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, François 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. Villaseñor, Lars A. Buchhave, Jørgen Christensen-Dalsgaard

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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 1.303± 0.022R⊕ 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
Article numberL24
JournalThe Astrophysical Journal
Issue number2
Number of pages9
Publication statusPublished - 2019

Bibliographical note

For full author list, see: https://doi.org/10.3847/2041-8213/aafb7a


  • Planetary systems
  • Planets and satellites: detection
  • Stars: individual (LHS 3844, TIC 410153553)


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