Astronomy:Lambda Columbae
From HandWiki
Short description: Variable star in the constellation Columba
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | 05h 53m 06.88101s[2] |
| Declination | −33° 48′ 04.9079″[2] |
| Apparent magnitude (V) | 4.86[3] |
| Characteristics | |
| Spectral type | B5 V[4] |
| U−B color index | −0.57[3] |
| B−V color index | −0.15[3] |
| Variable type | Suspected rotating ellipsoidal[5] |
| Astrometry | |
| Radial velocity (Rv) | +30.0[6] km/s |
| Proper motion (μ) | RA: −4.72[2] mas/yr Dec.: +31.32[2] mas/yr |
| Parallax (π) | 9.75 ± 0.21[2] mas |
| Distance | 335 ± 7 ly (103 ± 2 pc) |
| Absolute magnitude (MV) | −0.17[7] |
| Details | |
| Mass | 4.0±0.1[4] M☉ |
| Radius | 3.4[8] R☉ |
| Luminosity | 213[9] L☉ |
| Surface gravity (log g) | 4.22[10] cgs |
| Temperature | 13,524[9] K |
| Metallicity [Fe/H] | −0.06[10] dex |
| Rotational velocity (v sin i) | 88[11] km/s |
| Age | 56.6±26.1[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Lambda Columbae, Latinized from λ Columbae, is a probable binary star[13] in the southern constellation of Columba. With an apparent visual magnitude of 4.86,[3] it is faintly visible to the naked eye. The measured annual parallax shift of 9.75 mas[2] yields an estimated distance of roughly 335 light years.
Lambda Columbae has a stellar classification of B5 V,[4] indicating that it is a B-type main sequence star. It is a suspected rotating ellipsoidal variable[14] with a period of 0.64 days and an amplitude of 0.07 magnitude.[15] Confirmation would indicate that this is a close binary system.[5] It has an estimated age of around 57 million years.[4]
In Chinese, 子 (Zǐ), meaning Son, refers to an asterism consisting of λ Columbae and β Columbae.[16] Consequently, λ Columbae itself is known as 子一 (Zǐ yī, English: the First Star of Son.).[17] From this Chinese name, the name Tsze is derived.[18]
References
- ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 3.2 3.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", SIMBAD, Bibcode: 1986EgUBV........0M.
- ↑ 4.0 4.1 4.2 4.3 4.4 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ 5.0 5.1 Samus, N.N.Expression error: Unrecognized word "et". (March 2012), General Catalog of Variable Stars, Institute of Astronomy of Russian Academy of Sciences and Sternberg State Astronomical Institute of the Moscow State University.
- ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Carnegie Institute of Washington, D.C.), Bibcode: 1953GCRV..C......0W.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics 367: 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 9.0 9.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ 10.0 10.1 Hempel, M.; Holweger, H. (September 2003), "Abundance analysis of late B stars. Evidence for diffusion and against weak stellar winds", Astronomy and Astrophysics 408: 1065–1076, doi:10.1051/0004-6361:20030889, Bibcode: 2003A&A...408.1065H.
- ↑ Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory (University of Kyoto), Bibcode: 1970crvs.book.....U.
- ↑ "lam Col". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=lam+Col.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Morris, S. L. (August 1985), "The ellipsoidal variable stars", Astrophysical Journal, Part 1 295: 143–152, doi:10.1086/163359, Bibcode: 1985ApJ...295..143M.
- ↑ Hoffleit, Dorrit (1996), "A Catalogue of Correlations Between Eclipsing Binaries and Other Categories of Double Stars", The Journal of the American Association of Variable Star Observers 24 (2): 105–116, Bibcode: 1996JAVSO..24..105H.
- ↑ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN:978-986-7332-25-7.
- ↑ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 16 日
- ↑ Allen, Richard Hinckley (1963), "Columba Noae, Noah's Dove", Star Names: their Lore and Meaning (Dover ed.), https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Columba_Noae*.html.
 |  |
