Program: GS-2019B-Q-111
Title: | K2 and TESS Exoplanet Validation and Characterization: Small, Rocky Planets, Host Star Systems (South) |
PI: | Steve Howell |
Co-I(s): | Elliott P. Horch, Mark Everett, Rachel Matson, David Ciardi, Nic Scott |
Abstract
The NASA K2 mission has recently ended after four years of operation. K2 observed more stars than the original Kepler mission and to date there are currently over 250 validated K2 exoplanets and more than 500 additional candidates (as of Jan 2019), up through Campaign 18. TESS started science operations in 2018 with >100 "alerts" (bright, high likelihood exoplanet transit host stars) and full candidate lists of targets in semester 2019B. Many of the K2 & TESS candidates are small (rocky) exoplanets, they orbit bright stars, and are amenable to RV mass determination. Our team has shown, and it is now well accepted, that about one half of all exoplanet host stars are binary or multiple systems. Without high resolution images of the host star a) small planets, especially those in habitable zone orbits, can not be validated, 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. This proposal will obtain high resolution imaging for K2 and TESS exoplanet candidate host stars, including those thought to harbor small, habitable zone planets to provide validation, characterization, and assess binarity. We will continue to make all of our reduced data immediately public at the NASA Exoplanet Archive.
Publications using this program's data
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[data]
[ADS] TOI-220 b: a warm sub-Neptune discovered by TESS
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[data]
[ADS] WASP-4 Is Accelerating toward the Earth
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[data]
[ADS] LHS 1815b: The First Thick-disk Planet Detected by TESS
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[ADS] The First Habitable-zone Earth-sized Planet from TESS. I. Validation of the TOI-700 System
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[ADS] A remnant planetary core in the hot-Neptune desert
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[data]
[ADS] TOI-257b (HD 19916b): a warm sub-saturn orbiting an evolved F-type star
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[ADS] TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images
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[ADS] A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113
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[ADS] TESS Hunt for Young and Maturing Exoplanets (THYME). V. A Sub-Neptune Transiting a Young Star in a Newly Discovered 250 Myr Association
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[data]
[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] TESS and HARPS reveal two sub-Neptunes around TOI 1062
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[data]
[ADS] TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf
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[data]
[ADS] TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion
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[ADS] A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS
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[ADS] Validation of 13 Hot and Potentially Terrestrial TESS Planets
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[ADS] A Dearth of Close-in Stellar Companions to M-dwarf TESS Objects of Interest
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[ADS] Determining Which Binary Component Hosts the TESS Transiting Planet
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[ADS] TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone
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[ADS] ESPRESSO observations of HE 0107−5240 and other CEMP-no stars with [Fe/H] ≤ -4.5
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[data]
[ADS] TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter
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[ADS] Characterization of a Set of Small Planets with TESS and CHEOPS and an Analysis of Photometric Performance
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[ADS] The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one