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Zeta Crucis

From Wikipedia, the free encyclopedia
Star in the constellation Crux
Zeta Crucis
Observation data
Epoch J2000      Equinox J2000
ConstellationCrux
Right ascension12h 18m 26.24772s[1]
Declination–64° 00′ 11.0528″[1]
Apparent magnitude (V)4.04[2]
Characteristics
Spectral typeB2.5V[3]
U−Bcolor index–0.68[2]
B−Vcolor index–0.17[2]
Astrometry
Radial velocity (Rv)+15.8[4] km/s
Proper motion (μ)RA: −33.80[1]mas/yr
Dec.: −10.15[1]mas/yr
Parallax (π)9.12±0.45 mas[1]
Distance360 ± 20 ly
(110 ± 5 pc)
Absolute magnitude (MV)−1.13[5]
Details
Mass6.4±0.1[6] M☉
Luminosity737[5] L☉
Temperature3,832[7] K
Rotational velocity (v sin i)115[8] km/s
Age20.0±4.3[6] Myr
Other designations
ζ Cru,CPD−63°2235,HD 106983,HIP 60009,HR 4679,SAO 251841[9]
Database references
SIMBADdata

Zeta Crucis,Latinized fromζ Crucis, is abinary star system in the southernconstellation ofCrux. It is visible to the naked eye with anapparent magnitude of 4.06m. ζ Crucis is located at about 360light-years from theSun. It is a member of the Lower Centaurus–Crux subgroup of theScorpius–Centaurus association.[10]

This is a double-linedspectroscopic binary star system.[11] The spectrum matches aB-type main-sequence star with astellar classification of B2.5 V. There is a faint visual companion with an apparent magnitude of 12.49.[12]

References

[edit]
  1. ^abcdeVan 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
  2. ^abcJohnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars".Communications of the Lunar and Planetary Laboratory.4 (99): 99.Bibcode:1966CoLPL...4...99J.
  3. ^Hiltner, W. A.; Garrison, R. F.; Schild, R. E. (July 1969)."MK Spectral Types for Bright Southern OB Stars".Astrophysical Journal.157:313–326.Bibcode:1969ApJ...157..313H.doi:10.1086/150069.
  4. ^Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.).Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto:International Astronomical Union.Bibcode:1967IAUS...30...57E.
  5. ^abAnderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation",Astronomy Letters,38 (5): 331,arXiv:1108.4971,Bibcode:2012AstL...38..331A,doi:10.1134/S1063773712050015,S2CID 119257644.
  6. ^abTetzlaff, 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.
  7. ^Gerbaldi, M.; Faraggiana, R.; Balin, N. (November 2001)."Binary systems with post-T Tauri secondaries".Astronomy and Astrophysics.379:162–184.Bibcode:2001A&A...379..162G.doi:10.1051/0004-6361:20011298.
  8. ^Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities".Contributi Osservatorio Astronomico di Padova in Asiago.239 (1): 1.Bibcode:1970CoAsi.239....1B.
  9. ^"zet Cru".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2009-09-10.
  10. ^Chen, Christine H.; et al. (September 2012), "A Spitzer MIPS Study of 2.5-2.0 M⊙ Stars in Scorpius–Centaurus",The Astrophysical Journal,756 (2): 24,arXiv:1207.3415,Bibcode:2012ApJ...756..133C,doi:10.1088/0004-637X/756/2/133,S2CID 119278056, 133.
  11. ^Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars",Monthly Notices of the Royal Astronomical Society,424 (3): 1925,arXiv:1205.5238,Bibcode:2012MNRAS.424.1925C,doi:10.1111/j.1365-2966.2012.21317.x,S2CID 119120749.
  12. ^Gahm, G. F.; Ahlin, P.; Lindroos, K. P. (January 1983). "A study of visual double stars with early type primaries. I - Spectroscopic results".Astronomy and Astrophysics Supplement Series.51:143–159.Bibcode:1983A&AS...51..143G.
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