A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b

التفاصيل البيبلوغرافية
العنوان: A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b
المؤلفون: 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.
المصدر: A&A 666, A10 (2022)
سنة النشر: 2022
المجموعة: Astrophysics
مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
الوصف: 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
نوع الوثيقة: Working Paper
DOI: 10.1051/0004-6361/202243731
URL الوصول: http://arxiv.org/abs/2206.10643
رقم الأكسشن: edsarx.2206.10643
قاعدة البيانات: arXiv
الوصف
DOI:10.1051/0004-6361/202243731