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

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 pla...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2018-12, Vol.868 (2), p.L39
Main 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.
Format: Article
Language:English
Subjects:
Archives & records
Astrometry
Eccentric orbits
Extrasolar planets
Periodic variations
Planet detection
Planetary orbits
planetary systems
planets and satellites: detection
Satellites
Spectroscopy
Star brightness
stars: individual (HD 39091, TIC 261136679)
Stellar seismology
Transit
Velocity
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Summary: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.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8213/aaef91