What do Planetary Architectures Really Look Like? New Insights from EXPRES.
Abstract
Our view of planetary system architectures is heavily influenced by the biases in our detection methods. Transit survey statistics tell us that there are plenty of small planets, between the radius of Earth and Neptune, at least on orbits shorter than about 40 days. RV surveys have identified a handful of these interior planets, but their small size has limited their detection, even at these close-in orbits. The long time baselines of RV surveys have allowed us to identify many longer period planets, but they are typically larger than Neptune. This leaves large gaps in our knowledge, even in well studied systems. Extreme Precision RV instruments are starting to fill in those gaps. The EXtreme PREcision Spectrometer (EXPRES) and the high cadence 100 Earths Survey has been searching for these missing planets since August 2019. We have found new planets in systems that have been observed for 30 years. I will present our latest results including new planet detections and our plans to reach even smaller signals.
- Publication:
-
American Astronomical Society Meeting Abstracts #243
- Pub Date:
- February 2024
- Bibcode:
- 2024AAS...24335201B