Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts
Abstract
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%.
- Publication:
-
The Astronomical Journal
- Pub Date:
- April 2019
- DOI:
- arXiv:
- arXiv:1811.03043
- Bibcode:
- 2019AJ....157..149L
- Keywords:
-
- planets and satellites: detection;
- planets and satellites: fundamental parameters;
- techniques: radial velocities;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 30 pages, 24 figures, accepted for publication in The Astrophysical Journal. Machine-readable tables included in source download. A coauthor was accidentally omitted in version 1. Version 2 also includes clarification on the calculated transit probabilities. Version 3 fixes small errors in Tables 3 and 5
