BG Geminorum

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
BG Geminorum
Satellite image of binary star system BG Geminorum

Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Gemini
Right ascension  06h 03m 30.81s[1]
Declination +27° 41′ 50.7″[1]
Apparent magnitude (V) 12.9 - 13.6[2]
Characteristics
Spectral type K0I[2]
Astrometry
Distance7340 ly
(2.25±0.25[2] pc)
Orbit[2]
Period (P)91.645 days
Semi-major axis (a)>0.63 ± 0.04 AU
Inclination (i)>80°
Details
K0I
Mass>0.7[3] M
Temperature4,500[2] K
Black hole or class B
Mass>3.5[3] M
Other designations
BG Geminorum, 2MASS J06033081+2741506
Database references
SIMBADdata

BG Geminorum is an eclipsing binary star system in the constellation Gemini. It consists of a K0 supergiant with a more massive but unseen companion. The companion is likely to be either a black hole or class B star. Material from the K0 star is being transferred to an accretion disk surrounding the unidentified object.[3]

References[edit]

  1. ^ a b Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C. 2246. Bibcode:2003yCat.2246....0C.
  2. ^ a b c d e Benson, Priscilla J (2000). "An Optical Study of BG Geminorum: An Ellipsoidal Binary with an Unseen Primary Star". The Astronomical Journal. 119 (2): 890. arXiv:astro-ph/9911179. Bibcode:2000AJ....119..890B. doi:10.1086/301230.
  3. ^ a b c Kenyon, Scott J (2002). "The Eclipsing Binary BG Geminorum: Improved Constraints on the Orbit and the Structure of the Accretion Disk". The Astronomical Journal. 124 (2): 1054. arXiv:astro-ph/0205157. Bibcode:2002AJ....124.1054K. doi:10.1086/341651.