and satellites: detection; stars: individual (HD 39091, TIC 261136679).

Grants and funding

N-999999/Intramural NASA/United States