HD 37646

Last updated
HD 37646
Observation data
Epoch J2000       Equinox J2000
Constellation Auriga [1]
Right ascension 05h 41m 20.97707s [2]
Declination +29° 29′ 14.6958″ [2]
Apparent magnitude  (V)6.43 [3]
Characteristics
Evolutionary stage main sequence [4]
Spectral type B8IV [5]
U−B color index −0.39 [3]
B−V color index −0.11 [3]
Variable type eclipsing binary [6]
Astrometry
Radial velocity (Rv)18.00±4.3 [7] km/s
Proper motion (μ)RA: +15.94 [2] mas/yr
Dec.: −26.95 [2] mas/yr
Parallax (π)5.37±0.81  mas [2]
Distance approx. 610  ly
(approx. 190  pc)
Absolute magnitude  (MV)+0.11 [1]
Details
Mass 3.43 [4]   M☉
Radius 2.21 [8]   R☉
Luminosity 177 [4]   L☉
Surface gravity (log g)4.35 [8]   cgs
Temperature 12,589 [4]   K
Rotational velocity (v sin i)130 [9]  km/s
Age 157 [10]   Myr
Other designations
BD+29°953, HD 37646, HIP 26781, HR 1945, SAO 77393
Database references
SIMBAD data

HD 37646 is an eclipsing binary in the northern constellation of Auriga. The companion has only been detected by very shallow eclipses [6] and by the radial velocity variations it produces in the primary star. [11]

In addition to the spectroscopic companion, the 7th-magnitude star HD 37647 shares a common proper motion and parallax with HD 37646. The pair have an angular separation of 26.005″. [5]

References

  1. 1 2 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 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. 1 2 3 Tolbert, Charles Ray (May 1964), "A UBV Study of 94 Wide Visual Binaries", Astrophysical Journal, 139: 1105, Bibcode:1964ApJ...139.1105T, doi: 10.1086/147852
  4. 1 2 3 4 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv: 1201.2052 . Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
  5. 1 2 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
  6. 1 2 Shi, Xiang-Dong; Qian, Sheng-Bang; Li, Lin-Jia (2022). "New Pulsating Stars Detected in EA-type Eclipsing-binary Systems Based on TESS Data". The Astrophysical Journal Supplement Series. 259 (2): 50. arXiv: 2411.18854 . Bibcode:2022ApJS..259...50S. doi: 10.3847/1538-4365/ac59b9 .
  7. ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
  8. 1 2 Yu, Jie; Khanna, Shourya; Themessl, Nathalie; Hekker, Saskia; Dréau, Guillaume; Gizon, Laurent; Bi, Shaolan (2023). "Revised Extinctions and Radii for 1.5 Million Stars Observed by APOGEE, GALAH, and RAVE". The Astrophysical Journal Supplement Series. 264 (2): 41. arXiv: 2206.00046 . Bibcode:2023ApJS..264...41Y. doi: 10.3847/1538-4365/acabc8 .
  9. ↑ 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
  10. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv: 1606.08814 . Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031.
  11. ↑ Tkachenko, Andrew; Pavlovski, Krešimir; Serebriakova, Nadezhda; Bowman, Dominic M.; Ijspeert, Luc; Gebruers, Sarah; Southworth, John (2024). "Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties". Astronomy and Astrophysics. 683: A252. arXiv: 2312.14009 . Bibcode:2024A&A...683A.252T. doi:10.1051/0004-6361/202347793.
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