Astronomy:53 Arietis

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Short description: Star in the constellation Aries
53 Arietis
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aries
Right ascension  03h 07m 25.67315s[1]
Declination +17° 52′ 47.9696″[1]
Apparent magnitude (V) 6.10[2]
Characteristics
Spectral type B1.5 V[3]
U−B color index [4] 0.80[2]
B−V color index −0.12[2]
Variable type β Cep[4]
Astrometry
Radial velocity (Rv)+21.2[5] km/s
Proper motion (μ) RA: −23.733[1] mas/yr
Dec.: +8.080[1] mas/yr
Parallax (π)3.1874 ± 0.0630[1] mas
Distance1,020 ± 20 ly
(314 ± 6 pc)
Details
Mass7.5±0.2[6] M☉
Radius4.2[1] R☉
Luminosity1,962[1] L☉
Surface gravity (log g)3.99[1] cgs
Temperature19,065[1] K
Metallicity [Fe/H]−0.18[1] dex
Rotational velocity (v sin i)5[7] km/s
Other designations
UW Arietis, BD+17°493, HD 19374, HIP 14514, HR 938, SAO 93284.[8]
Database references
SIMBADdata

53 Arietis (abbreviated 53 Ari) is a variable star in the northern constellation of Aries. 53 Arietis is the Flamsteed designation; it also bears the variable star designation UW Arietis. It is a B-type main sequence star with a stellar classification of B1.5 V[3] and mean apparent magnitude of 6.10,[2] which is near the lower limit for naked eye visibility. Based upon an annual parallax shift of 3.2 mas, the estimated distance to this star is roughly 1,020 light-years (314 parsecs).

53 Arietis is a Beta Cephei variable.[4] It is a runaway star with a peculiar velocity of 48.1 km/s relative to its neighbors.[6] The star was ejected from the Orion nebula some 4–5 million years ago, possibly when an orbiting companion exploded as a supernova.[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 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.
  2. ↑ 2.0 2.1 2.2 2.3 Crawford, D. L.; Barnes, J. V.; Golson, J. C. (1971), "Four-color, H-beta, and UBV photometry for bright B-type stars in the northern hemisphere", The Astronomical Journal 76: 1058, doi:10.1086/111220, Bibcode: 1971AJ.....76.1058C. 
  3. ↑ 3.0 3.1 Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement 17: 371, doi:10.1086/190179, Bibcode: 1968ApJS...17..371L. 
  4. ↑ 4.0 4.1 4.2 Stankov, Anamarija; Handler, Gerald (June 2005), "Catalog of Galactic β Cephei Stars", The Astrophysical Journal Supplement Series 158 (2): 193–216, doi:10.1086/429408, Bibcode: 2005ApJS..158..193S. 
  5. ↑ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, 30, University of Toronto: International Astronomical Union, pp. 57, Bibcode: 1967IAUS...30...57E. 
  6. ↑ 6.0 6.1 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T. 
  7. ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode: 2002ApJ...573..359A. 
  8. ↑ "53 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=53+Ari. 
  9. ↑ Hoogerwerf, R.; de Bruijne, J. H. J.; de Zeeuw, P. T. (January 2001), "On the origin of the O and B-type stars with high velocities. II. Runaway stars and pulsars ejected from the nearby young stellar groups", Astronomy and Astrophysics 365 (2): 49–77, doi:10.1051/0004-6361:20000014, Bibcode: 2001A&A...365...49H. 

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