Contact binary star
binary star system whose component stars are very close
In astronomy, a contact binary is a binary star system where the stars are so close that they touch each other or have combined to share their atmospheres. A binary system where the stars share an atmosphere is also called an overcontact binary.[1][2] The name "contact binary" was invented by astronomer Gerard Kuiper in 1941.[3] Almost every contact binary is an eclipsing binary;[4] eclipsing contact binaries are known as W Ursae Majoris variables, named after W Ursae Majoris.[5]
The stars normally share the same temperatures and masses, as the bigger star normally gives some of its mass and temperature to the smaller star. But sometimes the stars touch physically but keep their same, different temperatures..[6]
References
change- ↑ Darling, David. "binary star". www.daviddarling.info. Retrieved 2019-05-06.
- ↑ Thompson, Michael J. (2006). An Introduction to Astrophysical Fluid Dynamics. London: Imperial College Press. pp. 51–53. ISBN 1-86094-615-1.
- ↑ Kuiper, Gerard P. (1941). "On the Interpretation of β Lyrae and Other Close Binaries". Astrophysical Journal. 93: 133. Bibcode:1941ApJ....93..133K. doi:10.1086/144252.
- ↑ Tassoul, Jean Louis; et al. (2000). Stellar Rotation. Cambridge, UK, New York: Cambridge University Press. p. 231. ISBN 0-521-77218-4.
- ↑ Mullaney, James (2005). Double and Multiple Stars and how to Observe Them. New York, London: Springer. p. 19. ISBN 1-85233-751-6.
- ↑ Csizmadia, Sz.; Klagyivik, P. (November 2004). "On the properties of contact binary stars". Astronomy and Astrophysics. 426 (3): 1001–1005. arXiv:astro-ph/0408049. Bibcode:2004A&A...426.1001C. doi:10.1051/0004-6361:20040430.