Program: GS-2020A-Q-125
Title: | Validation and Characterization of TESS Exoplanets (South) |
PI: | Steve Howell |
Co-I(s): | Nic Scott, Rachel Matson |
Abstract
The NASA TESS mission, building on the success of Kepler and K2, promises to once again change our view of exoplanets. TESS will observe the entire sky, finding candidate exoplanets orbiting bright and nearby stars. Validation and characterization of these exoplanets by high-resolution imaging has been shown to be absolutely necessary in order to not only prove the planets existence but to allow assignment of a correct radius and density to each exoplanet. The true nature of exoplanet host star binarity, in terms of their orbital period distribution, mass ratio, binary orbit, and even which star the postulated planet orbits are not known a priori but our imaging solves these dilemmas. We propose to continue our community-based speckle imaging program at Gemini and observe TESS exoplanet host stars as well as a few remaining high-value K2 candidates. Given that ~50% of exoplanet host stars are binaries, without high resolution images of the host star a) small planets, especially those in habitable zone orbits, can not be validated and properly characterized and b) any true exoplanet will have, on average, an incorrect radius by a factor of 1.5, that is, the planet will be larger than assumed. We will continue to make all of our reduced data immediately public at the Gemini and NASA Exoplanet Archive.
Publications using this program's data
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[ADS] TESS Discovery of a Super-Earth and Three Sub-Neptunes Hosted by the Bright, Sun-like Star HD 108236
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[ADS] A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
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[ADS] Planet Hunters TESS II: findings from the first two years of TESS
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[ADS] Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1-1000 au and Implications for Small Planet Detection
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[data]
[ADS] TOI-1231 b: A Temperate, Neptune-sized Planet Transiting the Nearby M3 Dwarf NLTT 24399
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[ADS] Twin High-resolution, High-speed Imagers for the Gemini Telescopes: Instrument description and science verification results
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[ADS] TESS Giants Transiting Giants. I.: A Noninflated Hot Jupiter Orbiting a Massive Subgiant
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[ADS] Validation of 13 Hot and Potentially Terrestrial TESS Planets
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[ADS] HATS-74Ab, HATS-75b, HATS-76b, and HATS-77b: Four Transiting Giant Planets Around K and M Dwarfs
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[ADS] TESS Hunt for Young and Maturing Exoplanets (THYME). VI. An 11 Myr Giant Planet Transiting a Very-low-mass Star in Lower Centaurus Crux
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[ADS] A Dearth of Close-in Stellar Companions to M-dwarf TESS Objects of Interest
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[ADS] Speckle Interferometric Observations With the Gemini 8-m Telescopes: Signal-to-Noise Calculations and Observational Results
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[ADS] Determining Which Binary Component Hosts the TESS Transiting Planet
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[ADS] A Close-in Puffy Neptune with Hidden Friends: The Enigma of TOI 620
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[ADS] A low-eccentricity migration pathway for a 13-h-period Earth analogue in a four-planet system
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[ADS] TESS Hunt for Young and Maturing Exoplanets (THYME). IX. A 27 Myr Extended Population of Lower Centaurus Crux with a Transiting Two-planet System
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[ADS] TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
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[ADS] Spinning up a Daze: TESS Uncovers a Hot Jupiter Orbiting the Rapid Rotator TOI-778
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[ADS] VaTEST. II. Statistical Validation of 11 TESS-detected Exoplanets Orbiting K-type Stars
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[ADS] A Transiting Super-Earth in the Radius Valley and an Outer Planet Candidate Around HD 307842
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star
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[data]
[ADS] TOI-733 b: A planet in the small-planet radius valley orbiting a Sun-like star