14 Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 09m 25.3363s[1] |
| Declination | +25° 56′ 23.612″[1] |
| Apparent magnitude (V) | 4.98[2] |
| Characteristics | |
| Spectral type | F2 III[3] |
| U−B color index | +0.15[2] |
| B−V color index | +0.33[2] |
| Astrometry | |
| Radial velocity (Rv) | –1.21[4] km/s |
| Proper motion (μ) | RA: +70.46[1] mas/yr Dec.: -34.99[1] mas/yr |
| Parallax (π) | 11.30 ± 1.07[1] mas |
| Distance | 290 ± 30 ly (88 ± 8 pc) |
| Absolute magnitude (MV) | 0.26[5] |
| Details | |
| Radius | 4[4] R☉ |
| Luminosity | 32[4] L☉ |
| Surface gravity (log g) | 3.2[4] cgs |
| Temperature | 6,761[4] K |
| Rotational velocity (v sin i) | 139.6[4] km/s |
| Other designations | |
14 Arietis (abbreviated 14 Ari) is a star[7] in the constellation of Aries. 14 Arietis is the Flamsteed designation. It has an apparent visual magnitude of 4.98,[2] which means it is visible to the naked eye. Based upon a measured annual parallax shift of 11.30 mas,[1] is it located at a distance of approximately 290 light-years (89 parsecs), give or take a 30 light-year margin of error.
This is an astrometric binary system.[7] The primary has a stellar classification of F2 III,[3] suggesting that it is a giant star. Despite being an evolved star with four[4] times the radius of the Sun, it is spinning rapidly with a projected rotational velocity of 139.6 km/s.[4] This is causing a pronounced equatorial bulge, with the radius of the star along the equator being 24% greater than the radius at the poles.[8] The star shines at 32[4] times the luminosity of the Sun, with this energy being radiated from its outer atmosphere at an effective temperature of 6,761 K.[4] This heat gives it the yellow-white hued glow of an F-type star.[9]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 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.
- 1 2 3 4 Danziger, I. J.; Dickens, R. J. (July 1967), "Spectrophotometry of New Short-Period Variable Stars", Astrophysical Journal 149: 55, Bibcode:1967ApJ...149...55D, doi:10.1086/149231.
- 1 2 Buscombe, W. (1959), "Standard stars for spectral classification", Mount Stromlo Observatory Mimeogram 3, Bibcode:1959MtSOM...3....1B.
- 1 2 3 4 5 6 7 8 9 10 Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
- ↑ Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
- ↑ "14 Ari -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-18.
- 1 2 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review 20 (1): 51, arXiv:1204.2572, Bibcode:2012A&ARv..20...51V, doi:10.1007/s00159-012-0051-2.
- ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-01-16
External links
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