2015A&A...581L...7A

Query : 2015A&A...581L...7A

2015A&A...581L...7A - Astronomy and Astrophysics, volume 581, L7-7 (2015/9-1)

A HARPS view on K2-3.

ALMENARA J.M., ASTUDILLO-DEFRU N., BONFILS X., FORVEILLE T., SANTERNE A., ALBRECHT S., BARROS S.C.C., BOUCHY F., DELFOSSE X., DEMANGEON O., DIAZ R.F., HEBRARD G., MAYOR M., NEVES V., ROJO P., SANTOS N.C. and WUENSCHE A.

Abstract (from CDS):

K2 space observations recently found that three super-Earths transit the nearby M dwarf K2-3. The apparent brightness and the small physical radius of their host star rank these planets amongst the most favourable for follow-up characterisations. The outer planet orbits close to the inner edge of the habitable zone and might become one of the first exoplanets searched for biomarkers using transmission spectroscopy. We used the HARPS velocimeter to measure the mass of the planets. The mass of planet b is 8.4±2.1M_⊕, while our determination of those planets c and d are affected by the stellar activity. With a density of 4.32^+2.0_–0.76g/cm3, planet b is probably mostly rocky, but it could contain up to 50% water.

Abstract Copyright: ∼

Journal keyword(s): planetary systems - stars: late-type - techniques: radial velocities - techniques: photometric

Simbad objects: 5

Full paper

View the references in ADS

Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	NAME LP 424-4b	Pl	07 59 05.8395618539	+15 23 29.240025256						~	259	1
2	K2-3	PM*	11 29 20.3917077216	-01 27 17.281697868		13.52	12.17	11.88		M1V	64	0
3	Ross 905b	Pl	11 42 11.0933874353	+26 42 23.658083337						~	739	1
4	NAME G 139-21b	Pl	17 15 18.9337265994	+04 57 50.064695682						~	653	1
5	HD 209290	PM*	22 02 10.2750978279	+01 24 00.832158070	11.838	10.616	9.146	8.213	7.245	M0.5V	224	0

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