Delta Columbae
In today's article we will explore the fascinating world of Delta Columbae, a topic that has captured the attention of people of all ages and backgrounds. From its impact on current society to its historical relevance, Delta Columbae has generated endless debates and discussions that have led to a deep analysis of its different facets. Throughout this article, we will take a look at the multiple dimensions of Delta Columbae, its implications in various areas and its influence on the course of history. Join us on this journey of discovery and reflection about Delta Columbae.
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba[1] |
| Right ascension | 06h 22m 06.82831s[2] |
| Declination | −33° 26′ 11.0323″[2] |
| Apparent magnitude (V) | 3.85[3] |
| Characteristics | |
| Spectral type | G7 II[4] |
| U−B color index | +0.52[3] |
| B−V color index | +0.88[3] |
| Astrometry | |
| Proper motion (μ) | RA: −24.23[2] mas/yr Dec.: −51.40[2] mas/yr |
| Parallax (π) | 13.94±0.51 mas[2] |
| Distance | 234 ± 9 ly (72 ± 3 pc) |
| Absolute magnitude (MV) | −0.32[5] |
| Orbit[6][7] | |
| Period (P) | 868.78 d |
| Semi-major axis (a) | 9.02±0.52 mas |
| Eccentricity (e) | 0.7 |
| Inclination (i) | 116.3±4.2° |
| Periastron epoch (T) | 2419915.02 JD |
| Argument of periastron (ω) (secondary) | 117.1° |
| Semi-amplitude (K1) (primary) | 10.6 km/s |
| Details | |
| δ Col A | |
| Luminosity | 149.5[8] L☉ |
| Surface gravity (log g) | 2.49[9] cgs |
| Temperature | 5,136[5] K |
| Metallicity | −0.04[9] dex |
| Rotational velocity (v sin i) | 4.8±0.2[5] km/s |
| Other designations | |
| δ Col, CD−33°2927, HD 44762, HIP 30277, HR 2296, SAO 196735.[10] | |
| Database references | |
| SIMBAD | data |
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
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "del Col -- Spectroscopic binary", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-21.
- ^ 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.
