| Autor: |
Pavlenko, Elena P., Shugarov, Sergei Yu., Goranskij, Vitaly P., Primak, Nataly V. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2002, Vol. 637 Issue 1, p519, 8p |
| Abstrakt: |
We present a result of our multicolor investigation of the old non-magnetic novae Q Cyg (Nova Cyg 1876), DI Lac (Nova Lac 1910), V446 Her (Nova Her 1960) in 1991-2001 and magnetic nova V1500 Cyg (Nova Cyg 1975) in 2000-2001. The non-magnetic novae display the outburst-like brightening in a wide region of amplitudes (0[sup m] .5 - 2[sup m] .5) and cycle duration (∼ 23-d ∼ 65-d). Similarly to the dwarf novae outbursts, they show a loops on the color magnitude diagram. A shape of the loop (its width and slope) is different for different novae. In some cases the behavior of oubursts is in agreement with the model of tidal instability of accretion disk. Magnetic nova V1500 Cyg displays a strong brightening every 8.5-d, probably caused by a periodical enhancement of accretion stream and/or accretion ring surrounding the magnetic dwarf in asynchronous binary. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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