List of exoplanets detected by microlensing
This article needs to be updated . Please help update this article to reflect recent events or newly available information. (August 2014 )
This is a list of exoplanets detected by gravitational microlensing . The phenomenon results in the background star's light being warped around a foreground object, causing a distorted image. If the foreground object is a star with an orbiting planet , we would observe an abnormally bright image. By comparing the luminosity and light distortion of the background star to theoretical models, we can estimate the planet's mass and the distance from its star.
The least massive planet detected by microlensing is KMT-2020-BLG-0414L b, which has a mass about 1.9 times the mass of earth , or OGLE-2013-BLG-0341LBb, which has a mass about 2 times the mass of earth.[ 1] [ 2] AU ; the shortest separation is MOA-2015-BLG-337Lb, which is 0.24 AU. There are 7 known multi-planetary systems detected by microlensing, all of which have two planets.[ 3]
List
Yellow rows denote the members of multi-planet systems. Green rows denote the members of multi-star systems.
Candidate rogue planets
A number of candidate rogue planets have been detected by microlensing.
Unconfirmed detections
Some microlensing events, such as MACHO-98-BLG-35 and PA-99-N2 , suggest the possible presence of a planetary companion to the lensing star, but this is unconfirmed. Since microlensing relies on a one-time chance alignment, it is likely not possible to confirm these detections.
In some cases, a planetary interpretation for a microlensing event was proposed, but has been disproven. MACHO-1997-BLG-41 was initially interpreted as a binary star system orbited by a circumbinary planet , but a different model with two stars and no planet was later found to be a better fit to the data. Similarly, OGLE-2013-BLG-0723L was initially interpreted as a binary system of a star and a brown dwarf , with a low-mass planet orbiting the brown dwarf, but a model where the system consists of two low-mass stars with no planet was found to be a better fit to the data.[ 168]
See also
Notes
^ The nature of the observed system is unclear. It is either a rogue planet with about 3.2 M J masses and a 0.5 M E exomoon or a red dwarf with 18 M E planet.
References
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"KMT-2021-BLG-0322: Severe degeneracy between triple-lens and higher-order binary-lens interpretations" . Astronomy and Astrophysics . 655 : A24. arXiv :2109.02210 Bibcode :2021A&A...655A..24H . doi :10.1051/0004-6361/202141939 . ISSN 0004-6361 . ^ a b Zang, Weicheng; Han, Cheongho; Kondo, Iona; Yee, Jennifer C.; Lee, Chung-Uk; Gould, Andrew; Mao, Shude; de Almeida, Leandro; Shvartzvald, Yossi; Zhang, Xiangyu; Albrow, Michael D.; Chung, Sun-Ju; Hwang, Kyu-Ha; Jung, Youn Kil; Ryu, Yoon-Hyun (2021-11-01). "An Earth-mass planet in a time of COVID-19: KMT-2020-BLG-0414Lb" . Research in Astronomy and Astrophysics . 21 (9): 239. arXiv :2103.01896 Bibcode :2021RAA....21..239Z . doi :10.1088/1674-4527/21/9/239 . ISSN 1674-4527 . ^ Han, Cheongho; Udalski, Andrzej; Kim, Doeon; Kil Jung, Youn; Lee, Chung-Uk; Bond, Ian A.; Albrow, Michael D.; Chung, Sun-Ju; Gould, Andrew; Hwang, Kyu-Ha; Kim, Hyoun-Woo; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Zang, Weicheng (2021-06-01). "KMT-2019-BLG-1715: Planetary Microlensing Event with Three Lens Masses and Two Source Stars" . The Astronomical Journal . 161 (6): 270. arXiv :2104.00293 Bibcode :2021AJ....161..270H . doi :10.3847/1538-3881/abf4d0 ISSN 0004-6256 . ^ Kim, Yun Hak; et al. (2021). "KMT-2019-BLG-0371 and the Limits of Bayesian Analysis" . The Astronomical Journal . 162 (1): 17. arXiv :2101.12206 Bibcode :2021AJ....162...17K . doi :10.3847/1538-3881/abf930 S2CID 231728667 . ^ Han, Cheongho; Albrow, Michael D.; Chung, Sun-Ju; Gould, Andrew; Hwang, Kyu-Ha; Jung, Youn Kil; Kim, Doeon; Kim, Hyoun-Woo; Lee, Chung-Uk; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer C.; Zang, Weicheng; Cha, Sang-Mok (2021-08-01). "KMT-2018-BLG-1743: planetary microlensing event occurring on two source stars" . Astronomy and Astrophysics . 652 : A145. arXiv :2107.00155 Bibcode :2021A&A...652A.145H . doi :10.1051/0004-6361/202140923 . 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The Astronomical Journal . 162 (3): 96. arXiv :2104.07906 Bibcode :2021AJ....162...96R . doi :10.3847/1538-3881/ac062a ISSN 0004-6256 . ^ Kuang, Renkun; Zang, Weicheng; Jung, Youn Kil; Udalski, Andrzej; Yang, Hongjing; Mao, Shude; Albrow, Michael D.; Chung, Sun-Ju; Gould, Andrew; Han, Cheongho; Hwang, Kyu-Ha; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer C. (2022-10-01). "OGLE-2019-BLG-1470LABc: Another microlensing giant planet in a binary system?" . Monthly Notices of the Royal Astronomical Society . 516 (2): 1704–1720. arXiv :2204.05606 Bibcode :2022MNRAS.516.1704K . doi :10.1093/mnras/stac2315 ISSN 0035-8711 . ^ a b c d e f Hwang, Kyu-Ha; Zang, Weicheng; Gould, Andrew; Udalski, Andrzej; Bond, Ian A.; Yang, Hongjing; Mao, Shude; Mao, Shude; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Kil Jung, Youn; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi (2022-02-01). "Systematic KMTNet Planetary Anomaly Search. II. Six New q < 2 × 10-4 Mass-ratio Planets" . The Astronomical Journal . 163 (2): 43. arXiv :2106.06686 Bibcode :2022AJ....163...43H . doi :10.3847/1538-3881/ac38ad ISSN 0004-6256 . ^ a b Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk; Kim, Doeon; Zhu, Wei; Albrow, Michael D.; Chung, Sun-Ju; Gould, Andrew; Hwang, Kyu-Ha; Jung, Youn Kil; Kim, Hyoun-Woo; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer C. (2022-02-01). "OGLE-2019-BLG-0468Lb,c: Two microlensing giant planets around a G-type star" . Astronomy and Astrophysics . 658 : A93. arXiv :2111.03755 Bibcode :2022A&A...658A..93H . doi :10.1051/0004-6361/202142327 . ISSN 0004-6361 . ^ Chung, Sun-Ju; Yee, Jennifer C.; Udalski, Andrej; Gould, Andrew; Albrow, Michael D.; Jung, Youn Kil; Hwang, Kyu-Ha; Han, Cheongho; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Zang, Weicheng; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Seung-Lee (2022-08-01). "OGLE-2019-BLG-0362Lb: A Super-Jovian-Mass Planet around a Low-Mass Star" . 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"Four sub-Jovian-mass planets detected by high-cadence microlensing surveys" . Astronomy and Astrophysics . 664 : A33. arXiv :2205.10510 Bibcode :2022A&A...664A..33H . doi :10.1051/0004-6361/202243484 . ISSN 0004-6361 . ^ Zang, Weicheng; Shvartzvald, Yossi; Udalski, Andrzej; Yee, Jennifer C.; Lee, Chung-Uk; Sumi, Takahiro; Zhang, Xiangyu; Yang, Hongjing; Mao, Shude; Novati, Sebastiano Calchi; Gould, Andrew; Zhu, Wei; Beichman, Charles A.; Bryden, Geoffery; Carey, Sean (2022-08-01). "OGLE-2018-BLG-0799Lb: a q 2.7 × 10-3 planet with Spitzer parallax" . Monthly Notices of the Royal Astronomical Society . 514 (4): 5952–5968. arXiv :2010.08732 Bibcode :2022MNRAS.514.5952Z . doi :10.1093/mnras/stac1631 ISSN 0035-8711 . ^ Shin, In-Gu; Yee, Jennifer C.; Hwang, Kyu-Ha; Gould, Andrew; Udalski, Andrzej; Bond, Ian A.; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Kil Jung, Youn; Woo Kim, Hyoun; Ryu, Yoon-Hyun; Shvartzvald, Yossi; Zang, Weicheng; Cha, Sang-Mok (2022-06-01). 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