Enhanced Mass Transfer in Dwarf Novae of the SU~UMa Type During Their Outbursts and Superoutbursts

• Autorzy: Smak J.
• Języki publikacji: EN

Abstrakty

EN

Observational data for five dwarf novae of the SU UMa type provide several strong arguments in favor of a significant enhancement in the mass transfer rate during their outbursts and superoutbursts. The mass transfer rates during normal outbursts are estimated from the amount of accreted mass assuming the theoretical mass transfer rate at quiescence, based on models involving gravitational waves. The resulting rates M_enh≈0.6-1.8×10¹⁷ g/s imply enhancement by a factor of 15-46, which is consistent with observational evidence for VW Hyi and with theoretical predictions. The mass transfer rates during superoutbursts are enhanced to M_enh≈3-6×10¹⁷ g/s. The corresponding enhancement ratios range from ≈20-60 (when the mass transfer rates at quiescence are obtained under assumption of no enhancement during normal outbursts) up to ≈100 (resulting from the assumption of the theoretical mass transfer rate during quiescence).

Słowa kluczowe

EN

accretion; accretion disks; novae; cataclysmic variables; stars: dwarf novae; stars: individual: YZ Cnc; stars: individual: OY Car; stars: individual: Z Cha; stars: individual: VW Hyi; stars: individual: SU UMa

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2004
• Tom: Vol. 54, No. 3
• Strony: 221--231
• Opis fizyczny: Bibliogr. 23 poz., tab., wykr.

Twórcy

autor

Smak J.

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

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