期刊
ASTRONOMICAL JOURNAL
卷 154, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/aa832d
关键词
eclipses; stars: individual (HD 3167); techniques: photometric; techniques: spectroscopic
资金
- NASA Astrophysics Data Analysis Program grant
- K2 Guest Observer Program
- National Science Foundation [2014184874]
- European Union Seventh Framework Program (FP7) [313014]
- John Templeton Foundation
- NASA [NNX15AC90G, NNX17AB59G, NAS5-26555]
- NASA Office of Space Science [NNX09AF08G]
- U.S. Government [NAG W-2166]
- NASA [1003941, NNX17AB59G, 808641, NNX15AC90G] Funding Source: Federal RePORTER
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1753582] Funding Source: National Science Foundation
- STFC [ST/P000312/1, ST/M001296/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M001296/1] Funding Source: researchfish
HD 3167 is a bright (V = 8.9), nearby KO star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a multi-site, multi-instrument radial-velocity campaign to characterize the HD 3167 system. The masses of the transiting planets are 5.02 +/- 0.38 M-circle plus for HD 3167 b, a hot super-Earth with a likely rocky composition (rho(b) = 5.6(-1.43)(+2.15) g cm(-3)), and 9.80(-1.24)(+1.30) M-circle plus for HD 3167 c, a warm sub-Neptune with a likely substantial volatile complement (rho(c) = 1.97(-0.59)(+0.94) g cm(-3)). We explore the possibility of atmospheric composition analysis and determine that planet c is amenable to transmission spectroscopy measurements, and planet b is a potential thermal emission target. We detect a third, non-transiting planet, HD 3167 d, with a period of 8.509 +/- 0.045 d (between planets b and c) and a minimum mass of 6.90 +/- 0.71 M-circle plus. We are able to constrain the mutual inclination of planet d with planets b and c: we rule out mutual inclinations below 1.degrees 3 because we do not observe transits of planet d. From 1.degrees 3 to 40 degrees, there are viewing geometries invoking special nodal configurations, which result in planet d not transiting some fraction of the time.
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