Single site observations of \textit{TESS} single transit detections

Abstract

Context: TESS has been successfully launched and has begin data acquisition. To expedite the science that may be performed with the resulting data it is necessary to gain a good understanding of planetary yields. Given the observing strategy employed by TESS the probability of detecting single transits in long period systems is increased. These systems require careful consideration. Aims: To simulate the number of TESS transit detections during its 2 year mission with a particular emphasis on single transits. Additionally, to determine the feasibility of ground-based follow-up observations from a single site. Methods: A distribution of planets is simulated around the $\sim$ 4 million stars in the TESS Candidate Target List. These planets are tested for detectable transits and characterised. Based on simulated parameters the single transit detections are further analysed to determine which are amenable to ground-based follow-up. Results: TESS will discover an approximate lower bound of 4700 planets with around 460 being single transits. A large fraction of these will be observable from a single ground-based site. This paper finds that, in a single year, approximately 1000 transit events of around 320 unique TESS single transit detections are theoretically observable. Conclusions: As we consider longer period exoplanets the need for exploring single transit detections increases. For periods $\gtrsim 45$ days the number of single transit detections outnumber multitransits by a factor of 3 (82$\pm$18 and 25$\pm$7 respectively) a factor which only grows as longer period detections are considered. Therefore, it is worth expending the extra effort required to follow-up these more challenging, but potentially very rewarding, discoveries. Additionally, we conclude that a large fraction of these targets can be theoretically observed from just a single ground-based site.

arXiv comment12 pages, 19 figures. To be published in Astronomy and Astrophysics

References in corpus (26)

• The Transiting Exoplanet Survey Satellite
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• The James Webb Space Telescope
• The K2 Mission: Characterization and Early results
• The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
• The WASP Project and the SuperWASP Cameras
• The false positive rate of Kepler and the occurrence of planets
• The NASA Exoplanet Archive: Data and Tools for Exoplanet Research
• Kepler planets: a tale of evaporation
• The evaporation valley in the Kepler planets
• The TESS Input Catalog and Candidate Target List
• A Framework for Prioritizing the TESS Planetary Candidates Most Amenable to Atmospheric Characterization
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
• An asteroseismic view of the radius valley: stripped cores, not born rocky
• The Role of Core Mass in Controlling Evaporation: the Kepler Radius Distribution and the Kepler-36 Density Dichotomy
• PandExo: A Community Tool for Transiting Exoplanet Science with JWST & HST
• Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities
• KELT-1b: A Strongly Irradiated, Highly Inflated, Short Period, 27 Jupiter-mass Companion Transiting a mid-F Star
• A Revised Exoplanet Yield from the Transiting Exoplanet Survey Satellite (TESS)
• The Next Generation Transit Survey (NGTS)
• Hot super-Earths stripped by their host stars
• Simulated JWST/NIRISS Transit Spectroscopy of Anticipated TESS Planets Compared to Select Discoveries from Space-Based and Ground-Based Surveys
• Single Transit Candidates from K2: Detection and Period Estimation
• Characterizing Long-Period Transiting Planets Observed by Kepler
• Quantifying the Observational Effort Required for the Radial Velocity Characterization of TESS Planets

Cited by in corpus (24)

• The TESS Objects of Interest Catalog from the TESS Prime Mission
• SOAR TESS Survey. II: The impact of stellar companions on planetary populations
• TOI-222: a single-transit TESS candidate revealed to be a 34-day eclipsing binary with CORALIE, EulerCam and NGTS
• NGTS-11 b / TOI-1847 b: A transiting warm Saturn recovered from a TESS single-transit event
• Predicting the Exoplanet Yield of the TESS Prime and Extended Missions Through Years 1-7
• The TESS-Keck Survey I: A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras
• Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b
• Shallow transit follow-up from NGTS: simultaneous observations of HD106315 with 11 identical telescopes
• A long period (P = 61.8-d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter With an Interior Earth-sized Planet Orbiting Kepler-1514
• Identify Light-Curve Signals with Deep Learning Based Object Detection Algorithm. I. Transit Detection
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Year, Highly Eccentric Orbit
• Resolving period aliases for TESS monotransits recovered during the extended mission
• An examination of the effect of the TESS extended mission on southern hemisphere monotransits
• Precovery of TESS Single Transits with KELT
• The independent discovery of planet candidates around low mass stars and astrophysical false positives from the first two TESS sectors
• CHEOPS observations of TESS primary mission monotransits
• On the follow-up efforts of long-period transiting planet candidates detected with Gaia astrometry
• Contemporaneous Observations of $H\alpha$ Luminosities and Photometric Amplitudes for M Dwarfs
• Following up TESS Single Transits With Archival Photometry and Radial Velocities
• SpecPhot: A Comparison of Spectroscopic and Photometric Exoplanet Follow-Up Methods
• Empirical Predictions for the Period Distribution of Planets to be Discovered by the Transiting Exoplanet Survey Satellite
• Transit-period search from single-event space-based data: the role of wide-field surveys
• The Visual Survey Group: A Decade of Hunting Exoplanets and Unusual Stellar Events with Space-Based Telescopes