2018AJ....155..203H

Query : 2018AJ....155..203H

2018AJ....155..203H - Astron. J., 155, 203-203 (2018/May-0)

An accurate mass determination for Kepler-1655b, a moderately irradiated world with a significant volatile envelope.

HAYWOOD R.D., VANDERBURG A., MORTIER A., GILES H.A.C., LOPEZ-MORALES M., LOPEZ E.D., MALAVOLTA L., CHARBONNEAU D., COLLIER CAMERON A., COUGHLIN J.L., DRESSING C.D., NAVA C., LATHAM D.W., DUMUSQUE X., LOVIS C., MOLINARI E., PEPE F., SOZZETTI A., UDRY S., BOUCHY F., JOHNSON J.A., MAYOR M., MICELA G., PHILLIPS D., PIOTTO G., RICE K., SASSELOV D., SEGRANSAN D., WATSON C., AFFER L., BONOMO A.S., BUCHHAVE L.A., CIARDI D.R., FIORENZANO A.F. and HARUTYUNYAN A.

Abstract (from CDS):

We present the confirmation of a small, moderately irradiated (F = 155 ± 7 F⊕) Neptune with a substantial gas envelope in a P = 11.8728787 ± 0.0000085 day orbit about a quiet, Sun-like G0V star Kepler-1655. Based on our analysis of the Kepler light curve, we determined Kepler-1655b's radius to be 2.213 ± 0.082 R⊕. We acquired 95 high-resolution spectra with Telescopio Nazionale Galileo/HARPS-N, enabling us to characterize the host star and determine an accurate mass for Kepler-1655b of 5.0±2.83.1M⊕ via Gaussian-process regression. Our mass determination excludes an Earth-like composition with 98% confidence. Kepler-1655b falls on the upper edge of the evaporation valley, in the relatively sparsely occupied transition region between rocky and gas-rich planets. It is therefore part of a population of planets that we should actively seek to characterize further.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: individual: (Kepler-1655, KOI-280, KIC 4141376, 2MASS J19064546+3912428) - planets and satellites: detection - planets and satellites: gaseous planets

VizieR on-line data: <Available at CDS (J/AJ/155/203): table4.dat>

Simbad objects: 11

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Number of rows : 11
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 NAME G 268-38b Pl 00 44 59.3309137511 -15 16 17.542839990           ~ 237 0
2 NAME G Cloud Cld 03 00 +50.2           ~ 85 0
3 NAME LIC Cld 04 41 +31.           ~ 317 0
4 CoRoT-7 * 06 43 49.4690164104 -01 03 46.826642700   12.78 11.73 11.36 10.87 K0V 232 1
5 * alf Cen Bb err 14 39 35.0 -60 50 15           ~ 48 2
6 NAME Mic Cloud Cld 18 10 +13.           ~ 15 0
7 Kepler-4b Pl 19 02 27.6979514832 +50 08 08.703945600           ~ 105 1
8 Kepler-1655 Er* 19 06 45.4641571944 +39 12 42.966734328   11.62 11.05 11.011   F5 87 0
9 Kepler-1655b Pl 19 06 45.4641571944 +39 12 42.966734328           ~ 35 0
10 HD 179070 Er* 19 09 26.8349590368 +38 42 50.455534860   8.767 8.25 8.00   F6IV 200 1
11 Kepler-78 EB* 19 34 58.0137407208 +44 26 53.960186940   12.87 11.72     K2.5V 98 1

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