Astronomy Letters -- January 1997 -- Volume 23, Issue 1, pp. 37-42

A high-luminosity eclipsing binary system with a rapidly varying period in the galaxy M 33

A. S. Sharov and V. P. Goranskii
Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899 Russia
S. N. Fabrika
Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkyz, Stavropolskii krai, 357147 Russia

(Received July 2, 1996)

An eclipsing binary system with an orbital period of 33(d over dot)108, whose light varies over the range 16(m over dot)8(dash)17(m over dot)8 in B has been detected among the high-luminosity blue stars in M 33. One of the components apparently exhibits intrinsic variability with a small amplitude. The star lies at the center of a bipolar nebula seen in H alpha . The system is assumed to contain an accretion disk. © 1997 MAIK/Interperiodika

History Received: July 2, 1996
Subject Stars
PACS
  • CODE: 97.80.Hn
    Stars : Binary and multiple stars : [Eclipsing binaries]
  • CODE: 98.56.Ne
    Stellar systems; interstellar medium; galactic and extragalactic objects and systems; the Universe : Local group; Magellanic clouds : [Spiral galaxies (M31 and M33)]
  • CODE: 97.10.Ri
    Stars : Stellar characteristics and properties : [Luminosities; magnitudes; effective temperatures, color, and spectral classification]
  • CODE: 98.58.Hf
    Stellar systems; interstellar medium; galactic and extragalactic objects and systems; the Universe : Interstellar medium (ISM) and nebulae in external galaxies : [H II regions; emission and reflection nebulae]
  • CODE: 95.85.Kr
    Fundamental astronomy and astrophysics; instrumentation, techniques, and astronomical observations : Astronomical observations : [Visible (390(dash)750 nm)]
  • YEAR: 1996-97
Keywords eclipsing binary stars; luminescence; accretion disks; galaxies; H II regions
Doc. Type Experimental
Coden ALETEO