Searching for Giant Exoplanets around M-dwarf Stars (GEMS) I: Survey Motivation
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| Format: | Preprint |
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2024
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| author | Kanodia, Shubham Cañas, Caleb I. Mahadevan, Suvrath Ford, Eric B. Helled, Ravit Anderson, Dana E. Boss, Alan Cochran, William D. Delamer, Megan Han, Te Libby-Roberts, Jessica E. Lin, Andrea S. J. Müller, Simon Robertson, Paul Stefánsson, Guðmundur Teske, Johanna |
| author_facet | Kanodia, Shubham Cañas, Caleb I. Mahadevan, Suvrath Ford, Eric B. Helled, Ravit Anderson, Dana E. Boss, Alan Cochran, William D. Delamer, Megan Han, Te Libby-Roberts, Jessica E. Lin, Andrea S. J. Müller, Simon Robertson, Paul Stefánsson, Guðmundur Teske, Johanna |
| contents | Recent discoveries of transiting giant exoplanets around M-dwarf stars (GEMS), aided by the all-sky coverage of TESS, are starting to stretch theories of planet formation through the core-accretion scenario. Recent upper limits on their occurrence suggest that they decrease with lower stellar masses, with fewer GEMS around lower-mass stars compared to solar-type. In this paper, we discuss existing GEMS both through confirmed planets, as well as protoplanetary disk observations, and a combination of tests to reconcile these with theoretical predictions. We then introduce the \textit{Searching for GEMS} survey, where we utilize multi-dimensional nonparameteric statistics to simulate hypothetical survey scenarios to predict the required sample size of transiting GEMS with mass measurements to robustly compare their bulk-density with canonical hot-Jupiters orbiting FGK stars. Our Monte-Carlo simulations predict that a robust comparison requires about 40 transiting GEMS (compared to the existing sample of $\sim$ 15) with 5-$σ$ mass measurements. Furthermore, we discuss the limitations of existing occurrence estimates for GEMS, and provide a brief description of our planned systematic search to improve the occurrence rate estimates for GEMS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_04946 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Searching for Giant Exoplanets around M-dwarf Stars (GEMS) I: Survey Motivation Kanodia, Shubham Cañas, Caleb I. Mahadevan, Suvrath Ford, Eric B. Helled, Ravit Anderson, Dana E. Boss, Alan Cochran, William D. Delamer, Megan Han, Te Libby-Roberts, Jessica E. Lin, Andrea S. J. Müller, Simon Robertson, Paul Stefánsson, Guðmundur Teske, Johanna Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Recent discoveries of transiting giant exoplanets around M-dwarf stars (GEMS), aided by the all-sky coverage of TESS, are starting to stretch theories of planet formation through the core-accretion scenario. Recent upper limits on their occurrence suggest that they decrease with lower stellar masses, with fewer GEMS around lower-mass stars compared to solar-type. In this paper, we discuss existing GEMS both through confirmed planets, as well as protoplanetary disk observations, and a combination of tests to reconcile these with theoretical predictions. We then introduce the \textit{Searching for GEMS} survey, where we utilize multi-dimensional nonparameteric statistics to simulate hypothetical survey scenarios to predict the required sample size of transiting GEMS with mass measurements to robustly compare their bulk-density with canonical hot-Jupiters orbiting FGK stars. Our Monte-Carlo simulations predict that a robust comparison requires about 40 transiting GEMS (compared to the existing sample of $\sim$ 15) with 5-$σ$ mass measurements. Furthermore, we discuss the limitations of existing occurrence estimates for GEMS, and provide a brief description of our planned systematic search to improve the occurrence rate estimates for GEMS. |
| title | Searching for Giant Exoplanets around M-dwarf Stars (GEMS) I: Survey Motivation |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2402.04946 |