BB Doradus

BB Doradus or BB Dor is a cataclysmic variable, a pre-nova star, thus a close pair binary star system. It is composed of a red dwarf and a white dwarf.[4] Observations of the white dwarf's faint but certain accretion disk are consistent with it being at ~10° inclination (to the line of sight from the Earth).[5]

BB Dor

A visual band light curve for BB Doradus, adapted from Rodríguez-Gil et al. (2012)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Dorado
Right ascension 05h 29m 28.66s
Declination −58° 54′ 46.7″
Apparent magnitude (V) 14.3-19.3
Characteristics
Spectral type WD + M3-4V
Variable type SW Sex[2]
Astrometry
Parallax (π)1.0871 ± 0.0263 mas
Distance3,000 ± 70 ly
(920 ± 20 pc)
Absolute magnitude (MV)15.52[3]
Details
Temperature9365 K
Other designations
BB Dor, GSC 08530-00528, AAVSO 0528-58, EC 05287-5857, 1RXS J0529-5854.
Database references
SIMBADdata

Its parallax (movement against background stars due to the Earth's orbit around the Sun) given by the Gaia space observatory's second data release puts the pair at about 3,000 light years away.[6]

References
  1. Rodríguez-Gil, P.; Schmidtobreick, L.; Long, K. S.; Gänsicke, B. T.; Torres, M. A. P.; Rubio-Díez, M. M.; Santander-García, M. (May 2012). "The fight for accretion: discovery of intermittent mass transfer in BB Doradus in the low state". Monthly Notices of the Royal Astronomical Society. 422 (3): 2332–2340. arXiv:1202.4921. Bibcode:2012MNRAS.422.2332R. doi:10.1111/j.1365-2966.2012.20783.x. S2CID 119211508. Retrieved 1 January 2022.
  2. Schmidtobreick, L.; et al. (October 2011). Henney, W. J.; Torres-Peimbert, S. (eds.). The structure of BB Doradus in quiescence. XIII Latin American Regional IAU Meeting. Revista Mexicana de Astronomía y Astrofísica. Vol. 40. p. 288-288. Bibcode:2011RMxAC..40..288S.
  3. "V* BB Dor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-11-22.
  4. Watson, Christopher (24 February 2012). "BB Doradus". AAVSO Website. American Association of Variable Star Observers. Retrieved 5 November 2014.
  5. Godon, Patrick; et al. (November 2008). "Far Ultraviolet Spectroscopic Explorer Spectroscopy of the Nova-like Cataclysmic Variable BB Doradus". The Astrophysical Journal. 687 (1): 532–541. arXiv:0805.4209. Bibcode:2008ApJ...687..532G. doi:10.1086/591494. S2CID 17100291.
  6. 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.
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