2018A&A...612A..95B

Query : 2018A&A...612A..95B

2018A&A...612A..95B - Astronomy and Astrophysics, volume 612A, 95-95 (2018/4-1)

K2-141 b. A 5-M⊕ super-Earth transiting a K7 V star every 6.7 h.

BARRAGAN O., GANDOLFI D., DAI F., LIVINGSTON J., PERSSON C.M., HIRANO T., NARITA N., CSIZMADIA S., WINN J.N., NESPRAL D., PRIETO-ARRANZ J., SMITH A.M.S., NOWAK G., ALBRECHT S., ANTONICIELLO G., BO JUSTESEN A., CABRERA J., COCHRAN W.D., DEEG H., EIGMULLER P., ENDL M., ERIKSON A., FRIDLUND M., FUKUI A., GRZIWA S., GUENTHER E., HATZES A.P., HIDALGO D., JOHNSON M.C., KORTH J., PALLE E., PATZOLD M., RAUER H., TANAKA Y. and VAN EYLEN V.

Abstract (from CDS):

We report on the discovery of K2-141 b (EPIC 246393474 b), an ultra-short-period super-Earth on a 6.7h orbit transiting an active K7 V star based on data from K2 campaign 12. We confirmed the planet's existence and measured its mass with a series of follow-up observations: seeing-limited MuSCAT imaging, NESSI high-resolution speckle observations, and FIES and HARPS high-precision radial-velocity monitoring. K2-141 b has a mass of 5.31±0.46M⊕ and radius of 1.54–0.09+0.10R⊕, yielding a mean density of 8.00–1.45+1.83g/cm3 and suggesting a rocky-iron composition. Models indicate that iron cannot exceed ∼70% of the total mass. With an orbital period of only 6.7h, K2-141 b is the shortest-period planet known to date with a precisely determined mass.

Abstract Copyright: © ESO 2018

Journal keyword(s): planetary systems - planets and satellites: individual: EPIC 246393474 b - stars: fundamental parameters - stars: individual: EPIC 246393474 - techniques: photometric - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/612/A95): rvharps.dat rvfies.dat lck2.dat>

Simbad objects: 12

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Number of rows : 12
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 HD 3167b Pl 00 34 57.5242131960 +04 22 53.284093032           ~ 65 0
2 K2-106b Pl 00 52 19.1415736296 +10 47 40.906374828           ~ 52 0
3 CoRoT-7b Pl 06 43 49.4690164104 -01 03 46.826642700           ~ 402 1
4 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 576 1
5 K2-131 * 12 11 00.3783875832 -09 45 54.781040484   13.054 12.115     ~ 19 0
6 K2-137 PM* 12 27 28.9846732536 -06 11 42.831206628   17.007 15.498     M3V 6 0
7 Kepler-974b Pl 19 00 03.1451105376 +40 13 14.798618364           ~ 23 0
8 Kepler-10b Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 297 1
9 Kepler-78b Pl 19 34 58.0137407208 +44 26 53.960186940           ~ 140 1
10 Kepler-70b Pl 19 45 25.4745687168 +41 05 33.882248544           ~ 16 1
11 K2-141b Pl 23 23 39.9709098120 -01 11 21.448681332           ~ 68 0
12 StKM 1-2122 PM* 23 23 39.9709098120 -01 11 21.448681332   12.14 11.45     K7V 35 0

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