Hostname: page-component-77c89778f8-vsgnj Total loading time: 0 Render date: 2024-07-17T14:31:38.593Z Has data issue: false hasContentIssue false
  • English
  • Français

AM Herculis Type Stars - Magnetic Binaries

Published online by Cambridge University Press:  12 April 2016

W. Krzemiński
W. Krzemiński*
Affiliation:
N. Copernicus Astronomical Center Polish Academy of Sciences, Al. Ujazdowskie 4, 00-478 Warszawa, Poland

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A new class of close binary stars, proposed to be called polars, has been discovered during recent year; its prototype is AM Her. The three known polars, AM Her, AN UMa, and W Pup, are polarization, spectrum, radial velocity, optical, and infrared variables of short periods of 3.1, 1.9, and 1.7 hours, respectively (Tapia 1977 a, b, c; Michalsky et al. 1977; Krzemiński and Serkowski 1977; Stockman et al. 1978; Herbig 1960; Cowley and Crampton 1977; Priedhorsky 1977; Greenstein et al. 1977; Berg and Duthie 1977; Szkody and Brownlee 1977; Olson 1977; Mumford 1977; Priedhorsky and Krzemiński 1978; Neugebauer et al. 1977). AM Her itself has been found to have strong soft X-ray emission in the 0.1 - 0.4 keV band (Hearn and Richardson 1977) and a hard X-ray spectrum (about half the observed 2-60 keV energy lies above 28 keV, Swank et al. 1977) both modulated with a 3.1 hour period. No X-ray emissions from the other systems have been detected so far.

Type
Part II: Cataclysmic Variables
Information
International Astronomical Union Colloquium , Volume 42: The Interaction of Variable Stars with their Environment , 1977 , pp. 238 - 241
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

References

Berg, R.A., and Duthie, J.G. 1977, Ap. J., 211, 859.Google Scholar
Bond, H.E., and Tifft, W.G. 1974, Pub. A.S.P., 86, 981.Google Scholar
Chanmugam, G., and Wagner, R.L. 1977, Ap. J. (Letters), 213, L13.Google Scholar
Cowley, A.P., and Crampton, D. 1977, Ap.J. (Letters), 212, L121.Google Scholar
Crampton, D., and Cowley, A.P. 1977, Pub. A.S.P., 89, 374.Google Scholar
Greensteln, J.L., Sargent, W.L.W., Boroson, T.A., and Boksenberg, A. 1977, preprint.Google Scholar
Hearn, D.R., and Richardson, J.A. 1977, Ap. J. (Letters), 213, L115.Google Scholar
Herbig, G.H. 1960, Ap. J., 132, 76.Google Scholar
Jameson, R.F. 1977, IAU Circ, No 3095.Google Scholar
Kruszewski, A. 1978, in Nonstationary Evolution of Close Binaries, 2nd Symposium of the Multilateral Cooperation between the Academies of Sciences of Socialist Countries, Warsaw, 20-25 June 1977, Zytkow, Anna, ed.Google Scholar
Krzemiński, W., and Serkowski, K. 1977, Ap. J. (Letters), 216, L45.Google Scholar
Michalsky, J.J., Stokes, G.M., and Stokes, R.A. 1977, Ap. J.(Letters), 216, L35.Google Scholar
Mumford, G.S. 1977, Sky and Telescope, 54, 194.Google Scholar
Neugebauer, G., Werner, M.W., Priedhorsky, W.C., and Krzemifiski, W. 1977, in preparation.Google Scholar
Olson, E.C. 1977, Ap. J., 215, 166.Google Scholar
Priedhorsky, W.C. 1977, Ap. J. (Letters), 212, L117.Google Scholar
Priedhorsky, W.C., and Krzemiński, W. 1978, Ap. J., 219.Google Scholar
Stockman, H.S. 1978, Ap. J., in press.Google Scholar
Stockman, H.S., Schmidt, G.D., Angel, J.R.P., Liebert, J., Tapia, S. and Beaver, E.A. 1978, Ap. J., in press.Google Scholar
Swank, J., Lampton, M., Boldt, E., Holt, S., and Serlemitsos, P. 1977, Ap. J. (Letters), 216, L71.Google Scholar
Szkody, P., and Brownlee, D.E. 1977, Ap. J. (Letters), 212, L113.Google Scholar
Tapia, S. 1977a, Ap. J. (Letters), 212, L125.Google Scholar
Tapia, S. 1977b, IAU Circ, No. 3049.Google Scholar
Tapia, S. 1977c, IAU Circ, No. 3054.Google Scholar
Tapia, S., Krzemiński, W., and Priedhorsky, W.C. 1977, preprint.Google Scholar