Resolving period aliases for TESS monotransits recovered during the extended mission

Abstract

We set out to explore how best to mitigate the number of period aliases for a transiting TESS system with two identified transits separated by a large time period on the order of years. We simulate a realistic population of doubly transiting planets based on the observing strategy of the TESS primary and extended missions. We next simulate additional observations using photometry (NGTS) and spectroscopy (HARPS and CORALIE) and assess its impact on the period aliases of systems with two TESS transits. We find that TESS will detect around 400 exoplanets that exhibit one transit in each of the primary and extended missions. Based on the temporal coverage, each of these systems will have an average of 38 period aliases. We find that, assuming a combination of NGTS and CORALIE over observing campaigns spanning 50 days, we can find the true alias, and thus solve the period, for up to 207 of these systems with even more being solved if the observing campaigns are extended or we upgrade to HARPS over CORALIE.

arXiv comment11 pages, 8 figures. Accepted for publication in MNRAS

References in corpus (31)

• The Transiting Exoplanet Survey Satellite
• The K2 Mission: Characterization and Early results
• The WASP Project and the SuperWASP Cameras
• The Revised TESS Input Catalog and Candidate Target List
• The TESS Input Catalog and Candidate Target List
• Radial velocity planets de-aliased. A new, short period for Super-Earth 55 Cnc e
• A Revised Exoplanet Yield from the Transiting Exoplanet Survey Satellite (TESS)
• The Next Generation Transit Survey (NGTS)
• Occurrence Rates of Planets orbiting FGK Stars: Combining Kepler DR25, Gaia DR2 and Bayesian Inference
• TESS Discovery of a Transiting Super-Earth in the $\pi$ Mensae System
• TESS Discovery of an ultra-short-period planet around the nearby M dwarf LHS 3844
• TESS's first planet: a super-Earth transiting the naked-eye star $\pi$ Mensae
• The First Habitable Zone Earth-sized Planet from TESS. I: Validation of the TOI-700 System
• Transits and Occultations
• Determining Eccentricities of Transiting Planets: A Divide in the Mass-Period Plane
• Statistical properties of exoplanets IV. The period--eccentricity relations of exoplanets and of binary stars
• Single Transit Candidates from K2: Detection and Period Estimation
• Mass-Radius relationship for M dwarf exoplanets: Comparing nonparametric and parametric methods
• Simultaneous TESS and NGTS Transit Observations of WASP-166b
• An Estimate of the Yield of Single-Transit Planetary Events from the Transiting Exoplanet Survey Satellite
• 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
• A search for transiting planets around FGKM dwarfs and sub-giants in the TESS Full Frame Images of the Southern ecliptic hemisphere
• A Discrete Set of Possible Transit Ephemerides for Two Long Period Gas Giants Orbiting HIP 41378
• Single site observations of \textit{TESS} single transit detections
• A long period (P = 61.8-d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
• A New Yield Simulator for Transiting Planets and False Positives: Application to the Next Generation Transit Survey
• An examination of the effect of the TESS extended mission on southern hemisphere monotransits
• CHEOPS observations of TESS primary mission monotransits
• Constraining Orbital Periods from Nonconsecutive Observations: Period Estimates for Long-Period Planets in Six Systems Observed by K2 During Multiple Campaigns
• SpecPhot: A Comparison of Spectroscopic and Photometric Exoplanet Follow-Up Methods

Cited by in corpus (9)

• Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076
• The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 day Orbit with the Automated Planet Finder Telescope
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter With an Interior Earth-sized Planet Orbiting Kepler-1514
• A warm super-Neptune around the G-dwarf star TOI-1710 revealed with TESS, SOPHIE and HARPS-N
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey: III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-Transit Jupiter Orbiting TOI-2010
• Refined parameters of the HD 22946 planetary system and the true orbital period of planet d
• TESS and CHEOPS Discover Two Warm Sub-Neptunes Transiting the Bright K-dwarf HD 15906
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. VI: Confirmation of a Long-Period Giant Planet Discovered with a Single TESS Transit
• Validating the Orbital Periods of the Coolest TESS Exoplanet Candidates