TY - JOUR
T1 - Search for nearby Earth analogs I. 15 planet candidates found in PFS data
AU - Feng, Fabo
AU - Crane, Jeffrey D.
AU - Wang, Sharon Xuesong
AU - Teske, Johanna K.
AU - Shectman, Stephen A.
AU - Díaz, Matías R.
AU - Thompson, Ian B.
AU - Jones, Hugh R. A.
AU - Butler, R. Paul
N1 - 30 pages, 20 figures, 3 tables, accepted for publication in ApJS
PY - 2019/6/17
Y1 - 2019/6/17
N2 - The radial velocity (RV) method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high-precision RV surveys, we apply a signal diagnostic framework to detect RV signals that are statistically significant, consistent in time, robust in the choice of noise models, and do not correlated with stellar activity. Based on the application of this approach to the survey data of the Planet Finder Spectrograph, we report 15 planet candidates located in 14 stellar systems. We find that the orbits of the planet candidates around HD 210193, 103949, 8326, and 71135 are consistent with temperate zones around these stars (where liquid water could exist on the surface). With periods of 7.76 and 15.14 days, respectively, the planet candidates around star HIP 54373 form a 1:2 resonance system. These discoveries demonstrate the feasibility of automated detection of exoplanets from large RV surveys, which may provide a complete sample of nearby Earth analogs.
AB - The radial velocity (RV) method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high-precision RV surveys, we apply a signal diagnostic framework to detect RV signals that are statistically significant, consistent in time, robust in the choice of noise models, and do not correlated with stellar activity. Based on the application of this approach to the survey data of the Planet Finder Spectrograph, we report 15 planet candidates located in 14 stellar systems. We find that the orbits of the planet candidates around HD 210193, 103949, 8326, and 71135 are consistent with temperate zones around these stars (where liquid water could exist on the surface). With periods of 7.76 and 15.14 days, respectively, the planet candidates around star HIP 54373 form a 1:2 resonance system. These discoveries demonstrate the feasibility of automated detection of exoplanets from large RV surveys, which may provide a complete sample of nearby Earth analogs.
KW - astro-ph.EP
KW - Instrumentation: spectrographs
KW - Planets and satellites: general
KW - Techniques: radial velocities
KW - Stars: activity
KW - Methods: numerical
UR - http://www.scopus.com/inward/record.url?scp=85069967141&partnerID=8YFLogxK
U2 - 10.3847/1538-4365/ab1b16
DO - 10.3847/1538-4365/ab1b16
M3 - Article
SN - 0067-0049
VL - 242
JO - Astrophysical Journal Supplement
JF - Astrophysical Journal Supplement
IS - 2
M1 - 25
ER -