TESS Discovery of a Transiting Super-Earth in the pi Mensae System

Chelsea X. Huang(Massachusetts Institute of Technology), Jennifer Burt(Massachusetts Institute of Technology), Andrew Vanderburg(The University of Texas at Austin), Maximilian N. Günther(Massachusetts Institute of Technology), Avi Shporer(Massachusetts Institute of Technology), Jason Dittmann(Planetary Science Institute), Joshua N. Winn(Princeton University), Rob Wittenmyer(University of Southern Queensland), Lizhou Sha(Massachusetts Institute of Technology), Stephen R. Kane(University of California, Riverside), G. Ricker(Massachusetts Institute of Technology), R. Vanderspek(Massachusetts Institute of Technology), David W. Latham(Harvard University), Sara Seager(Planetary Science Institute), Jon M. Jenkins(Ames Research Center), Douglas A. Caldwell(Ames Research Center), Karen A. Collins(Harvard University), Natalia Guerrero(Massachusetts Institute of Technology), Jeffrey C. Smith(Search for Extraterrestrial Intelligence), Samuel N. Quinn(Ames Research Center), S. Udry(University of Geneva), F. Pepe(University of Geneva), F. Bouchy(University of Geneva), D. Ségransan(University of Geneva), C. Lovis(University of Geneva), D. Ehrenreich(University of Geneva), M. Marmier(University of Geneva), M. Mayor(University of Geneva), Bill Wohler(Ames Research Center), Kari Haworth(Massachusetts Institute of Technology), E. Morgan(Massachusetts Institute of Technology), Michael Fausnaugh(Massachusetts Institute of Technology), David R. Ciardi(California Institute of Technology), Jessie L. Christiansen(California Institute of Technology), David Charbonneau(Harvard University), Diana Dragomir(Massachusetts Institute of Technology), Drake Deming(University of Maryland, College Park), Ana Glidden(Planetary Science Institute), Alan M. Levine(Massachusetts Institute of Technology), P. R. McCullough(Johns Hopkins University), Liang Yu(Massachusetts Institute of Technology), Norio Narita(Astrobiology Center), Tam T. Nguyen(Massachusetts Institute of Technology), Tim Morton(Princeton University), Joshua Pepper(Lehigh University), András Pál(Eötvös Loránd University), Joseph E. Rodriguez(Harvard University), Keivan G. Stassun(Vanderbilt University), Guillermo Torres(Center for Astrophysics Harvard & Smithsonian), A. Sozzetti(Osservatorio Astrofisico di Torino), J. Doty, J. Christensen‐Dalsgaard(Aarhus University), Gregory Laughlin(Yale University), Mark Clampin(Goddard Space Flight Center), Jacob L. Bean(University of Chicago), Lars A. Buchhave(Technical University of Denmark), G. Á. Bakos(Princeton University), Bun’ei Sato(Tokyo Institute of Technology), Shigeru Ida(Tokyo Institute of Technology), Lisa Kaltenegger(Cornell University), Ε. Πάλλη(Instituto de Astrofísica de Canarias), Dimitar Sasselov(Center for Astrophysics Harvard & Smithsonian), R. Paul Butler(Carnegie Institution for Science), Jack J. Lissauer(Ames Research Center), Jian Ge(University of Florida), Stephen A. Rinehart(Goddard Space Flight Center)
University of Southern Queensland ePrints (University of Southern Queensland)
January 1, 2018
Cited by 101Open Access
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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.

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