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Omega1 Cygni

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Omega1 Cygni

A light curve for V2014 Cygni, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cygnus
Right ascension 20h 30m 03.54116s[2]
Declination +48° 57′ 05.6446″[2]
Apparent magnitude (V) +4.93 - 4.96[3]
Characteristics
Spectral type B2.5 IV[4]
U−B color index −0.68[5]
B−V color index −0.09[5]
Variable type β Cep[6] (λ Eri[3])
Astrometry
Radial velocity (Rv)−21.9±2.0[7] km/s
Proper motion (μ) RA: +10.883[8] mas/yr
Dec.: +7.057[8] mas/yr
Parallax (π)2.5878 ± 0.1637 mas[8]
Distance1,260 ± 80 ly
(390 ± 20 pc)
Absolute magnitude (MV)−2.65[9]
Details
Mass8.1±0.2[4] M☉
Radius13.825[10] R☉
Luminosity1,549[11] L☉
Surface gravity (log g)2.312[10] cgs
Temperature16,982[11] K
Metallicity [Fe/H]0.0[9] dex
Rotational velocity (v sin i)145[12] km/s
Age33.2±4.5[4] Myr
Other designations
ω1 Cyg, 45 Cygni, BD+48°3142, FK5 3641, HD 195556, HIP 101138, HR 7844, SAO 49712, V2014 Cygni[13]
Database references
SIMBADdata

Omega1 Cygni, Latinized from ω1 Cygni, is the Bayer designation for a solitary[14] star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent visual magnitude of 4.94.[5] Based upon an annual parallax shift of 2.59 mas,[8] it is estimated to lie roughly 1,260 light years from the Sun. Relative to its neighbors, this star has a peculiar velocity of 25.7±2.2 km/s.[7]

This is a somewhat evolved B-type subgiant star with a stellar classification of B2.5 IV.[4] Telting and colleagues report it as a Beta Cephei variable with a high degree of confidence as they found regular pulsations in its spectrum in a high-resolution spectroscopy study published in 2006.[6] Its brightness varies irregularly by 0.034 magnitude every 1.137 days.[15]

See also

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References

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  1. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 27 November 2022.
  2. ^ a b van Leeuwen, F. (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.
  3. ^ a b "V2014 Cygni", International Variable Star Index, retrieved 2020-09-02
  4. ^ a b c d Tetzlaff, N.; et al. (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, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
  5. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
  6. ^ a b Telting, J. H.; et al. (June 2006), "A high-resolution spectroscopy survey of β Cephei pulsations in bright stars", Astronomy and Astrophysics, 452 (3): 945–953, Bibcode:2006A&A...452..945T, doi:10.1051/0004-6361:20054730, hdl:2066/36162.
  7. ^ a b Bobylev, V. V.; Bajkova, A. T. (August 2013), "Galactic kinematics from a sample of young massive stars", Astronomy Letters, 39 (8): 532–549, arXiv:1307.1677, Bibcode:2013AstL...39..532B, doi:10.1134/S106377371308001X, S2CID 118568203.
  8. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  9. ^ a b Gontcharov, G. A. (2012), "Dependence of kinematics on the age of stars in the solar neighborhood", Astronomy Letters, 38 (12): 771–782, arXiv:1606.08814, Bibcode:2012AstL...38..771G, doi:10.1134/S1063773712120031, S2CID 118345778.
  10. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017), "Fundamental parameters and infrared excesses of Tycho–Gaia stars", Monthly Notices of the Royal Astronomical Society, 471 (1): 770–791, arXiv:1706.02208, Bibcode:2017MNRAS.471..770M, doi:10.1093/mnras/stx1433, S2CID 73594365.
  11. ^ a b Simón-Díaz, S.; Godart, M.; Castro, N.; Herrero, A.; Aerts, C.; Puls, J.; Telting, J.; Grassitelli, L. (2017), "The IACOB project . III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars", Astronomy and Astrophysics, 597: A22, arXiv:1608.05508, Bibcode:2017A&A...597A..22S, doi:10.1051/0004-6361/201628541, S2CID 3478126.
  12. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590.
  13. ^ "* ome01 Cyg -- Pulsating variable Star". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-02-22.
  14. ^ 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.
  15. ^ Lefèvre, L.; et al. (2009), "A systematic study of variability among OB-stars based on HIPPARCOS photometry", Astronomy and Astrophysics, 507 (2): 1141, Bibcode:2009A&A...507.1141L, doi:10.1051/0004-6361/200912304.
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