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25 April 2024 |
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Search for nearby Earth analogs I. 15 planet candidates found in PFS data | | Fabo Feng
; Jeffrey D. Crane
; Sharon Xuesong Wang
; Johanna K. Teske
; Stephen A. Shectman
; Matías R. Díaz
; Ian B. Thompson
; Hugh R. A. Jones
; R. Paul Butler
; | | Date: |
18 Apr 2019 | | Abstract: | The radial velocity method plays a major role in the discovery of nearby
exoplanets. To efficiently find planet candidates from the data obtained in
high precision radial velocity surveys, we apply a signal diagnostic framework
to detect radial velocity signals that are statistically significant,
consistent in time, robust to the choice of noise models, and not correlated
with stellar activity. Based on the application of this approach to the survey
data of the Planet Finder Spectrograph (PFS), we report fifteen planet
candidates located in fourteen 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
demonstate the feasibility of automated detection of exoplanets from large
radial velocity surveys, which may provide a complete sample of nearby Earth
analogs. | | Source: | arXiv, 1904.8567 | | Services: | Forum | Review | PDF | Favorites | |
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