Difference between revisions of "Triggers:CNe"
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* slow decline, between few days and 100 days (fast: type A, slow: type B, very slow: type C) | * slow decline, between few days and 100 days (fast: type A, slow: type B, very slow: type C) | ||
* 15 days after maximum its Mv = -5.5mag, independent on speed or class | * 15 days after maximum its Mv = -5.5mag, independent on speed or class | ||
| + | |||
| + | '''Recurrent novae''': | ||
| + | * are produced by a white dwarf star and a red giant circling about each other in a close orbit | ||
| + | * recurrent every 10-100 years | ||
| + | * smaller amplitude: 4-9 mag | ||
| + | * M_V at minimum is about 0-1 mag | ||
| + | * example: RS Oph - 3 outbursts between 1957 and 1991 (AAVSO), exhibits some small variation in the baseline in minimum | ||
| + | * decline within few days | ||
Revision as of 14:46, 28 July 2009
- there is roughly 30 novae per year in the Milky Way and about 20 in other galaxies
- absolute magnitude <math>M_V = -8 mag</math>
- amplitude between 6 and 15 mag
- quick rise of few days
- slow decline, between few days and 100 days (fast: type A, slow: type B, very slow: type C)
- 15 days after maximum its Mv = -5.5mag, independent on speed or class
Recurrent novae:
- are produced by a white dwarf star and a red giant circling about each other in a close orbit
- recurrent every 10-100 years
- smaller amplitude: 4-9 mag
- M_V at minimum is about 0-1 mag
- example: RS Oph - 3 outbursts between 1957 and 1991 (AAVSO), exhibits some small variation in the baseline in minimum
- decline within few days
