Multiple Transits during a Single Conjunction: Identifying Transiting Circumbinary Planetary Candidates from TESS
arXiv:2008.02756 · doi:10.3847/1538-3881/abad40
Abstract
We present results of a study on identifying circumbinary planet candidates that produce multiple transits during one conjunction with eclipsing binary systems. The occurrence of these transits enables us to estimate the candidates' orbital periods, which is crucial as the periods of the currently known transiting circumbinary planets are significantly longer than the typical observational baseline of TESS. Combined with the derived radii, it also provides valuable information needed for follow-up observations and subsequent confirmation of a large number of circumbinary planet candidates from TESS. Motivated by the discovery of the 1108-day circumbinary planet Kepler-1647, we show the application of this technique to four of Kepler's circumbinary planets that produce such transits. Our results indicate that in systems where the circumbinary planet is on a low-eccentricity orbit, the estimated planetary orbital period is within <10-20% of the true value. This estimate is derived from photometric observations spanning less than 5% of the planet's period, demonstrating the strong capability of the technique. Capitalizing on the current and future eclipsing binaries monitored by NASA's TESS mission, we estimate that hundreds of circumbinary planets candidates producing multiple transits during one conjunction will be detected in the TESS data. Such a large sample will enable statistical understanding of the population of planets orbiting binary stars and shed new light on their formation and evolution.
16 pages, 6 figures, 2 tables, AJ accepted
References in corpus (26)
- The Transiting Exoplanet Survey Satellite
- The PLATO 2.0 Mission
- The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
- The Transiting Circumbinary Planets Kepler-34 and Kepler-35
- KOI-126: A Triply-Eclipsing Hierarchical Triple with Two Low-Mass Stars
- Kepler-413b: a slightly misaligned, Neptune-size transiting circumbinary planet
- KIC 9632895 - The 10th Kepler Transiting Circumbinary Planet
- On the Abundance of Circumbinary Planets
- Kepler-1647b: the largest and longest-period Kepler transiting circumbinary planet
- Planets Transiting Non-Eclipsing Binaries
- A Gas Giant Circumbinary Planet Transiting the F Star Primary of the Eclipsing Binary Star KIC 4862625 and the Independent Discovery and Characterization of the two transiting planets in the Kepler-47 System
- TOI-1338: TESS' First Transiting Circumbinary Planet
- Calculating the Habitable Zone of Binary Star Systems II: P-Type Binaries
- Migration and gas accretion scenarios for the Kepler 16, 34 and 35 circumbinary planets
- Modelling Circumbinary Planets: The case of Kepler-38
- Stability Limits of Circumbinary Planets: Is There a Pile-up in the Kepler CBPs?
- Uncovering Circumbinary Planetary Architectural Properties from Selection Biases
- The BEBOP radial-velocity survey for circumbinary planets I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets
- An Analytic Theory for the Orbits of Circumbinary Planets
- On the Fate of Unstable Circumbinary Planets: Tatooine's Close Encounters with a Death Star
- An Estimate of the Yield of Single-Transit Planetary Events from the Transiting Exoplanet Survey Satellite
- Evolution of circumbinary planets around eccentric binaries: The case of Kepler-34
- Kepler-1661 b: A Neptune-sized Kepler Transiting Circumbinary Planet around a Grazing Eclipsing Binary
- Circumbinary planets II - when transits come and go
- The binary mass ratios of circumbinary planet hosts
- An Automated Method to Detect Transiting Circumbinary Planets