2018A&A...620A..77L

Query : 2018A&A...620A..77L

2018A&A...620A..77L - Astronomy and Astrophysics, volume 620A, 77-77 (2018/12-1)

K2-265 b: a transiting rocky super-Earth.

LAM K.W.F., SANTERNE A., SOUSA S.G., VIGAN A., ARMSTRONG D.J., BARROS S.C.C., BRUGGER B., ADIBEKYAN V., ALMENARA J.-M., DELGADO MENA E., DUMUSQUE X., BARRADO D., BAYLISS D., BONOMO A.S., BOUCHY F., BROWN D.J.A., CIARDI D., DELEUIL M., DEMANGEON O., FAEDI F., FOXELL E., JACKMAN J.A.G., KING G.W., KIRK J., LIGI R., LILLO-BOX J., LOPEZ T., LOVIS C., LOUDEN T., NIELSEN L.D., McCORMAC J., MOUSIS O., OSBORN H.P., POLLACCO D., SANTOS N.C., UDRY S. and WHEATLEY P.J.

Abstract (from CDS):

We report the discovery of the super-Earth K2-265 b detected with K2 photometry. The planet orbits a bright (Vmag=11.1) star of spectral type G8V with a period of 2.37-days. We obtained high-precision follow-up radial velocity measurements from HARPS, and the joint Bayesian analysis showed that K2-265 b has a radius of 1.71±0.11R⊕ and a mass of 6.54±0.84M⊕, corresponding to a bulk density of 7.1±1.8g/cm3. Composition analysis of the planet reveals an Earth-like, rocky interior; this object has a rock mass fraction of ∼80%. The short orbital period and small radius of the planet puts it below the lower limit of the photoevaporation gap, where the envelope of the planet could have eroded owing to strong stellar irradiation, leaving behind an exposed core. Knowledge of the planet core composition allows us to infer the possible formation and evolution mechanism responsible for its current physical parameters.

Abstract Copyright: © ESO 2018

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: detection - stars: individual: K2-265 - planets and satellites: composition

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME G 268-38b Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 180 0
2 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 810 1
3 K2-38c Pl 16 00 08.0580517944 -23 11 21.329133720           ~ 23 0
4 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 720 1
5 Kepler-20b Pl 19 10 47.5233433920 +42 20 19.301370684           ~ 109 1
6 Kepler-11 Er* 19 48 27.6226218768 +41 54 32.903163504   14.635 13.838 13.742   G2V 351 1
7 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 1859 1
8 BD-15 6276 * 22 48 07.5636746640 -14 29 40.842154644   11.97 11.19     ?+M4-7 22 0
9 BD-15 6276b Pl 22 48 07.5636746640 -14 29 40.842154644           ~ 20 0
10 BD-00 4534b Pl 23 35 49.2850684896 +00 26 43.844566272           ~ 37 0

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