Short description: Star in the constellation Aries
Xi Arietis
Observation data
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[1] mas/yr
Dec.: −15.022[1] mas/yr |
| Parallax (π) | 4.2483 ± 0.1511[1] mas |
| 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
- ↑ 1.0 1.1 1.2 1.3 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.
- ↑ 2.0 2.1 2.2 2.3 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, doi:10.1086/111220, Bibcode: 1971AJ.....76.1058C.
- ↑ 3.0 3.1 Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement 17: 371, doi:10.1086/190179, Bibcode: 1968ApJS...17..371L.
- ↑ Gontcharov, G. A. (2006), "Pulkovo compilation of radial velocities for 35495 stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 5.0 5.1 5.2 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ 6.0 6.1 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 7.0 7.1 7.2 Huang, Wenjin et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal 722 (1): 605–619, doi:10.1088/0004-637X/722/1/605, Bibcode: 2010ApJ...722..605H.
- ↑ "ksi Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ksi+Ari.
- ↑ 9.0 9.1 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.
- ↑ Schmidtke, P. C.; Africano, J. L. (September 1984), "KPNO lunar occultation summary. I", Astronomical Journal 89: 1371–1378, doi:10.1086/113637, Bibcode: 1984AJ.....89.1371S.
- ↑ Ridpath, Ian, "Bayer's Uranometria and Bayer letters", Star Tales, http://www.ianridpath.com/startales/bayer.htm.
External links
 | Original source: https://en.wikipedia.org/wiki/Xi Arietis. Read more |
