The "Hot Jupiter" class planet Qatar-1b was discovered by theQatar Exoplanet Survey in 2010.[1] The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on theRossiter-McLaughlin effect equal to −8.4±7.1 degrees.[2] The planet has a large measured temperature difference between dayside (1696±39K) and nightside (1098±158K).[5] A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.[6]
Additional planets or abrown dwarf in the system were suspected in 2013,[7] but were refuted in 2015.[8][9]
Thetransit-timing variation search in 2020 has also resulted in no detection of additional planets in the system,[10][11] although by 2022 additionaltransit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.[12]
^May, Erin; Stevenson, Kevin; Bean, Jacob; Bell, Taylor; Cowan, Nicolas; Dang, Lisa; Desert, Jean-Michel; Fortney, Jonathan; Keating, Dylan; Kempton, Eliza; Komacek, Thaddeus; Lewis, Nikole; Mansfield, Megan; Morley, Caroline; Parmentier, Vivien; Rauscher, Emily; Swain, Mark; Zellem, Robert; Showman, Adam (2022), "A New Analysis of Eight Spitzer Phase Curves and Hot Jupiter Population Trends: Qatar-1b, Qatar-2b, WASP-52b, WASP-34b, and WASP-140b",The Astronomical Journal,163 (6): 256,arXiv:2203.15059,Bibcode:2022AJ....163..256M,doi:10.3847/1538-3881/ac6261,S2CID247778438
^von Essen, C.; Cellone, S.; Mallonn, M.; Albrecht, S.; Miculán, R.; Müller, H. M. (2017). "Testing connections between exo-atmospheres and their host stars".Astronomy & Astrophysics.603: A20.arXiv:1703.10647.doi:10.1051/0004-6361/201730506.S2CID119452420.
^MacIejewski, G.; Fernández, M.; Aceituno, F. J.; Ohlert, J.; Puchalski, D.; Dimitrov, D.; Seeliger, M.; Kitze, M.; Raetz, St.; Errmann, R.; Gilbert, H.; Pannicke, A.; Schmidt, J.-G.; Neuhäuser, R. (2015). "No variations in transit times for Qatar-1 B".Astronomy & Astrophysics.577: A109.arXiv:1503.07191.Bibcode:2015A&A...577A.109M.doi:10.1051/0004-6361/201526031.S2CID118638934.
^abThakur, Parijat; Mannaday, Vineet Kumar; Sahu, Devendra Kumar; Chand, Swadesh; Jiang, Ing-Guey (2020), "Investigating Extra-solar Planetary System Qatar-1 through Transit Observations",Bulletin de la Société Royale des Sciences de Liège:132–136,arXiv:2007.03753,doi:10.25518/0037-9565.7577,S2CID54660279
^abSu, Li-Hsin; Jiang, Ing-Guey; Sariya, Devesh P.; Lee, Chiao-Yu; Yeh, Li-Chin; Mannaday, Vineet Kumar; Thakur, Parijat; Sahu, D. K.; Chand, Swadesh; Shlyapnikov, A. A.; Moskvin, V. V.; Ignatov, Vladimir; Mkrtichian, David; Griv, Evgeny (2021), "Are There Transit Timing Variations for the Exoplanet Qatar-1b?",The Astronomical Journal,161 (3): 108,arXiv:2012.08184,Bibcode:2021AJ....161..108S,doi:10.3847/1538-3881/abd4d8,S2CID229181287
^Mannaday, Vineet Kumar; Thakur, Parijat; Southworth, John; Jiang, Ing-Guey; Sahu, D. K.; Mancini, L.; Vaňko, M.; Kundra, Emil; Gajdoš, Pavol; a-Thano, Napaporn; Sariya, Devesh P.; Yeh, Li-Chin; Griv, Evgeny; Mkrtichian, David; Shlyapnikov, Aleksey (2022), "Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data",The Astronomical Journal,164 (5): 198,arXiv:2209.04080,Bibcode:2022AJ....164..198M,doi:10.3847/1538-3881/ac91c2,S2CID252185524
