HD 37756

From Wikipedia, the free encyclopedia
HD 37756
Orion constellation map.svg
Red circle.svg
Location of HD 37756 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 40m 50.71498s[1]
Declination −01° 07′ 43.6366″[1]
Apparent magnitude (V) 4.95[2]
Characteristics
Spectral type B2IV-V[3] or B3V[4]
U−B color index −0.83[5]
B−V color index −0.21[5]
Astrometry
Radial velocity (Rv)+26.10[6] km/s
Proper motion (μ) RA: −1.50[1] mas/yr
Dec.: −0.84[1] mas/yr
Parallax (π)3.63 ± 0.37[1] mas
Distanceapprox. 900 ly
(approx. 280 pc)
Absolute magnitude (MV)−2.74[2]
Orbit[7]
Period (P)27.154925 d
Eccentricity (e)0.739±0.007
Periastron epoch (T)2447886.076±0.065 HJD
Argument of periastron (ω)
(secondary)		81.4±2.4°
Semi-amplitude (K1)
(primary)		84.7±1.1 km/s
Details
A
Mass8.6±0.2[8] M☉
Luminosity4830[9] L☉
Temperature21,150[9] K
Metallicity [Fe/H]+0.01[10] dex
Rotational velocity (v sin i)75[11] km/s
Age18.0±3.2[8] Myr
Other designations
NSV 2556, BD−01°1004, GC 7091, HD 37756, HIP 26736, HR 1952, SAO 132445[12]
Database references
SIMBADdata

HD 37756 is a binary star system in the equatorial constellation of Orion, positioned less than a degree to the north of the bright star Alnitak.[13] It has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.95.[2] The system is located at a distance of approximately 900 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +26 km/s.[6] It is a member of the OB1b subgroup of the Orion OB1 Association.[14]

The binary nature of this system was identified by E. B. Frost in 1904.[15] It is a double-lined spectroscopic binary with an orbital period of 27.15 days and a high eccentricity of 0.74.[7] The spectrum matches a massive B-type main-sequence star with a stellar classification of B3V.[4] The secondary is luminous enough to interfere with measurements of the primary spectrum.[15] It is a suspected Cepheid variable with a period of 0.37968 days and an amplitude of 0.03 magnitude in the B band of the UBV photometric system.[16] The system is a candidate eclipsing binary with a minimum dip of 0.04 in visual magnitude during each orbit.[17]

References[]

  1. ^ a b c d e f 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. Vizier catalog entry
  2. ^ a b c Anderson, 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. S2CID 119257644. Vizier catalog entry
  3. ^ Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H (5th Revised ed.). 5050. Bibcode:1995yCat.5050....0H.
  4. ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
  5. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  6. ^ a b Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
  7. ^ a b Hilditch, R. W.; et al. (February 1991). "The eccentric-orbit binaries Iota Orionis and HD 1952: a cautionary tale". The Observatory. 111: 14–20. Bibcode:1991Obs...111...14H.
  8. ^ a b 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. Vizier catalog entry
  9. ^ a b Hohle, M. M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. S2CID 111387483. Vizier catalog entry
  10. ^ 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. Vizier catalog entry
  11. ^ Abt, Helmut A.; et al. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  12. ^ "HD 37756". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-11-20.
  13. ^ Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. 1. Sky Publishing Corporation and the European Space Agency. p. 253. ISBN 0-933346-84-0.
  14. ^ Voss, R.; et al. (September 2010). "Probing the evolving massive star population in Orion with kinematic and radioactive tracers". Astronomy and Astrophysics. 520: 10. arXiv:1005.3827. Bibcode:2010A&A...520A..51V. doi:10.1051/0004-6361/201014408. S2CID 38599952. A51.
  15. ^ a b Rao, N. Kameswara; et al. (1990). "The eccentric double-lined binary BD — 1° 1004". Journal of Astrophysics and Astronomy. 11 (4): 445. Bibcode:1990JApA...11..445K. doi:10.1007/BF02709760. S2CID 73616576.
  16. ^ Hill, Graham (August 1967). "On Beta Cephei Stars: a Search for Beta Cephei Stars". Astrophysical Journal Supplement. 14: 263. Bibcode:1967ApJS...14..263H. doi:10.1086/190156.
  17. ^ Hoffleit, Dorrit (1996). "A Catalogue of Correlations Between Eclipsing Binaries and Other Categories of Double Stars". The Journal of the American Association of Variable Star Observers. 24 (2): 105–116. Bibcode:1996JAVSO..24..105H.
Retrieved from ""