Dwarf Nova Outbursts. III. The Viscosity Parameter α

• Autorzy: Smak J.
• Języki publikacji: EN

Abstrakty

EN

Visual light curves based on dwarf nova models, covering a broad range of relevant parameters, are used to determine the widths of outbursts, rates of decline, and UV delays, as well as their dependence on the orbital period. From a comparison with the observational data it is found that the value of α on the hot branch of the Σ-T_e relation is α_hot≈0.2. An important test is also made concerning the tidal radii of disks. A comparison of the absolute visual magnitudes at maximum, obtained from model light curves, with the observed M_V(max) gives R_tid/R_Roche≈0.9, which is the standard value used in model calculations.

Słowa kluczowe

EN

accretion; accretion disks; binaries: close; novae; cataclysmic variables

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 1999
• Tom: Vol. 49, No. 3
• Strony: 391--401
• Opis fizyczny: Bibliogr. 20 poz., tab., wykr.

Twórcy

autor

Smak J.

• N. Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland

Bibliografia

• Bailey, J. 1975, J. Brit. astr. Ass., 86, 30.
• Gicger, A. 1987, Acta Astron., 37, 29.
• Hameury, J.-M., Menou, K., Dubus, G., and Lasota, J.-P. 1998, MNRAS, 298, 1048.
• Hameury, J.-M., Lasota, J.-P., and Dubus, G. 1999, MNRAS, 303, 39.
• Harrop-Allin, M.K., and Warner, B. 1996, MNRAS, 279, 219.
• Ichikawa, S., and Osaki, Y. 1992, Publ. Astr. Soc. Japan, 44, 15.
• Kurucz, R.L. 1993, CD-ROM No. 13.
• Mantle, V.J., and Bath, G.T. 1983, MNRAS, 202, 151.
• Papaloizou, J., and Pringle, J.E. 1977, MNRAS, 181, 441.
• Ritter, H., and Kolb, U. 1998, Astron. Astrophys. Suppl. Ser., 129, 83.
• Smak, J. 1984, Acta Astron., 34, 161.
• Smak, J. 1992, Acta Astron., 42, 323.
• Smak, J. 1996, Acta Astron., 46, 377.
• Smak, J. 1998, Acta Astron., 48, 677 (Paper I).
• Smak, J. 1999, Acta Astron., 49, 383 (Paper II).
• Szkody, P., and Mattei, J.A. 1984, P.A.S.P., 96, 988.
• van Paradijs, J. 1983, Astron. Astrophys., 125, L16.
• Warner, B. 1987, MNRAS, 227, 23.
• Warner, B. 1995, "Cataclysmic Variable Stars" (Cambridge Univ. Press).
• Webbink, R.F. 1990, "Accretion-Powered Compact Binaries", Ed. C.W. Mauche (Cambridge Univ. Press).