Following up TESS Single Transits with Archival Photometry and Radial Velocities

Yao, Xinyu and Pepper, Joshua and Gaudi, B. Scott and Dalba, Paul A. and Burt, Jennifer A. and Wittenmyer, Robert A. and Dragomir, Diana and Rodriguez, Joseph E. and Villanueva, Steven, Jr. and Stevens, Daniel J. and Stassun, Keivan G. and James, David J. (2021) Following up TESS Single Transits with Archival Photometry and Radial Velocities. The Astronomical Journal, 161 (3):124. pp. 1-14. ISSN 0004-6256

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Abstract

NASA's Transiting Exoplanet Survey Satellite (TESS) mission is expected to discover hundreds of planets via single transits first identified in their light curves. Determining the orbital period of these single-transit candidates typically requires a significant amount of follow-up work to observe a second transit or measure a radial velocity (RV) orbit. In Yao et al., we developed simulations that demonstrated the ability to use archival photometric data in combination with TESS to 'precover' the orbital period for these candidates with a precision of several minutes, assuming circular orbits. In this work, we incorporate updated models for TESS single transits, allowing for eccentric orbits, along with an updated methodology to improve the reliability of the results. Additionally, we explore how RV observations can be used to follow up single-transit events, using strategies distinct from those employed when the orbital period is known. We find that the use of an estimated period based on a circular orbit to schedule reconnaissance RV observations can efficiently distinguish eclipsing binaries from planets. For candidates that pass reconnaissance RV observations, we simulate RV monitoring campaigns that enable one to obtain an approximate orbital solution. We find that this method can regularly determine the orbital periods for planets more massive than 0.5 M<SUB>J</SUB> with orbital periods as long as 100 days.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 10 Jan 2022 02:53
Last Modified: 10 Jan 2022 03:35
Uncontrolled Keywords: Transit photometry; Radial velocity; Ground-based astronomy; Exoplanet detection methods; Astronomy data analysis; 1709; 1332; 686; 489; 1858; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/abdb30
URI: http://eprints.usq.edu.au/id/eprint/45065

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