Nu Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 38m 48.99425s[1] |
| Declination | +21° 57′ 41.0616″[1] |
| Apparent magnitude (V) | 5.43[2] |
| Characteristics | |
| Spectral type | A7 V[3] |
| U−B color index | +0.13[2] |
| B−V color index | +0.16[2] |
| Astrometry | |
| Radial velocity (Rv) | +8.0±4.2[4] km/s |
| Proper motion (μ) | RA: −7.47[1] mas/yr Dec.: −15.90[1] mas/yr |
| Parallax (π) | 9.68 ± 0.76 mas[1] |
| Distance | 340 ± 30 ly (103 ± 8 pc) |
| Absolute magnitude (MV) | +0.40[5] |
| Details | |
| ν Ari A | |
| Mass | 2.43±0.06[6] M☉ |
| Radius | 1.8[7] R☉ |
| Luminosity | 63.5[6] L☉ |
| Surface gravity (log g) | 3.5±0.25[8] cgs |
| Temperature | 8,000±500[8] K |
| Rotational velocity (v sin i) | 133[6] km/s |
| Age | 621+269 −268[8] Myr |
| ν Ari B | |
| Mass | 1.0±0.03[8] M☉ |
| Temperature | 5,551±107[8] K |
| Metallicity [Fe/H] | 0.0[8] dex |
| Rotational velocity (v sin i) | 10[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Arietis, Latinized from ν Arietis, is the Bayer designation for a white-hued star in the northern constellation of Aries. It is faintly visible to the naked eye with an apparent visual magnitude of +5.43.[2] Based upon an annual parallax shift of 9.68 mas as seen from Earth,[1] it is located roughly 340 light years from the Sun. It is moving away from the Sun with a radial velocity of 8 km/s.[4]
This is an A-type main sequence star with a stellar classification of A7 V.[3] Nu Arietis has an estimated 2.4[6] times the mass of the Sun and about 1.8[7] times the Sun's radius. The star is radiating 63.5[6] times the Sun's luminosity from its photosphere at an effective temperature of around 8,000 K.[8] It is roughly 621[8] million years old and is spinning with a projected rotational velocity of 133 km/s.[6] A close companion was discovered in 2016 using the direct spectral detection method.[8]
References
[edit]- ^ a b c d e f van 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.
- ^ a b c d Oja, T. (April 1983), "UVB photometry of FK4 and FK4 Supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode:1983A&AS...52..131O.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Anderson, 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.
- ^ a b c d e f 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.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 5211–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b c d e f g h i j Gullikson, Kevin; et al. (August 2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 13, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065, 40.
- ^ "nu. Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-28.
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