Difference between revisions of "Triggers:CNe"

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(Created page with '* 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 ...')
 
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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
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* smaller amplitude: 4-9 mag
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* M_V at minimum is about 0-1 mag
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* example: RS Oph - 3 outbursts between 1957 and 1991 (AAVSO), exhibits some small variation in the baseline in minimum
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* 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