SIMBAD references

2022MNRAS.510.5035S - Mon. Not. R. Astron. Soc., 510, 5035-5049 (2022/March-2)

K2-99 revisited: a non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant.

SMITH A.M.S., BRETON S.N., CSIZMADIA S., DAI F., GANDOLFI D., GARCIA R.A., HOWARD A.W., ISAACSON H., KORTH J., LAM K.W.F., MATHUR S., NOWAK G., PEREZ HERNANDEZ F., PERSSON C.M., ALBRECHT S.H., BARRAGAN O., CABRERA J., COCHRAN W.D., DEEG H.J., FRIDLUND M., GEORGIEVA I.Y., GOFFO E., GUENTHER E.W., HATZES A.P., KABATH P., LIVINGSTON J.H., LUQUE R., PALLE E., REDFIELD S., RODLER F., SERRANO L.M. and VAN EYLEN V.

Abstract (from CDS):

We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2's Campaign 17 allows us to refine the stellar properties. We find K2-99 to be significantly smaller than previously thought, with R_* = 2.55 ± 0.02 R_☉. The new light curve also contains four transits of K2-99 b, which we use to improve our knowledge of the planetary properties. We find the planet to be a non-inflated warm Jupiter, with R_b = 1.06 ± 0.01 R_Jup. 60 new radial velocity measurements from HARPS, HARPS-N, and HIRES enable the determination of the orbital parameters of K2-99 c, which were previously poorly constrained. We find that this outer planet has a minimum mass M_csin i_c = 8.4 ± 0.2 M_Jup, and an eccentric orbit (e_c = 0.210 ± 0.009) with a period of 522.2 ± 1.4 d. Upcoming TESS observations in 2022 have a good chance of detecting the transit of this planet, if the mutual inclination between the two planetary orbits is small.

Journal keyword(s): planetary systems - planets and satellites: detection - planets and satellites: individual: K2-99 b - planets and satellites: individual: K2-99 c

Simbad objects: 9

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