2019AJ....157..100J

Query : 2019AJ....157..100J

2019AJ....157..100J - Astron. J., 157, 100-100 (2019/March-0)

K2-287 b: an eccentric warm Saturn transiting a G-dwarf.

JORDAN A., BRAHM R., ESPINOZA N., CORTES C., DIAZ M., DRASS H., HENNING T., JENKINS J.S., JONES M.I., RABUS M., ROJAS F., SARKIS P., VUCKOVIC M., ZAPATA A., SOTO M.G., BAKOS G.A., BAYLISS D., BHATTI W., CSUBRY Z., LACHAUME R., MORAGA V., PANTOJA B., OSIP D., SHPORER A., SUC V. and VASQUEZ S.

Abstract (from CDS):

We report the discovery of K2-287b, a Saturn mass planet orbiting a G-dwarf with a period of P ≃ 15 days. First uncovered as a candidate using K2 campaign 15 data, follow-up photometry and spectroscopy were used to determine a mass MP=0.317±0.026MJ, radius RP=0.833±0.013RJ, period P=14.893291±0.000025 days, and eccentricity e=0.476±0.026. The host star is a metal-rich V = 11.410 ± 0.129 mag G-dwarf for which we estimate a mass M*=1.056–0.021+0.022M☉, radius R*=1.070±0.010R☉, metallicity [Fe/H] = 0.20 ±0.05, and Teff=5673±75 K. This warm eccentric planet with a time-averaged equilibrium temperature of Teq~800 K adds to the small sample of giant planets orbiting nearby stars whose structure is not expected to be affected by stellar irradiation. Follow-up studies on the K2-287 system could help constrain theories of planet migration in close-in orbits.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: gaseous planets - stars: individual: K2-287

VizieR on-line data: <Available at CDS (J/AJ/157/100): table1.dat>

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HAT-P-38b Pl 02 21 31.9803537360 +32 14 46.093339140           ~ 45 2
2 HATS-20b Pl 13 12 31.9019216712 -45 35 26.039190660           ~ 8 0
3 K2-287 * 15 32 17.8469564328 -22 21 29.764289520   12.01 11.308 11.04 10.309 ~ 28 0
4 K2-287b Pl 15 32 17.8469564328 -22 21 29.764289520           ~ 23 0

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