In:
The Astronomical Journal, American Astronomical Society, Vol. 155, No. 5 ( 2018-05-01), p. 203-
Abstract:
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 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.
Type of Medium:
Online Resource
ISSN:
0004-6256
,
1538-3881
DOI:
10.3847/1538-3881/aab8f3
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2018
detail.hit.zdb_id:
127191-X
detail.hit.zdb_id:
2003104-X
SSG:
16,12