14 Arietis

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.

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 mas[1]
Distance290 ± 30 ly
(88 ± 8 pc)
Absolute magnitude (MV)0.26[5]
Details
Radius4[4] R☉
Luminosity32[4] L☉
Surface gravity (log g)3.2[4] cgs
Temperature6,761[4] K
Rotational velocity (v sin i)139.6[4] km/s
Other designations
BD+25°355, FK5 1089,HD 13174, HIP 10053, HR 623, SAO 75171.[6]
Database references
SIMBADdata

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. 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, S2CID 18759600.
  2. 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.
  3. Buscombe, W. (1959), "Standard stars for spectral classification", Mount Stromlo Observatory Mimeogram, 3: 1, Bibcode:1959MtSOM...3....1B.
  4. 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.
  5. 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, S2CID 118577511.
  6. "14 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-18.{{cite web}}: CS1 maint: postscript (link)
  7. 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, S2CID 14878976.
  8. 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, S2CID 119273474.
  9. "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on February 22, 2012, retrieved 2012-01-16
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