SIMBAD references

2020MNRAS.497.4423N - Mon. Not. R. Astron. Soc., 497, 4423-4435 (2020/October-1)

K2-280 b - a low density warm sub-Saturn around a mildly evolved star.

NOWAK G., PALLE E., GANDOLFI D., DEEG H.J., HIRANO T., BARRAGAN O., KUZUHARA M., DAI F., LUQUE R., PERSSON C.M., FRIDLUND M., JOHNSON M.C., KORTH J., LIVINGSTON J.H., GRZIWA S., MATHUR S., HATZES A.P., PRIETO-ARRANZ J., NESPRAL D., HIDALGO D., HJORTH M., ALBRECHT S., VAN EYLEN V., LAM K.W.F., COCHRAN W.D., ESPOSITO M., CSIZMADIA S., GUENTHER E.W., KABATH P., BLAY P., BRAHM R., JORDAN A., ESPINOZA N., ROJAS F., CASASAYAS BARRIS N., RODLER F., SOBRINO R.A., CABRERA J., CARLEO I., CHAUSHEV A., DE LEON J., EIGMULLER P., ENDL M., ERIKSON A., FUKUI A., GEORGIEVA I., GONZALEZ-CUESTA L., KNUDSTRUP E., LUND M.N., MONTANES RODRIGUEZ P., MURGAS F., NARITA N., NIRAULA P., PATZOLD M., RAUER H., REDFIELD S., RIBAS I., SKARKA M., SMITH A.M.S. and SUBJAK J.

Abstract (from CDS):

We present an independent discovery and detailed characterization of K2-280 b, a transiting low density warm sub-Saturn in a 19.9-d moderately eccentric orbit (e = 0.35–0.04+0.05 ) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280 b has a radius of Rb = 7.50 ± 0.44 R⊕ and a mass of Mb = 37.1 ± 5.6 M⊕, yielding a mean density of ρb = 0.48_ - 0.10_ + 0.13 ^ g cm–3. The host star is a mildly evolved G7 star with an effective temperature of Teff = 5500 ± 100 K, a surface gravity of logg* = 4.21 ± 0.05 (cgs), and an iron abundance of [Fe/H] = 0.33 ±0.08 dex, and with an inferred mass of M* = 1.03 ± 0.03 M☉ and a radius of R* = 1.28 ± 0.07 R☉. We discuss the importance of K2-280 b for testing formation scenarios of sub-Saturn planets and the current sample of this intriguing group of planets that are absent in the Solar system.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - techniques: spectroscopic - planets and satellites: detection - stars: individual: ((EPIC 216494238, K2-280))

Simbad objects: 12

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