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VZ Arietis

From Wikipedia, the free encyclopedia
Star in the constellation Aries
VZ Arietis
Observation data
Epoch J2000      Equinox J2000
ConstellationAries[1]
Right ascension02h 48m 45.90326s[2]
Declination+25° 11′ 16.9880″[2]
Apparent magnitude (V)5.82–5.89[3]
Characteristics
Evolutionary stagemain sequence[2][4]
Spectral typeA0 V[5]
B−Vcolor index−0.033±0.005[1]
Variable typeα2 CVn[3]
Astrometry
Radial velocity (Rv)+13.8±2.9[6] km/s
Proper motion (μ)RA: +60.139[2]mas/yr
Dec.: −2.475[2]mas/yr
Parallax (π)6.2922±0.1856 mas[2]
Distance520 ± 20 ly
(159 ± 5 pc)
Absolute magnitude (MV)+0.48[1]
Details
Mass2.74±0.09[4] M
Radius3.1[7] R
Luminosity78.7+15.1
−12.7
[4] L
Surface gravity (log g)4.10[8] cgs
Temperature10,304+72
−71
[4] K
Metallicity[Fe/H]+0.1[8] dex
Rotational velocity (v sin i)54[4] km/s
Other designations
16 Trianguli,VZ Arietis,BD+24°396,FK5 5868,HD 17471,HIP 13121,HR 830,SAO 75588[9]
Database references
SIMBADdata

VZ Arietis is single,[10] white-hued star in the northernzodiacconstellation ofAries. Varying between magnitudes 5.82 and 5.89,[3] the star can be seen with thenaked eye in dark,unpolluted areas. Based upon an annualparallax shift of5.8 mas,[2] it is located 560 light-years from the Sun. It is moving further away with a heliocentricradial velocity of +14 km/s.[6] The star was formerly known as16 Trianguli, but as the star is no longer in the constellationTriangulum, this designation has fallen out of use.[11]

In 1984, the Czechoslovak astronomer Juraj Zverko announced that the star, then called HR 830, is avariable star.[12] It was given itsvariable star designation, VZ Arietis, in 1987.[13]

This is achemically peculiar star[4] of type CP2 (Ap star),[14] showing an anomalous abundance of silicon in itsspectrum.[12] It has astellar classification of A0 V,[5] which indicates this is anA-type main-sequence star that currently fusing hydrogen into helium in its core. This is anAlpha2 Canum Venaticorum variable[14] with 2.7[4] times themass of the Sun and about 3.1[7] times theSun's radius. It is radiating 79 times theSun's luminosity from itsphotosphere at aneffective temperature of 10,304 K.[4]

References

[edit]
  1. ^abcAnderson, 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. XHIP record for this object atVizieR.
  2. ^abcdefgVallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties".Astronomy and Astrophysics.674: A1.arXiv:2208.00211.Bibcode:2023A&A...674A...1G.doi:10.1051/0004-6361/202243940.S2CID 244398875. Gaia DR3 record for this source atVizieR.
  3. ^abcVSX (4 January 2010)."VZ Arietis".AAVSO Website.American Association of Variable Star Observers. Retrieved15 June 2014.
  4. ^abcdefghZorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities".Astronomy & Astrophysics.537: A120.arXiv:1201.2052.Bibcode:2012A&A...537A.120Z.doi:10.1051/0004-6361/201117691.S2CID 55586789.
  5. ^abCowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (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.
  6. ^abde 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.
  7. ^abPasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)".Astronomy & Astrophysics.367 (2) (Third ed.):521–24.arXiv:astro-ph/0012289.Bibcode:2001A&A...367..521P.doi:10.1051/0004-6361:20000451.S2CID 425754.
  8. ^abGebran, M.; Farah, W.; Paletou, F.; Monier, R.; Watson, V. (2016). "A new method for the inversion of atmospheric parameters of A/Am stars".Astronomy & Astrophysics.589: A83.arXiv:1603.01146.Bibcode:2016A&A...589A..83G.doi:10.1051/0004-6361/201528052.S2CID 118549566.
  9. ^"HD 17471".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved22 August 2018.
  10. ^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.
  11. ^Wagman, M. (August 1987). "Flamsteed's Missing Stars".Journal for the History of Astronomy.18 (3): 222.Bibcode:1987JHA....18..209W.doi:10.1177/002182868701800305.S2CID 118445625.
  12. ^abZverko, J. (September 1984). "Classification of Ap-Stars HR 830 and 21 CVn".Bulletin of the Astronomical Institute of Czechoslovakia.35:294–299.Bibcode:1984BAICz..35..294Z.
  13. ^Kholopov, P. N.; Samus, N. N.; Kazarovets, E. V.; Kireeva, N. N. (August 1987)."The 68th Name-List of Variable Stars"(PDF).Information Bulletin on Variable Stars.3058: 1.Bibcode:1987IBVS.3058....1K. Retrieved28 November 2024.
  14. ^abWraight, K. T.; Fossati, L.; Netopil, M.; Paunzen, E.; Rode-Paunzen, M.; Bewsher, D.; Norton, A. J.; White, Glenn J. (February 2012)."A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars".Monthly Notices of the Royal Astronomical Society.420 (1):757–772.arXiv:1110.6283.Bibcode:2012MNRAS.420..757W.doi:10.1111/j.1365-2966.2011.20090.x.S2CID 14811051.
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