TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844

Roland Vanderspek, Chelsea X. Huang, Andrew Vanderburg, George R. Ricker, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Jennifer Burt, Jason Dittmann, Elisabeth Newton, Samuel N. Quinn, Avi Shporer, David Charbonneau, Jonathan Irwin, Kristo Ment, Jennifer G. Winters, Karen A. Collins, Phil Evans, Tianjun GanRhodes Hart, Eric L.N. Jensen, John Kielkopf, Shude Mao, William Waalkes, Francois Bouchy, Maxime Marmier, Louise D. Nielsen, Gaël Ottoni, Francesco Pepe, Damien Ségransan, Stéphane Udry, Todd Henry, Leonardo A. Paredes, Hodari Sadiki James, Rodrigo H. Hinojosa, Michele L. Silverstein, Enric Palle, Zachory Berta-Thompson, Ian Crossfield, Misty D. Davies, Diana Dragomir, Michael Fausnaugh, Ana Glidden, Joshua Pepper, Edward H. Morgan, Mark Rose, Joseph D. Twicken, Jesus Noel S. Villaseor, Liang Yu, Gaspar Bakos, Jacob Bean, Lars A. Buchhave, Jrgen Christensen-Dalsgaard, Jessie L. Christiansen, David R. Ciardi, Mark Clampin, Nathan De Lee, Drake Deming, John Doty, J. Garrett Jernigan, Lisa Kaltenegger, Jack J. Lissauer, P. R. McCullough, Norio Narita, Martin Paegert, Andras Pal, Stephen Rinehart, Dimitar Sasselov, Bun'Ei Sato, Alessandro Sozzetti, Keivan G. Stassun, Guillermo Torres

Research output: Contribution to journalArticlepeer-review

109 Scopus citations


Data from the newly commissioned Transiting Exoplanet Survey Satellite has revealed a "hot Earth" around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of R and orbits the star every 11 hr. Although the existence of an atmosphere around such a strongly irradiated planet is questionable, the star is bright enough (I = 11.9, K = 9.1) for this possibility to be investigated with transit and occultation spectroscopy. The star's brightness and the planet's short period will also facilitate the measurement of the planet's mass through Doppler spectroscopy.

Original languageEnglish (US)
Article numberL24
JournalAstrophysical Journal Letters
Issue number2
StatePublished - Feb 1 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • planetary systems
  • planets and satellites: detection
  • stars: individual (LHS 3844, TIC 410153553)


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