2019MNRAS.490..698B

Query : 2019MNRAS.490..698B

2019MNRAS.490..698B - Mon. Not. R. Astron. Soc., 490, 698-708 (2019/November-3)

Radial velocity confirmation of K2-100b: a young, highly irradiated, and low-density transiting hot Neptune.

BARRAGAN O., AIGRAIN S., KUBYSHKINA D., GANDOLFI D., LIVINGSTON J., FRIDLUND M.C.V., FOSSATI L., KORTH J., PARVIAINEN H., MALAVOLTA L., PALLE E., DEEG H.J., NOWAK G., RAJPAUL V.M., ZICHER N., ANTONICIELLO G., NARITA N., ALBRECHT S., BEDIN L.R., CABRERA J., COCHRAN W.D., DE LEON J., EIGMULLER P., FUKUI A., GRANATA V., GRZIWA S., GUENTHER E., HATZES A.P., KUSAKABE N., LATHAM D.W., LIBRALATO M., LUQUE R., MONTANES-RODRIGUEZ P., MURGAS F., NARDIELLO D., PAGANO I., PIOTTO G., PERSSON C.M., REDFIELD S. and TAMURA M.

Abstract (from CDS):

We present a detailed analysis of HARPS-N radial velocity observations of K2-100, a young and active star in the Praesepe cluster, which hosts a transiting planet with a period of 1.7 d. We model the activity-induced radial velocity variations of the host star with a multidimensional Gaussian Process framework and detect a planetary signal of 10.6 ± 3.0 m s–1, which matches the transit ephemeris, and translates to a planet mass of 21.8 ± 6.2 M⊕. We perform a suite of validation tests to confirm that our detected signal is genuine. This is the first mass measurement for a transiting planet in a young open cluster. The relatively low density of the planet, 2.04_ - 0.61_ + 0.66 ^ g cm–3, implies that K2-100b retains a significant volatile envelope. We estimate that the planet is losing its atmosphere at a rate of 1011-1012 g s–1 due to the high level of radiation it receives from its host star.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: individual: K2-100b - techniques: photometric - techniques: radial velocities

Simbad objects: 3

goto Full paper

goto View the references in ADS

Number of rows : 3
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 K2-100 Ro* 08 38 24.3002838928 +20 06 21.828057218   11.085 10.521     G2 141 0
2 K2-100b Pl 08 38 24.3002838928 +20 06 21.828057218           ~ 83 0
3 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0

To bookmark this query, right click on this link: simbad:objects in 2019MNRAS.490..698B and select 'bookmark this link' or equivalent in the popup menu