학술논문
A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b
Document Type
Working Paper
Author
Esparza-Borges, E.; Parviainen, H.; Murgas, F.; Pallé, E.; Maas, A.; Morello, G.; Zapatero-Osorio, M. R.; Barkaoui, K.; Narita, N.; Fukui, A.; Casasayas-Barris, N.; Oshagh, M.; Crouzet, N.; Galán, D.; Fernández, G. E.; Kagetani, T.; Kawauchi, K.; Kodama, T.; Korth, J.; Kusakabe, N.; Laza-Ramos, A.; Luque, R.; Livingston, J.; Madrigal-Aguado, A.; Mori, M.; Orell-Miquel, J.; Puig-Subirá, M.; Stangret, M.; Terada, Y.; Watanabe, N.; Zou, Y.; Savel, A. Baliga; Belinski, A. A.; Collins, K.; Dressing, C. D.; Giacalone, S.; Gill, H.; Goliguzova, M. V.; Ikoma, M.; Jenkins, J. M.; Tamura, M.; Twicken, J. D.; Ricker, G. R.; Schwarz, R. P.; Seager, S.; Shporer, A.; Vanderspek, R.; Winn, J.
Source
A&A 666, A10 (2022)
Subject
Language
Abstract
We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b. We have jointly analyzed space (TESS mission) and ground based (MuSCAT2, MuSCAT3 and SINISTRO instruments) lightcurves using our multi-color photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates and validate them as planet-sized companions. We found TOI-4479b to be a sub-Neptune-sized planet ($R_{p}=2.82^{+0.65}_{-0.63}~\rm R_{\oplus}$) and TOI-2081b to be a super-Earth-sized planet ($R_{p}=2.04^{+0.50}_{-0.54}~\rm R_{\oplus}$). Furthermore, we obtained that TOI-4479b, with a short orbital period of $1.15890^{+0.00002}_{-0.00001}~\rm days$, lies within the Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date. These results make TOI-4479b rare among the currently known exoplanet population around M dwarf stars, and an especially interesting target for spectroscopic follow-up and future studies of planet formation and evolution.
Comment: Accepted for publication in Astronomy&Astrophysics
Comment: Accepted for publication in Astronomy&Astrophysics