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TOI-2498 b : a hot bloated super-neptune within the neptune desert
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(2023) TOI-2498 b : a hot bloated super-neptune within the neptune desert. Monthly Notices of the Royal Astronomical Society, 523 (1). pp. 1163-1174. doi:10.1093/mnras/stad1452 ISSN 0035-8711.
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Official URL: http://doi.org/10.1093/mnras/stad1452
Abstract
We present the discovery and confirmation of a transiting hot, bloated Super-Neptune using photometry from TESS and LCOGT and radial velocity measurements from HARPS. The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 days, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high-resolution, and for carbon based molecules in the infra-red using JWST.
Item Type: | Journal Article | |||||||||||||||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | |||||||||||||||||||||||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Extrasolar planets, Extrasolar planets -- Detection, Neptune (Planet), Astrophysics, Astronomical photometry, Solar flares | |||||||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||||||||||||||||||||||||||||||||||||||
Publisher: | Oxford University Press | |||||||||||||||||||||||||||||||||||||||||||||
ISSN: | 0035-8711 | |||||||||||||||||||||||||||||||||||||||||||||
Official Date: | 2023 | |||||||||||||||||||||||||||||||||||||||||||||
Dates: |
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Volume: | 523 | |||||||||||||||||||||||||||||||||||||||||||||
Number: | 1 | |||||||||||||||||||||||||||||||||||||||||||||
Page Range: | pp. 1163-1174 | |||||||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1093/mnras/stad1452 | |||||||||||||||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 17 May 2023 | |||||||||||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 17 May 2023 | |||||||||||||||||||||||||||||||||||||||||||||
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