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

Vanderspek, Roland and Christiansen, Jessie L. and Ciardi, David R. (2019) TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844. Astrophysical Journal Letters, 871 (2). Art. No. L24. ISSN 2041-8213. doi:10.3847/2041-8213/aafb7a.

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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 ± 0.022 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Christiansen, Jessie L.0000-0002-8035-4778
Ciardi, David R.0000-0002-5741-3047
Additional Information:© 2019 The American Astronomical Society. Received 2018 September 17; revised 2018 December 17; accepted 2018 December 20; published 2019 January 25. We acknowledge the use of TESS Alert data, which is currently in a beta test phase, from the TESS Science Office. Funding for the TESS mission is provided by NASA's Science Mission directorate. This research has made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This work makes use of observations from the LCOGT network. Work by J.N.W. was partially supported by the Heising-Simons Foundation. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular, the institutions participating in the Gaia Multilateral Agreement. The MEarth team acknowledges funding from the David and Lucile Packard Fellowship for Science and Engineering (awarded to D.C.). This material is based on work supported by the National Science Foundation under grants AST-0807690, AST-1109468, AST-1004488 (Alan T. Waterman Award), and AST-1616624. Acquisition of the CHIRON data was made possible through the support of a grant from the John Templeton Foundation. The opinions expressed in this publication are those of the authors and do not necessarily reflect the views of the John Templeton Foundation. J.A.D. acknowledges support by the Heising-Simons Foundation as a 51 Pegasi b postdoctoral fellow. E.R.N. is supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1602597. We thank the Geneva University and the Swiss National Science Foundation for their continuous support for the Euler telescope. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. C.X.H. acknowledges support from MIT's Kavli Institute as a Torres postdoctoral fellow. A.V.'s work was performed under contract with the California Institute of Technology/Jet Propulsion Laboratory funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. Funding for the Stellar Astrophysics Centre is provided by The Danish National Research Foundation (Grant DNRF106). This work is partly supported by JSPS KAKENHI grant No. JP18H01265 and JST PRESTO grant No. JPMJPR1775. D.D. acknowledges support provided by NASA through Hubble Fellowship grant HST-HF2-51372.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Facilities: TESS - , CTIO:1.5m (CHIRON) - , Euler1.2m (CORALIE) - , LCO:0.4m (SBIG) - , LCO:1.0m (Sinistro). -
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Heising-Simons FoundationUNSPECIFIED
Gaia Multilateral AgreementUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
John Templeton FoundationUNSPECIFIED
NSF Astronomy and Astrophysics FellowshipAST-1602597
Geneva UniversityUNSPECIFIED
Swiss National Science Foundation (SNSF)UNSPECIFIED
Massachusetts Institute of Technology (MIT)UNSPECIFIED
Danish National Research FoundationDNRF106
Japan Society for the Promotion of Science (JSPS)JP18H01265
Japan Science and Technology Agency (JST)JPMJPR1775
NASA Hubble FellowshipHST-HF2-51372.001-A
Subject Keywords:planetary systems – planets and satellites: detection – stars: individual (LHS 3844, TIC 410153553)
Issue or Number:2
Record Number:CaltechAUTHORS:20190125-131430518
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Official Citation:Roland Vanderspek et al 2019 ApJL 871 L24
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92478
Deposited By: Tony Diaz
Deposited On:29 Jan 2019 19:34
Last Modified:16 Nov 2021 03:50

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