University of Hertfordshire

Search for nearby Earth analogs I. 15 planet candidates found in PFS data

Research output: Contribution to journalArticle

Documents

  • 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
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Original languageEnglish
Article number25
JournalAstrophysical Journal Supplement
Journal publication date17 Jun 2019
Volume242
Issue2
DOIs
Publication statusPublished - 17 Jun 2019

Abstract

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.

Notes

30 pages, 20 figures, 3 tables, accepted for publication in ApJS

ID: 16697818