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TOI-1259Ab – a gas giant planet with 2.7 per cent deep transits and a bound white dwarf companion
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(2021) TOI-1259Ab – a gas giant planet with 2.7 per cent deep transits and a bound white dwarf companion. Monthly Notices of the Royal Astronomical Society, 507 (3). pp. 4132-4148. doi:10.1093/mnras/stab2129
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Official URL: https://doi.org/10.1093/mnras/stab2129
Abstract
We present TOI-1259Ab, a 1.0RJup gas giant planet transiting a 0.71R⊙ K-dwarf on a 3.48 d orbit. The system also contains a bound white dwarf companion TOI-1259B with a projected distance of ∼1600 au from the planet host. Transits are observed in nine TESS sectors and are 2.7 per cent deep – among the deepest known – making TOI-1259Ab a promising target for atmospheric characterization. Our follow-up radial velocity measurements indicate a variability of semiamplitude $K=71\, \rm m\, s^{-1}$, implying a planet mass of 0.44MJup. By fitting the spectral energy distribution of the white dwarf, we derive a total age of $4.08^{+1.21}_{-0.53}$ Gyr for the system. The K dwarf’s light curve reveals rotational variability with a period of 28 d, which implies a gyrochronology age broadly consistent with the white dwarf’s total age.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | ||||||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Outer planets , Outer planets -- Atmospheres , White dwarf stars , Double stars, Low mass stars , Eclipsing binaries | ||||||||||||||||||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||||||||||||||
| Publisher: | Oxford University Press (OUP) | ||||||||||||||||||||||||||||||
| ISSN: | 1365-2966 | ||||||||||||||||||||||||||||||
| Official Date: | 27 July 2021 | ||||||||||||||||||||||||||||||
| Dates: |
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| Volume: | 507 | ||||||||||||||||||||||||||||||
| Number: | 3 | ||||||||||||||||||||||||||||||
| Page Range: | pp. 4132-4148 | ||||||||||||||||||||||||||||||
| DOI: | 10.1093/mnras/stab2129 | ||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||||||||
| Publisher Statement: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society | ||||||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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