HD 219134 Revisited: Planet d Transit Upper Limit and Planet f Transit Nondetection with ASTERIA and TESS
Name
Seager_2021_AJ_161_117.pdf
Description
Published version
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2.28 MB
Format
Unknown
Checksum (MD5)
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Author(s)
Seager, Sara
Knapp, Mary E.
Krishnamurthy, Akshata
Huang, Chelsea X.
Badenas, Mariona
Shporer, Abraham-Avi
Ricker, George R
Vanderspek, Roland K
Fausnaugh, Michael
Glidden, Ana
Date Issued
2021
Journal
Astronomical Journal
Publisher
American Astronomical Society
Version
Final published version
Abstract
HD 219134 is a K3V dwarf star with six reported radial-velocity discovered planets. The two innermost planets b and c show transits, raising the possibility of this system to be the nearest (6.53 pc), brightest (V = 5.57) example of a star with a compact multiple transiting planet system. Ground-based searches for transits of planets beyond b and c are not feasible because of the infrequent transits, long transit duration (~5 hr), shallow transit depths (<1%), and large transit time uncertainty (~half a day). We use the space-based telescopes the Arcsecond Space Telescope Enabling Research in Astrophysics (ASTERIA) and the Transiting Exoplanet Survey Satellite (TESS) to search for transits of planets f (P = 22.717 days and M sin i = 7.3 ± 0.04M ) and d (P?=?46.859 days and M sin i = 16.7 ± 0.64MÅ). ASTERIA was a technology demonstration CubeSat with an opportunity for science in an extended program. ASTERIA observations of HD 219134 were designed to cover the 3s transit windows for planets f and d via repeated visits over many months. While TESS has much higher sensitivity and more continuous time coverage than ASTERIA, only the HD 219134 f transit window fell within the TESS survey's observations. Our TESS photometric results definitively rule out planetary transits for HD 219134 f. We do not detect the Neptune-mass HD 219134 d transits and our ASTERIA data are sensitive to planets as small as 3.6 R . We provide TESS updated transit times and periods for HD 219134 b and c, which are designated TOI 1469.01 and 1469.02 respectively. ⊙ ⊙
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Haystack Observatory
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DOI of Published Version
https://doi.org/10.3847/1538-3881/ABCD3D
