The ROSAT spectrum of the symbiotic nova AG Pegasi: evidence for colliding winds.
Abstract
Pointed ROSAT PSPC observations of the symbiotic nova AG Peg are presented and analyzed. A basic analysis shows that the X-rays are emitted by a hot - probably shock-heated - plasma with a temperature of a few MK. We suggest that we are facing the first definite observation of colliding winds in a symbiotic binary system. Using a one point model, we derive for the emitting plasma a characteristic temperature of 3.5x10^6^K, a luminosity of 0.01Lsun_^bol^, and an emission measure of 1.5x10^54^cm^-3^. A 2D hydrodynamic simulation resting on published system parameters reproduces these results.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1995
- Bibcode:
- 1995A&A...297L..87M
- Keywords:
-
- HYDRODYNAMICS;
- SHOCK WAVES;
- BINARIES: SYMBIOTIC;
- STARS: INDIVIDUAL: AG PEG;
- STARS: MASS-LOSS;
- X-RAYS: STARS