Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts

Jacob K. Luhn, Fabienne A. Bastien, Jason T. Wright, John A. Johnson, Andrew W. Howard, Howard Isaacson

Research output: Contribution to journalArticle

2 Scopus citations


We present the discovery of seven new planets and eight planet candidates around subgiant stars, as additions to the known sample of planets around "retired A stars. " Among these are the possible first three-planet systems around subgiant stars, HD 163607 and HD 4917. Additionally, we present calculations of possible transit times, durations, depths, and probabilities for all known planets around subgiant (3 < log g < 4) stars, focused on possible transits during the TESS mission. While most have transit probabilities of 1%-2%, we find that there are three planets with transit probabilities >9%.

Original languageEnglish (US)
Article number149
JournalAstronomical Journal
Issue number4
StatePublished - Apr 2019


All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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