Astronomy:HD 23753

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Short description: Star in the constellation Taurus
HD 23753
Image of the Pleiades star cluster
Red circle.svg
HD 23753 in a long exposure of the Pleiades open cluster circled in red
Observation data
Equinox J2000.0]] (ICRS)
Constellation Taurus
Right ascension  03h 48m 20.81702s[1]
Declination +23° 25′ 16.5006″[1]
Apparent magnitude (V) 5.44[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 Vn[4]
B−V color index −0.067±0.008[2]
Astrometry
Radial velocity (Rv)+7.6±0.5[5] km/s
Proper motion (μ) RA: +19.481[1] mas/yr
Dec.: −47.434[1] mas/yr
Parallax (π)7.7224 ± 0.1918[1] mas
Distance420 ± 10 ly
(129 ± 3 pc)
Absolute magnitude (MV)0.00[2]
Details
Mass3.21±0.07[3] M☉
Radius3.2[6] R☉
Luminosity150.0+16.2
−14.8[3] L☉
Temperature11,535+80
−79[3] K
Rotation0.6994 d[7]
Rotational velocity (v sin i)335[3] km/s
Age125[8] Myr
Other designations
NSV 1321, BD+22° 563, HD 23753, HIP 17776, HR 1172, SAO 76215[9]
Database references
SIMBADdata

HD 23753 is a single[10] star in the equatorial zodiac constellation of Taurus, and is a member of the Pleiades open cluster.[11] It is dimly visible to the naked eye with an apparent visual magnitude of 5.44.[2] The distance to this star, as determined from its annual parallax shift of 7.7 mas,[1] is about 420 light years. It is moving further from the Earth with a heliocentric radial velocity of +8 km/s.[5] The star is positioned near the ecliptic and so is subject to lunar occultations.[12]

This is a B-type main-sequence star with a stellar classification of B9 Vn,[4] where the 'n' indicates "nebulous" lines due to rapid rotation. It is 125[8] million years old with a projected rotational velocity of 335 km/s,[3] completing a full revolution about its axis every 16.79 hours.[7] HD 23753 has been catalogued as a suspected variable star with the designation NSV 1321,[13] although the amplitude is no more than 0.1 magnitude and it may even be suitable for a photometric standard.[14] Wraight et al. report that STEREO detected very shallow eclipses, with a period of 2.2663 days, during which the brightness falls by 1%.[15]

HD 23753 has 3.21[3] times the mass of the Sun and 3.2[6] times the Sun's radius. It is radiating 150[3] times the Sun's luminosity from its photosphere at an effective temperature of 11,535 K.[3]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. 
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Cowley, A. (November 1972), "Spectral classification of the bright B8 stars", Astronomical Journal 77: 750–755, doi:10.1086/111348, Bibcode: 1972AJ.....77..750C. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 Pasinetti Fracassini, L. E. et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics 367 (2): 521–24, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  7. ↑ 7.0 7.1 Rebull, L. M. et al. (November 2016), "Rotation in the Pleiades with K2. I. Data and First Results", The Astronomical Journal 152 (5): 19, doi:10.3847/0004-6256/152/5/113, 113, Bibcode: 2016AJ....152..113R. 
  8. ↑ 8.0 8.1 Su, K. Y. L. et al. (December 2006), "Debris Disk Evolution around A Stars", The Astrophysical Journal 653 (1): 675–689, doi:10.1086/508649, Bibcode: 2006ApJ...653..675S. 
  9. ↑ "HD 161840". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+161840. 
  10. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  11. ↑ White, Richard E. et al. (February 2001), "Interstellar Matter Near the Pleiades. V. Observations of NA I toward 36 Stars", The Astrophysical Journal Supplement Series 132 (2): 253–280, doi:10.1086/318950, Bibcode: 2001ApJS..132..253W 
  12. ↑ Eitter, J. J.; Beavers, W. I. (August 1977), "Lunar occultation summary. II", Astrophysical Journal Supplement Series 34: 493–504, doi:10.1086/190460, Bibcode: 1977ApJS...34..493E 
  13. ↑ Samus', N. N. et al. (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S. 
  14. ↑ Adelman, S. J. et al. (October 2000), "On the Variability of Late B III-V Stars", Information Bulletin on Variable Stars 4968: 1, Bibcode: 2000IBVS.4968....1A. 
  15. ↑ Wraight, K. T.; White, Glenn J.; Bewsher, D.; Norton, A. J. (October 2011). "STEREO observations of stars and the search for exoplanets". Monthly Notices of the Royal Astronomical Society 416 (4): 2477–2493. doi:10.1111/j.1365-2966.2011.18599.x. Bibcode: 2011MNRAS.416.2477W. 



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