Astronomy:Nu Arietis

From HandWiki
Short description: Star in the constellation Aries
ν Arietis
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aries[1]
Right ascension  02h 38m 48.992s[2]
Declination +21° 57′ 41.05″[2]
Apparent magnitude (V) 5.43[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type A7 V[5]
U−B color index +0.13[3]
B−V color index +0.168±0.004[1]
Astrometry
Radial velocity (Rv)+8.0±4.2[6] km/s
Proper motion (μ) RA: −4.203[2] mas/yr
Dec.: −15.103[2] mas/yr
Parallax (π)12.0933 ± 0.3264[2] mas
Distance270 ± 7 ly
(83 ± 2 pc)
Absolute magnitude (MV)+0.40[1]
Details
ν Ari A
Mass1.89±0.29[7] M☉
Radius3.28±0.13[7] R☉
Luminosity37.6±2.3[7] L☉
Surface gravity (log g)3.68±0.08[7] cgs
Temperature7,889±123[7] K
Rotational velocity (v sin i)133[8] km/s
Age621+269
−268[9] Myr
ν Ari B
Mass1.0±0.03[9] M☉
Temperature5,551±107[9] K
Metallicity [Fe/H]0.0[9] dex
Rotational velocity (v sin i)10[9] km/s
Other designations
ν Ari, 32 Arietis, BD+21°362, FK5 89, GC 3167, HD 16432, HIP 12332, HR 773, SAO 75495, PPM 91860[10]
Database references
SIMBADdata

Nu Arietis is a white-hued star in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from ν Arietis, and abbreviated Nu Ari or ν Ari. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.43.[3] Based upon an annual parallax shift of 9.68 mas as seen from Earth,[2] it is located approximately 270 light years from the Sun. It is moving further away with a radial velocity of 8 km/s.[6]

This is an A-type main sequence star with a stellar classification of A7 V.[5] Nu Arietis has an estimated 1.9 times the mass of the Sun and about 3.3 times the Sun's radius. The star is radiating 37.6 times the Sun's luminosity from its photosphere at an effective temperature of around 7,889 K.[7] It is roughly 621[9] million years old and is spinning with a projected rotational velocity of 133 km/s.[8]

A close companion was discovered in 2016 using the direct spectral detection method. This object has the same mass as the Sun and an effective temperature of 5,551 K.[9]

References

  1. ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 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.
  3. ↑ 3.0 3.1 3.2 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. 
  4. ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z. 
  5. ↑ 5.0 5.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C. 
  6. ↑ 6.0 6.1 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Stassun, Keivan G. et al. (October 2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal 158 (4): 138, doi:10.3847/1538-3881/ab3467, ISSN 0004-6256, Bibcode: 2019AJ....158..138S. 
  8. ↑ 8.0 8.1 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. 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Gullikson, Kevin et al. (August 2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal 152 (2): 13, doi:10.3847/0004-6256/152/2/40, 40, Bibcode: 2016AJ....152...40G. 
  10. ↑ "nu. Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=nu.+Ari. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:Nu_Arietis&oldid=4213942"