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Delta Columbae is a binary star system in the constellation Columba. It can be seen with the naked eye having an apparent visual magnitude of 3.85.[3] The distance to this system, based upon an annual parallax shift of 13.94 mas,[2] is around 234 lightyears.

Delta Columbae was a latter designation of 3 Canis Majoris, as the early astronomers Johann Bayer and John Flamsteed did not include the constellation Columba in their star charts.[11]

This is a single-lined spectroscopic binary system with an orbital period of 868.78 days and an eccentricity of 0.7.[6] It has a peculiar velocity of 30.2±3.9 km/s, making it a candidate runaway star system. The primary component is a G-type bright giant star with a stellar classification of G7 II.[4] It radiates around 149[8] time the solar luminosity from its outer atmosphere at an effective temperature of 5,136 K.[5]

References

  1. ^ Roman, Nancy G. (1987), “Identification of a constellation from a position”, Publications of the Astronomical Society of the Pacific, 99 (617): 695, Bibcode:1987PASP…99..695R, doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ 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.
  3. ^ a b c d Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1999), “UBVRIJKL photometry of the bright stars”, Commission Lunar and Planetary Laboratory, 4: 99, Bibcode:1966CoLPL…4…99J.
  4. ^ a b Tetzlaff, N.; et al. (January 2011), “A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun”, Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
  5. ^ a b c d Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), “New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?”, Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A…542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
  6. ^ a b Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; et al. (2004), “SB9: The ninth catalogue of spectroscopic binary orbits”, Astronomy & Astrophysics, 424 (2): 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A…424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
  7. ^ Jancart, S.; et al. (October 2005), “Astrometric orbits of SB9 stars”, Astronomy and Astrophysics, 442 (1): 365–380, arXiv:astro-ph/0507695, Bibcode:2005A&A…442..365J, doi:10.1051/0004-6361:20053003, S2CID 15123997.
  8. ^ a b McDonald, I.; et al. (2012). “Fundamental Parameters and Infrared Excesses of Hipparcos Stars”. Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
  9. ^ a b Luck, R. Earle (2014), “Parameters and Abundances in Luminous Stars”, The Astronomical Journal, 147 (6): 137, Bibcode:2014AJ….147..137L, doi:10.1088/0004-6256/147/6/137.
  10. ^ “del Col — Spectroscopic binary”, SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-21.
  11. ^ Wagman, M. (August 1987), “Flamsteed’s Missing Stars”, Journal for the History of Astronomy, 18 (3): 209–223, Bibcode:1987JHA….18..209W, doi:10.1177/002182868701800305, S2CID 118445625.