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

December 2018 • 2018ApJ...868L..39H

Authors • Huang, Chelsea X. • Burt, Jennifer • Vanderburg, Andrew • Günther, Maximilian N. • Shporer, Avi • Dittmann, Jason A. • Winn, Joshua N. • Wittenmyer, Rob • Sha, Lizhou • Kane, Stephen R. • Ricker, George R. • Vanderspek, Roland K. • Latham, David W. • Seager, Sara • Jenkins, Jon M. • Caldwell, Douglas A. • Collins, Karen A. • Guerrero, Natalia • Smith, Jeffrey C. • Quinn, Samuel N. • Udry, Stéphane • Pepe, Francesco • Bouchy, François • Ségransan, Damien • Lovis, Christophe • Ehrenreich, David • Marmier, Maxime • Mayor, Michel • Wohler, Bill • Haworth, Kari • Morgan, Edward H. • Fausnaugh, Michael • Ciardi, David R. • Christiansen, Jessie • Charbonneau, David • Dragomir, Diana • Deming, Drake • Glidden, Ana • Levine, Alan M. • McCullough, P. R. • Yu, Liang • Narita, Norio • Nguyen, Tam • Morton, Tim • Pepper, Joshua • Pál, András • Rodriguez, Joseph E. • Stassun, Keivan G. • Torres, Guillermo • Sozzetti, Alessandro • Doty, John P. • Christensen-Dalsgaard, Jørgen • Laughlin, Gregory • Clampin, Mark • Bean, Jacob L. • Buchhave, Lars A. • Bakos, G. Á. • Sato, Bun'ei • Ida, Shigeru • Kaltenegger, Lisa • Palle, Enric • Sasselov, Dimitar • Butler, R. P. • Lissauer, Jack • Ge, Jian • Rinehart, S. A.

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 yr 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 High-Accuracy Radial-velocity Planet Searcher and Anglo-Australian Telescope/University College London Echelle Spectrograph 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.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2018ApJ...868L..39H
• PDF https://iopscience.iop.org/article/10.3847/2041-8213/aaef91/pdf
• PDF https://stacks.iop.org/2041-8205/868/L39/pdf
• PREPRINT http://arxiv.org/abs/1809.05967
• DATA http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?type=REFERENCE&bibcode=2018ApJ...868L..39H
• DATA https://irsa.ipac.caltech.edu/bibdata/2018/H/2018ApJ...868L..39H.html
• ELECTR https://doi.org/10.3847%2F2041-8213%2Faaef91