WASP-26 is an old star close to leaving themain sequence and is part of a widebinary. The binary's projected separation is 3800astronomical units, its companion star being aK-type star with an effective temperature of 4600K and a visual magnitude of 13.6.[5] WASP-26 produces a large amount of ultraviolet light due to frequent flares, with an average ultraviolet flux close to the F7 class main-sequence starWASP-1.[9]
Thehot Jupiter class planet WASP-26b was discovered around WASP-26 in 2010.[5] The planet would have an equilibrium temperature of 1660±40 K, but measured temperatures are slightly higher at 1775K and no noticeable difference exists between the day-side and the night-side of the planet.[10] A 2011 study using theRossiter-McLaughlin effect failed to determine the inclination of the planetary orbit to the equatorial plane of the parent star due to high stellar noise,[7] but an initial constraint of -34+36 −26° was published in 2012.[11]
^Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".Astronomy and Astrophysics.355:L27 –L30.Bibcode:2000A&A...355L..27H.
^Irwin, Stacy Ann (2015).Analysis of Angular Momentum in Planetary Systems and Host Stars (Thesis).Bibcode:2015PhDT.........5I.
^abcSmalley, B.; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Triaud, A. H. M. J.; West, R. G.; Bentley, S. J.; Enoch, B.; Pepe, F.; Pollacco, D. L.; Segransan, D.; Smith, A. M. S.; Southworth, J.; Udry, S.; Wheatley, P. J.; Wood, P. L.; Bento, J. (2010). "WASP-26b: A 1-Jupiter-mass planet around an early-G-type star".Astronomy and Astrophysics.520: A56.arXiv:1004.1542.Bibcode:2010A&A...520A..56S.doi:10.1051/0004-6361/201014705.S2CID55114421.
^abAnderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; Vanhuysse, M. (2011). "Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26".Astronomy & Astrophysics.534: A16.arXiv:1106.6092.Bibcode:2011A&A...534A..16A.doi:10.1051/0004-6361/201117597.S2CID31204371.
^Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments",The Astrophysical Journal,757 (1): 18,arXiv:1206.6105,Bibcode:2012ApJ...757...18A,doi:10.1088/0004-637X/757/1/18,S2CID17174530
