HATS-6b: A WARM SATURN TRANSITING AN EARLY M DWARF STAR, AND A SET OF EMPIRICAL RELATIONS FOR CHARACTERIZING K AND M DWARF PLANET HOSTS

We report the discovery by the HATSouth survey of HATS-6b, an extrasolar planet transiting a V = 15.2 mag, i = 13.7 mag M1V star with a mass of 0.57 M sub([middot in circle]) and a radius of 0.57 R sub([middot in circle]). HATS-6b has a period of P = 3.3253 d, mass of M sub(p) = 0.32 M sub(J) , radi...

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Published inThe Astronomical journal Vol. 149; no. 5; pp. 1 - 20
Main Authors Hartman, J D, Bayliss, D, Brahm, R, Bakos, G A, Mancini, L, Jordan, A, Penev, K, Rabus, M, Zhou, G, Butler, R P
Format Journal Article
LanguageEnglish
Published United States 01.05.2015
Subjects
ALBEDO
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BOLOMETERS
CORRECTIONS
DENSITY
DWARF STARS
ECLIPSE
Empirical analysis
EQUILIBRIUM
Extrasolar planets
Gas giant planets
MAIN SEQUENCE STARS
MASS
Red dwarf stars
SATURN PLANET
Stars
Transits
TRANSMISSION
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Summary:We report the discovery by the HATSouth survey of HATS-6b, an extrasolar planet transiting a V = 15.2 mag, i = 13.7 mag M1V star with a mass of 0.57 M sub([middot in circle]) and a radius of 0.57 R sub([middot in circle]). HATS-6b has a period of P = 3.3253 d, mass of M sub(p) = 0.32 M sub(J) , radius of R sub(p) = 1.00 R sub(J) , and zero-albedo equilibrium temperature of T sub(eq) = 712.8 + or - 5.1 K. HATS-6 is one of the lowest mass stars known to host a close-in gas giant planet, and its transits are among the deepest of any known transiting planet system. We show that from the transit-based stellar density alone it is possible to measure the mass and radius of a ~0.6 M sub([middot in circle]) star to ~7 and ~2% precision, respectively.
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ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/149/5/166