2017AJ....154..226D

Query : 2017AJ....154..226D

2017AJ....154..226D - Astron. J., 154, 226-226 (2017/December-4)

The discovery and mass measurement of a new ultra-short-period planet: K2-131b.

DAI F., WINN J.N., GANDOLFI D., WANG S.X., TESKE J.K., BURT J., ALBRECHT S., BARRAGAN O., COCHRAN W.D., ENDL M., FRIDLUND M., HATZES A.P., HIRANO T., HIRSCH L.A., JOHNSON M.C., JUSTESEN A.B., LIVINGSTON J., PERSSON C.M., PRIETO-ARRANZ J., VANDERBURG A., ALONSO R., ANTONICIELLO G., ARRIAGADA P., BUTLER R.P., CABRERA J., CRANE J.D., CUSANO F., CSIZMADIA S., DEEG H., DIETERICH S.B., EIGMULLER P., ERIKSON A., EVERETT M.E., FUKUI A., GRZIWA S., GUENTHER E.W., HENRY G.W., HOWELL S.B., JOHNSON J.A., KORTH J., KUZUHARA M., NARITA N., NESPRAL D., NOWAK G., PALLE E., PATZOLD M., RAUER H., MONTANES RODRIGUEZ P., SHECTMAN S.A., SMITH A.M.S., THOMPSON I.B., VAN EYLEN V., WILLIAMSON M.W. and WITTENMYER R.A.

Abstract (from CDS):

We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of 1.81–0.12+0.16 R⊕ and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian process regression based on both the radial velocity and photometric time series. The results are consistent and lead to a mass measurement of 6.5±1.6 M⊕ and a mean density of 6.0–2.7+3.0 g cm–3.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - stars: individual: EPIC 228732031 - stars: individual: EPIC 228732031

VizieR on-line data: <Available at CDS (J/AJ/154/226): table1.dat table2.dat table3.dat table4.dat>

Simbad objects: 16

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Number of rows : 16
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 * rho01 Cnc EB* 08 52 35.8111044043 +28 19 50.954994470 7.45 6.82   5.4   K0IV-V 1121 1
6 K2-131 * 12 11 00.3783875832 -09 45 54.781040484   13.054 12.115     ~ 19 0
7 K2-131b Pl 12 11 00.3783875832 -09 45 54.781040484           ~ 25 0
8 KOI-1843.03 Pl 19 00 03.1451105376 +40 13 14.798618364           ~ 26 0
9 Kepler-10b Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 297 1
10 Kepler-36b Pl 19 25 00.0428079600 +49 13 54.630900876           ~ 149 1
11 BD+38 3583b Pl 19 25 40.3885404552 +38 40 20.413186860           ~ 105 0
12 Kepler-78 EB* 19 34 58.0137407208 +44 26 53.960186940   12.87 11.72     K2 83 1
13 Kepler-78b Pl 19 34 58.0137407208 +44 26 53.960186940           ~ 140 1
14 WASP-47e Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 75 0
15 WASP-47 * 22 04 48.7261549272 -12 01 07.998743676     11.99 11.82   ~ 164 1
16 WASP-47b Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 94 1

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