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Revisiting the Kepler field with TESS : improved ephemerides using TESS 2 min data

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Battley, Matthew, Kunimoto, Michelle, Armstrong, David J. and Pollacco, Don (2021) Revisiting the Kepler field with TESS : improved ephemerides using TESS 2 min data. Monthly Notices of the Royal Astronomical Society, 503 (3). pp. 4092-4104. doi:10.1093/mnras/stab701

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Official URL: https://doi.org/10.1093/mnras/stab701

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Abstract

Up to date planet ephemerides are becoming increasingly important as exoplanet science moves from detecting exoplanets to characterizing their architectures and atmospheres in depth. In this work, ephemerides are updated for 22 Kepler planets and 4 Kepler planet candidates, constituting all Kepler planets and candidates with sufficient signal to noise in the TESS 2 min data set. A purely photometric method is utilized here to allow ephemeris updates for planets even when they do not posses significant radial velocity data. The obtained ephemerides are of very high precision and at least seven years ‘fresher’ than archival ephemerides. In particular, significantly reduced period uncertainties for Kepler-411d, Kepler-538b, and the candidates K00075.01/K00076.01 are reported. O–C diagrams were generated for all objects, with the most interesting ones discussed here. Updated TTV fits of five known multiplanet systems with significant TTVs were also attempted (Kepler-18, Kepler-25, Kepler-51, Kepler-89, and Kepler-396), however these suffered from the comparative scarcity and dimness of these systems in TESS. Despite these difficulties, TESS has once again shown itself to be an incredibly powerful follow-up instrument as well as a planet-finder in its own right. Extension of the methods used in this paper to the 30 min-cadence TESS data and TESS extended mission has the potential to yield updated ephemerides of hundreds more systems in the future.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Planets -- Ephemerides, Extrasolar planets -- Detection
Journal or Publication Title: Monthly Notices of the Royal Astronomical Society
Publisher: Oxford University Press
ISSN: 1745-3933
Official Date: May 2021
Dates:
DateEvent
May 2021Published
10 March 2021Available
2 March 2021Accepted
Volume: 503
Number: 3
Page Range: pp. 4092-4104
DOI: 10.1093/mnras/stab701
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
NAS5-26555[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
NNX13AC07G[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
Chancellor’s International ScholarshipUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741
ST/R00384X/1[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271

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