TESS delivers its first Earth-sized planet and a warm sub-Neptune
Name
Dragomir_2019_ApJL_875_L7.pdf
Description
Published version
Size
2.63 MB
Format
Adobe PDF
Checksum (MD5)
57c4db8a26f0fe228b6e71010573bf9a
Author(s)
Dragomir, Diana
Günther, Maximilian N.
Burt, Jennifer A.
Huang, Chelsea
Matthews, Elisabeth
Ricker, George R.
Vanderspek, Roland K.
Seager, Sara
Francis, James
Goeke, Robert F.
Date Issued
April 2019
Journal
Astrophysical journal. Letters
Publisher
American Astronomical Society
Citation
Dragomir, Diana, et al., "TESS delivers its first Earth-sized planet and a warm sub-Neptune." Astrophysical journal. Letters 875, 2 (April 2019): letter 7 doi 10.3847/2041-8213/AB12ED ©2019 Author(s)
Version
Final published version
Abstract
© 2019. The American Astronomical Society. All rights reserved.. The future of exoplanet science is bright, as Transiting Exoplanet Survey Satellite (TESS) once again demonstrates with the discovery of its longest-period confirmed planet to date. We hereby present HD 21749b (TOI 186.01), a sub-Neptune in a 36 day orbit around a bright (V = 8.1) nearby (16 pc) K4.5 dwarf. TESS measures HD 21749b to be R ⊕, and combined archival and follow-up precision radial velocity data put the mass of the planet at M ⊕. HD 21749b contributes to the TESS Level 1 Science Requirement of providing 50 transiting planets smaller than 4 R ⊕ with measured masses. Furthermore, we report the discovery of HD 21749c (TOI 186.02), the first Earth-sized () planet from TESS. The HD 21749 system is a prime target for comparative studies of planetary composition and architecture in multi-planet systems.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.3847/2041-8213/AB12ED
