Exoplanets & Exomoons

9 New M Dwarf Planet Candidates From TESS Including 5 Gas Giants

By Keith Cowing
Status Report
June 13, 2024
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9 New M Dwarf Planet Candidates From TESS Including 5 Gas Giants
Phase curves for the 9 planet candidates, showing TESS data in black. Orange lines show fitted transit models, while orange circles represent the underlying data averaged every 15 minutes. — astro-ph.EP

We present the detection of 9 new planet candidates orbiting M dwarfs, identified using an independent search and vetting pipeline applied to TESS Full-Frame Image (FFI) data from Sectors 1 to 63. Our candidates include planets as small as 1.4 R, with orbital periods up to 20 days.

Among the 9 new candidates, we identified 5 gas giants, which represent a rare and unexpected outcome of planet formation. Our findings add to the growing sample of giant planets around M dwarfs found by TESS. We discuss their follow-up potential for mass measurements through radial velocity observations and atmospheric characterization through transmission spectroscopy.

We highlight TIC 12999193.01 as a particularly unique gas giant candidate in an eccentric orbit and excellent potential for atmospheric characterisation.

Difference images produced for each surviving candidate, made from the pixel time series of their most recently observed sectors. The pink star in each image indicates the location of the target star, showing that all passing candidates are consistent with on-target transiting planets. — astro-ph.EP

Yoshi Nike Emilia Eschen, Michelle Kunimoto

Comments: 8 pages, 6 figures, 4 tables, accepted to MNRAS
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2406.06688 [astro-ph.EP] (or arXiv:2406.06688v1 [astro-ph.EP] for this version)
Submission history
From: Yoshi Eschen
[v1] Mon, 10 Jun 2024 18:00:05 UTC (1,827 KB)

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻