TOI-908: a planet at the edge of the Neptune desert transiting a G-type star

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Hawthorn, F (Author) Other; Bayliss, D (Author) Other; Armstrong, DJ (Author) Other; Fernandez, JF (Author) Other; Osborn, A (Author) Other; Sousa, SG (Author) FCUP; Adibekyan, V (Author) Other; Davoult, J (Author) Other; Collins, KA (Author) Other; Alibert, Y (Author) Other; Barros, SCC (Author) FCUP; Bouchy, F (Author) Other; Brogi, M (Author) Other; Ciardi, DR (Author) Other; Daylan, T (Author) Other; Mena, ED (Author) FCUP; Demangeon, ODS (Author) Other; Diaz, RF (Author) Other; Gan, TJ (Author) Other; Horne, K (Author) Other; Hoyer, S (Author) Other; Jenkins, JM (Author) Other; Jensen, ELN (Author) Other; Kielkopf, JF (Author) Other; Kostov, V (Author) Other; Latham, DW (Author) Other; Levine, AM (Author) Other; Lillo-Box, J (Author) Other; Nielsen, LD (Author) Other; Osborn, HP (Author) Other; Ricker, GR (Author) Other; Rodrigues, J (Author) Other; N.C. Santos (Author) FCUP; Schwarz, RP (Author) Other; Seager, S (Author) Other; Bell, JS (Author) Other; Shporer, A (Author) Other; Stockdale, C (Author) Other; Strom, PA (Author) Other; Tenenbaum, P (Author) Other; Udry, S (Author) Other; Wheatley, PJ (Author) Other; Winn, JN (Author) Other; Ziegler, C (Author) Other

Journal

Title: Monthly Notices of the Royal Astronomical Society

Vol. 524

Pages: 3877-3893

ISSN: 0035-8711

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00Y-XEH

DOI: 10.1093/mnras/stad1840

Abstract (EN): We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28, and 39. TOI-908 is a T = 10.7 mag G-dwarf (T-eff = 5626 +/- 61 K) solar-like star with a mass of 0.950 +/- 0.010 M (circle dot) and a radius of 1.028 +/- 0.030 R-circle dot. The planet, TOI-908 b, is a 3.18 +/- 0.16 R-circle plus planet in a 3.18 d orbit. Radial velocity measurements from HARPS reveal TOI-908 b has a mass of approximately 16.1 +/- 4.1 M-circle plus, resulting in a bulk planetary density of 2.7(-0.4)(+0.2) g cm(-3). TOI-908 b lies in a sparsely populated region of parameter space known as the Neptune desert. The planet likely began its life as a sub-Saturn planet before it experienced significant photoevaporation due to X-rays and extreme ultraviolet radiation from its host star, and is likely to continue evaporating, losing a significant fraction of its residual envelope mass.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17