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Four sub-Jovian-mass planets detected by high-cadence microlensing surveys
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The KMTNet Collaboration, The OGLE Collaboration, The MOA Collaboration (Including: Ulaczyk, Krzysztof). (2022) Four sub-Jovian-mass planets detected by high-cadence microlensing surveys. Astronomy & Astrophysics, 664 . A33. doi:10.1051/0004-6361/202243484 ISSN 0004-6361.
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Official URL: https://doi.org/10.1051/0004-6361/202243484
Abstract
Aims. With the aim of finding short-term planetary signals, we investigated the data collected from current high-cadence microlensing surveys.
Methods. From this investigation, we found four planetary systems with low planet-to-host mass ratios, including OGLE-2017-BLG-1691L, KMT-2021-BLG-0320L, KMT-2021-BLG-1303L, and KMT-2021-BLG-1554L. Despite the short durations, ranging from a few hours to a couple of days, the planetary signals were clearly detected by the combined data of the lensing surveys. We found that three of the planetary systems have mass ratios on the order of 10−4 and the other has a mass ratio that is slightly greater than 10−3.
Results. The estimated masses indicate that all discovered planets have sub-Jovian masses. The planet masses of KMT-2021-BLG-0320Lb, KMT-2021-BLG-1303Lb, and KMT-2021-BLG-1554Lb correspond to ~0.10, ~0.38, and ~0.12 times the mass of the Jupiter, and the mass of OGLE-2017-BLG-1691Lb corresponds to that of the Uranus. The estimated mass of the planet host KMT-2021-BLG-1554L, Mhost ~ 0.08 M⊙, corresponds to the boundary between a star and a brown dwarf. Besides this system, the host stars of the other planetary systems are low-mass stars with masses in the range of ~[0.3–0.6] M⊙. The discoveries of the planets fully demonstrate the capability of the current high-cadence microlensing surveys in detecting low-mass planets.
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): | Microlensing (Astrophysics) , Outer planets , Planetary systems , Low mass stars | |||||||||||||||||||||||||||||||||
Journal or Publication Title: | Astronomy & Astrophysics | |||||||||||||||||||||||||||||||||
Publisher: | EDP Sciences | |||||||||||||||||||||||||||||||||
ISSN: | 0004-6361 | |||||||||||||||||||||||||||||||||
Official Date: | 5 August 2022 | |||||||||||||||||||||||||||||||||
Dates: |
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Volume: | 664 | |||||||||||||||||||||||||||||||||
Article Number: | A33 | |||||||||||||||||||||||||||||||||
DOI: | 10.1051/0004-6361/202243484 | |||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 12 October 2022 | |||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 12 October 2022 | |||||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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