Dwarf Nova Outbursts. I. The UV Delay

• Autorzy: Smak J. I.
• Języki publikacji: EN

Abstrakty

EN

Models of dwarf nova outbursts are calculated for a range of relevant parameters: the masses of the components which determine the orbital period and the radius of the disk, the mass transfer rate, and the viscosity parameter α. The visual (λ 5500 Å) and ultraviolet (λ 1200 Å) light curves are calculated using black body and Kurucz fluxes. The resulting UV delays show strong dependence on model parameters and, in particular, confirm the existence of a dichotomy between Type A and Type B outbursts. The model predicted UV delays agree quite well with observations, with the "best-fit" for α_hot between 0.1 and 0.2. Earlier, negative conclusions and the controversy around the "problem of UV delay" resulted primarily from incorrect outer boundary conditions and other model simplifications.

Słowa kluczowe

EN

binaries: close; novae; cataclysmic variables

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 1998
• Tom: Vol. 48, No. 4
• Strony: 677--693
• Opis fizyczny: Bibliogr. 26 poz., tab., wykr.

Twórcy

autor

Smak J. I.

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

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