Xi Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 24m 49.058s[1] |
| Declination | +10° 36′ 38.01″[1] |
| Apparent magnitude (V) | +5.46[2] |
| Characteristics | |
| Spectral type | B7 IV[3] |
| U−B color index | −0.48[2] |
| B−V color index | −0.10[2] |
| Astrometry | |
| Radial velocity (Rv) | −0.5±2.8[4] km/s |
| Proper motion (μ) | RA: +20.979 mas/yr[1] Dec.: −15.022 mas/yr[1] |
| Parallax (π) | 4.2483±0.1511 mas[1] |
| Distance | 770 ± 30 ly (235 ± 8 pc) |
| Absolute magnitude (MV) | −0.43[5] |
| Details | |
| Mass | 4.85±0.13[6] M☉ |
| Luminosity | 1,000+186 −157[6] L☉ |
| Surface gravity (log g) | 3.897±0.017[7] cgs |
| Temperature | 13,627±100[7] K |
| Rotational velocity (v sin i) | 164±8[7] km/s |
| Age | 195[5] Myr |
| Other designations | |
| ξ Ari, ψ Ceti, 24 Arietis, BD+09°316, FK5 2164, GC 2901, HD 14951, HIP 11249, HR 702, SAO 92932, PPM 118200[8] | |
| Database references | |
| SIMBAD | data |
Xi Arietis is a binary star[9] system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from ξ Arietis, and abbreviated Xi Ari or ξ Ari. This system has an apparent visual magnitude of 5.46,[2] and so is dimly visible to the naked eye. Based upon an annual parallax shift of 3.74±0.29 mas as seen from Earth, it is 770 ± 30 light-years (236.1 ± 9.2 parsecs) distant from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.24 due to interstellar dust.[5] The proximity of this system to the ecliptic means it is subject to lunar occultations.[10]
This is a double-lined spectroscopic binary.[9] The spectrum matches a stellar classification of B7 IV,[3] which suggests a subgiant star that has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. Xi Arietis was once a designation for Psi Ceti (ψ Cet, ψ Ceti), and was later recognized to be a duplicate by Bayer.[11]
References
[edit]- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv:2208.00211, Bibcode:2023A&A...674A...1G, doi:10.1051/0004-6361/202243940, S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Crawford, D. L.; et al. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal, 76: 1058, Bibcode:1971AJ.....76.1058C, doi:10.1086/111220.
- ^ a b Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement, 17: 371, Bibcode:1968ApJS...17..371L, doi:10.1086/190179.
- ^ Gontcharov, G. A. (2006), "Pulkovo compilation of radial velocities for 35495 stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
- ^ a b c Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
- ^ a b Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b c Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv:1008.1761, Bibcode:2010ApJ...722..605H, doi:10.1088/0004-637X/722/1/605, S2CID 118532653.
- ^ "ksi Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-28.
- ^ a b 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.
- ^ Schmidtke, P. C.; Africano, J. L. (September 1984), "KPNO lunar occultation summary. I", Astronomical Journal, 89: 1371–1378, Bibcode:1984AJ.....89.1371S, doi:10.1086/113637.
- ^ Ridpath, Ian, "Bayer's Uranometria and Bayer letters", Star Tales.
