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TESS and HARPS reveal two sub-Neptunes around TOI 1062
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(2021) TESS and HARPS reveal two sub-Neptunes around TOI 1062. Astronomy & Astrophysics, 653 . A105. doi:10.1051/0004-6361/202040247 ISSN 0004-6361.
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WRAP-TESS-HARPS-reveal-two-sub-Neptunes-around-TOI-1062-Armstrong-2021.pdf - Accepted Version - Requires a PDF viewer. Download (6Mb) | Preview |
Official URL: http://dx.doi.org/10.1051/0004-6361/202040247
Abstract
The Transiting Exoplanet Survey Satellite (TESS) mission was designed to perform an all-sky search of planets around bright and nearby stars. Here we report the discovery of two sub-Neptunes orbiting around TOI 1062 (TIC 299799658), a V = 10.25 G9V star observed in the TESS Sectors 1, 13, 27, and 28. We use precise radial velocity observations from HARPS to confirm and characterize these two planets. TOI 1062b has a radius of 2.265−0.091+0.096 R⊕, a mass of 10.15 ± 0.8 M⊕, and an orbital period of 4.1130 ± 0.0015 days. The second planet is not transiting, has a minimum mass of 9.78−1.18+1.26 M⊕ and is near the 2:1 mean motion resonance with the innermost planet with an orbital period of 7.972−0.024+0.018 days. We performed a dynamical analysis to explore the proximity of the system to this resonance, and to attempt further constraining the orbital parameters. The transiting planet has a mean density of 4.85−0.74+0.84 g cm−3 and an analysis of its internal structure reveals that it is expected to have a small volatile envelope accounting for 0.35% of the mass at most. The star’s brightness and the proximity of the inner planet to what is know as the radius gap make it an interesting candidate for transmission spectroscopy, which could further constrain the composition and internal structure of TOI 1062b.
| 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 -- Detection, Satellites -- Orbits, Astrophysics, Neptune (Planet) -- Satellites | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Astronomy & Astrophysics | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Publisher: | EDP Sciences | |||||||||||||||||||||||||||||||||||||||||||||||||||
| ISSN: | 0004-6361 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Official Date: | September 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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| Volume: | 653 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Page Range: | A105 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI: | 10.1051/0004-6361/202040247 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | The original publication is available at http://dx.doi.org/10.1051/0004-6361/202040247 © ESO 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Date of first compliant deposit: | 5 November 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Date of first compliant Open Access: | 8 November 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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