期刊
ASTRONOMY & ASTROPHYSICS
卷 575, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201423591
关键词
planetary systems; stars: individual: WASP-20b; stars: individual: WASP-28b
资金
- UK's Science and Technology Facilities Council
- Swiss National Science Foundation [PBGEP2-145594]
- STFC [ST/I000666/1, ST/I001719/1, ST/J00152X/1, ST/L000733/1, ST/J001651/1, ST/K006126/1, ST/G001006/1, ST/L00139X/1, PP/D000890/1, ST/M001296/1, PP/F000065/1, ST/J000027/1, PP/F000073/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J00152X/1, PP/F000065/1, ST/M001296/1, ST/L00139X/1, ST/I000666/1, ST/K006126/1, ST/G001006/1, ST/I001719/1, ST/L000733/1, ST/J000027/1, PP/D000890/1, ST/J001651/1] Funding Source: researchfish
- Swiss National Science Foundation (SNF) [PBGEP2_145594] Funding Source: Swiss National Science Foundation (SNF)
We report the discovery of the planets WASP-20b and WASP-28b along with measurements of their sky-projected orbital obliquities. WASP-20b is an inflated, Saturn-mass planet (0.31 M-Jup; 1.46 R-Jup) in a 4.9-day, near-aligned (lambda = 12.7 +/- 4.2.) orbit around CD-24 102 (V = 10.7; F9). Due to the low density of the planet and the apparent brightness of the host star, WASP-20 is a good target for atmospheric characterisation via transmission spectroscopy. WASP-28b is an inflated, Jupiter-mass planet (0.91 M-Jup; 1.21 R-Jup) in a 3.4-day, near-aligned (lambda = 8 +/- 18 degrees) orbit around a V = 12, F8 star. As intermediate-mass planets in short orbits around aged, cool stars (7(-1)(+2) Gyr and 6000 +/- 100 K for WASP-20; 5(-2)(+3) Gyr and 6100 +/- 150 K for WASP-28), their orbital alignment is consistent with the hypothesis that close-in giant planets are scattered into eccentric orbits with random alignments, which are then circularised and aligned with their stars' spins via tidal dissipation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据