Astronomy:Zeta Crucis
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Short description: Star in the constellation Crux
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Crux[1] |
| Right ascension | 12h 18m 26.24075s[2] |
| Declination | −64° 00′ 11.1073″[2] |
| Apparent magnitude (V) | 4.04[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B2.5V[4] |
| U−B color index | −0.68[3] |
| B−V color index | −0.17[3] |
| Astrometry | |
| Radial velocity (Rv) | +15.8[5] km/s |
| Proper motion (μ) | RA: −37.431[2] mas/yr Dec.: −6.576[2] mas/yr |
| Parallax (π) | 9.2402 ± 0.1928[2] mas |
| Distance | 353 ± 7 ly (108 ± 2 pc) |
| Absolute magnitude (MV) | −1.13[1] |
| Details | |
| Mass | 6.4±0.1[6] M☉ |
| Radius | 3.7[2] R☉ |
| Luminosity | 737[1] L☉ |
| Surface gravity (log g) | 3.99[2] cgs |
| Temperature | 18,155[7] K |
| Rotational velocity (v sin i) | 115[8] km/s |
| Age | 19.8[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Zeta Crucis, Latinized from ζ Crucis, is a binary star system in the southern constellation of Crux. It is visible to the naked eye with an apparent magnitude of 4.06m. ζ Crucis is located at about 350 light-years from the Sun. It is a member of the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association.[11]
This is a double-lined spectroscopic binary star system.[12] The spectrum matches a B-type main-sequence star with a stellar classification of B2.5 V. There is a faint visual companion with an apparent magnitude of 12.49.[13]
References
- ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Johnson, 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.
- ↑ Hiltner, W. A.; Garrison, R. F.; Schild, R. E. (July 1969). "MK Spectral Types for Bright Southern OB Stars". Astrophysical Journal 157: 313–326. doi:10.1086/150069. Bibcode: 1969ApJ...157..313H.
- ↑ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". in Batten, Alan Henry. University of Toronto: International Astronomical Union. Bibcode: 1967IAUS...30...57E.
- ↑ 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.
- ↑ Gerbaldi, M.; Faraggiana, R.; Balin, N. (November 2001). "Binary systems with post-T Tauri secondaries". Astronomy and Astrophysics 379: 162–184. doi:10.1051/0004-6361:20011298. Bibcode: 2001A&A...379..162G.
- ↑ 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.
- ↑ Gratton, R.; Squicciarini, V.; Nascimbeni, V.; Janson, M.; Reffert, S.; Meyer, M.; Delorme, P.; Mamajek, E. E. et al. (2023). "Multiples among B stars in the Scorpius-Centaurus association". Astronomy and Astrophysics 678: A93. doi:10.1051/0004-6361/202346806. Bibcode: 2023A&A...678A..93G.
- ↑ "zet Cru". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=zet+Cru.
- ↑ 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, doi:10.1088/0004-637X/756/2/133, 133, Bibcode: 2012ApJ...756..133C.
- ↑ 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, doi:10.1111/j.1365-2966.2012.21317.x, Bibcode: 2012MNRAS.424.1925C.
- ↑ 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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