Star in the constellation Indus
Theta Indi (θ Ind) is a binary star in the constellation Indus . Its apparent magnitude is 4.40[ 2] and it is approximately 98.8 light years away based on parallax.[ 1] The smaller companion, B, has a spectral type of G0V (yellow main-sequence) and an apparent magnitude of 7.18 at a separation of 6.71″.[ 9] Recent observations suggest the primary is itself a binary with components Aa and Ab orbiting at 0.0617″, estimated period about 1.3 years.[ 10] [ 11]
^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction" . Astronomy and Astrophysics . 474 (2): 653–664. arXiv :0708.1752 . Bibcode :2007A&A...474..653V . doi :10.1051/0004-6361:20078357 . S2CID 18759600 . Vizier catalog entry
^ a b c d "Theta Indi" . SIMBAD Astronomical Database . Retrieved 2016-08-23 .
^ Gray, R. O.; Garrison, R. F. (July 1989), "The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation", Astrophysical Journal Supplement Series , 70 (4): 623–636, Bibcode :1989ApJS...70..623G , doi :10.1086/191349
^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication , Carnegie Institution of Washington , Bibcode :1953GCRV..C......0W , LCCN 54001336
^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331–346. arXiv :1108.4971 . Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . S2CID 119257644 . Vizier catalog entry
^ a b David, Trevor J.; Hillenbrand, Lynne A. (May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal . 804 (2): 146–184. arXiv :1501.03154 . Bibcode :2015ApJ...804..146D . doi :10.1088/0004-637X/804/2/146 . S2CID 33401607 . Vizier catalog entry
^ a b c Plavchan, Peter; et al. (June 2009), "New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope", The Astrophysical Journal , 698 (2): 1068–1094, arXiv :0904.0819 , Bibcode :2009ApJ...698.1068P , doi :10.1088/0004-637X/698/2/1068 , S2CID 51417657 .
^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars" . Monthly Notices of the Royal Astronomical Society . 427 (1): 343–357. arXiv :1208.2037 . Bibcode :2012MNRAS.427..343M . doi :10.1111/j.1365-2966.2012.21873.x . S2CID 118665352 . Vizier catalog entry
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv :0806.2878 , Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x , S2CID 14878976 Vizier catalog entry
^ Mason, Brian D.; et al. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal , 122 (6): 3466–3471, Bibcode :2001AJ....122.3466M , doi :10.1086/323920 Vizier catalog entry
^ Marion, L.; Absil, O.; Ertel, S.; Le Bouquin, J.-B.; Defrère, D. (July 2014), Rajagopal, Jayadev K; Creech-Eakman, Michelle J; Malbet, Fabien (eds.), "Unveiling new stellar companions from the PIONIER exozodi survey", Proceedings of the SPIE , Optical and Infrared Interferometry IV, 9146 : 91461K, arXiv :1410.5714 , Bibcode :2014SPIE.9146E..1KM , doi :10.1117/12.2057823 , S2CID 54045048