T pyxidis
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Star T pyxidis |
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Ship compass | ||
| Right ascension | 09 h 04 m 41 s | ||
| declination | -32 ° 22 ′ 47 ″ | ||
| Apparent brightness | 15.8; at outbreak up to 6.5 mag | ||
| Typing | |||
| Spectral class | pec | ||
| Variable star type | NO | ||
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Other names and catalog entries |
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T Pyxidis ( T Pyx for short ) is a recurring nova 6,000 light years from Earth . In the years 1890, 1902, 1920, 1944 and 1966 there were outbursts of brightness down to 6.5 mag. On April 14, 2011, the beginning of a new outbreak was discovered.
The system is a binary star consisting of a white dwarf and a nearby stellar companion. Due to the proximity, material falls from the companion onto the surface of the white dwarf. If the nuclear focal point of hydrogen is reached as a result of the increasing pressure and temperature , there is a nova outbreak. The white dwarf itself remains undamaged and the material from the companion accumulates again on its surface, which then leads to another eruption after a few years.
The name part "T" follows the rules for naming variable stars and says that T Pyxidis is the third variable star that was discovered in the constellation Ship Compass (Latin Pyxis ).
literature
- Brian Warner. Cataclysmic Variable Stars. , Cambridge University Press, 1995, p. 27, ISBN 0-521-41231-5
Individual evidence
- ^ T Pyxidis outburst , 2011, AAVSO