KELT-20, also known as MASCARA-2, is an A2
main sequence star in the constellation of
Cygnus, about 447
light years away.
Nomenclature
KELT-20 is the star's
KELT designation. It is also designated as MASCARA-2 meaning that it is the second star observed by the
MASCARAexoplanet search program. Its
Henry Draper Catalogue designation is HD 185603, and its
Hipparcos designation is HIP 96618.
Planetary system
In 2017, the discovery of the planet
KELT-20b was announced.[6][7][8]
^
abTalens, G. J. J.; Justesen, A. B.; Albrecht, S.; McCormac, J.; Van Eylen, V.; Otten, G. P. P. L.; Murgas, F.; Palle, E.; Pollacco, D.; Stuik, R.; Spronck, J. F. P.; Lesage, A. -L.; Grundahl, F.; Fredslund Andersen, M.; Antoci, V.; Snellen, I. A. G. (2018). "MASCARA-2 b. A hot Jupiter transiting the mV = 7.6 A-star HD 185603". Astronomy and Astrophysics. 612.
arXiv:1707.01500.
Bibcode:
2018A&A...612A..57T.
doi:
10.1051/0004-6361/201731512.
S2CID119422884.
^Yan, F.; Reiners, A.; Pallé, E.; Shulyak, D.; Stangret, M.; Molaverdikhani, K.; Nortmann, L.; Mollière, P.; Henning, Th.; Casasayas-Barris, N.; Cont, D.; Chen, G.; Czesla, S.; Sánchez-López, A.; López-Puertas, M.; Ribas, I.; Quirrenbach, A.; Caballero, J. A.; Amado, P. J.; Galadí-Enríquez, D.; Khalafinejad, S.; Lara, L. M.; Montes, D.; Morello, G.; Nagel, E.; Sedaghati, E.; Zapatero Osorio, M. R.; Zechmeister, M. (2022), "Detection of iron emission lines and a temperature inversion on the dayside of the ultra-hot Jupiter KELT-20b", Astronomy & Astrophysics, 659: A7,
arXiv:2201.08759,
Bibcode:
2022A&A...659A...7Y,
doi:
10.1051/0004-6361/202142395,
S2CID246210387
^Fu, Guangwei; Sing, David K.; Lothringer, Joshua D.; Deming, Drake; Ih, Jegug; Kempton, Eliza M. -R.; Malik, Matej; Komacek, Thaddeus D.; Mansfield, Megan; Bean, Jacob L. (2022), "Strong H2O and CO Emission Features in the Spectrum of KELT-20b Driven by Stellar UV Irradiation", The Astrophysical Journal Letters, 925 (1): L3,
arXiv:2201.02261,
Bibcode:
2022ApJ...925L...3F,
doi:10.3847/2041-8213/ac4968
^Kasper, David; Bean, Jacob L.; Line, Michael R.; Seifahrt, Andreas; Brady, Madison T.; Lothringer, Joshua; Pino, Lorenzo; Fu, Guangwei; Pelletier, Stefan; Stürmer, Julian; Benneke, Björn; Brogi, Matteo; Désert, Jean-Michel (2023), "Unifying High- and Low-resolution Observations to Constrain the Dayside Atmosphere of KELT-20b/MASCARA-2b", The Astronomical Journal, 165 (1): 7,
arXiv:2208.04759,
Bibcode:
2023AJ....165....7K,
doi:10.3847/1538-3881/ac9f40