WASP-189 b

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WASP-189 b
Discovery
Discovery date2018
Transit [1] [2]
Orbital characteristics
0.05053
2.72 d
StarWASP-189 (HD 133112)
Physical characteristics
1.600+0.017
−0.016 RJ
Mass 1.99 MJ
Albedo <0.48 [3]
Temperature 3470 K

    WASP-189 b (also known as HD 133112 b) is an extrasolar planet that has an orbital period around its host star, WASP-189 (HD 133112), of less than three earth days, and is about 322 light-years away in the Libra constellation. [1] [2] [4] It was first discovered in 2018, and was observed in 2020 by CHEOPS.

    Contents

    Discovery and observations

    WASP-189 b was first discovered in 2018. [5] In 2020, astronomers used CHEOPS to observe it. Based on a passage behind its host star (occultation) the planet's brightness could be measured and the temperature was estimated to be 3,200 °C (5,790 °F; 3,470 K). Based on a passage in front of its host star (transit) the radius is 1.6 times the radius of Jupiter. [1] [2] [4] Its atmosphere contains titanium oxide, and also contains metals such as chromium, magnesium, vanadium and manganese. [6]

    See also

    References

    1. 1 2 3 University of Bern (28 September 2020). "First study with CHEOPS data describes one of the most extreme planets in the universe". EurekAlert! . Archived from the original on 30 September 2020. Retrieved 28 September 2020.
    2. 1 2 3 "First results from Cheops: ESA's exoplanet observer reveals extreme alien world". esa.int. Esa. Retrieved 28 September 2020.
    3. ↑ Deline, A.; et al. (2022), "The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve", Astronomy & Astrophysics, 659: A74, arXiv: 2201.04518 , Bibcode:2022A&A...659A..74D, doi:10.1051/0004-6361/202142400, S2CID   245877604
    4. 1 2 Lendl, M.; et al. (17 September 2020). "The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS?" (PDF). Astronomy & Astrophysics . 643: A94. arXiv: 2009.13403 . Bibcode:2020A&A...643A..94L. doi: 10.1051/0004-6361/202038677 . Retrieved 28 September 2020.
    5. ↑ Anderson, D. R.; Temple, L. Y.; Nielsen, L. D.; Burdanov, A.; Hellier, C.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Gillon, M.; Jehin, E.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Pozuelos, F. J.; Queloz, D.; Ségransan, D.; Smalley, B.; Triaud, A. H. M. J.; Turner, O. D.; Udry, S.; West, R. G. (2018). "WASP-189b: An ultra-hot Jupiter transiting the bright a star HR 5599 in a polar orbit". arXiv: 1809.04897 [astro-ph.EP].
    6. ↑ Prinoth, B.; Hoeijmakers, H. J.; Kitzmann, D.; Sandvik, E.; Seidel, J. V.; Lendl, M.; Borsato, N. W.; Thorsbro, B.; Anderson, D. R.; Barrado, D.; Kravchenko, K.; Allart, R.; Bourrier, V.; Cegla, H. M.; Ehrenreich, D.; Fisher, C.; Lovis, C.; Guzmán-Mesa, A.; Grimm, S.; Hooton, M.; Morris, B. M.; Oreshenko, M.; Pino, L.; Heng, K. (2022). "Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189 B". Nature Astronomy. 6 (4): 449–457. arXiv: 2111.12732 . Bibcode:2022NatAs...6..449P. doi:10.1038/s41550-021-01581-z. S2CID   244708931.
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