The ROSAT spectrum of the symbiotic nova AG Pegasi: evidence for colliding winds.

Details The ROSAT spectrum of the symbiotic nova AG Pegasi: evidence for colliding winds. The ROSAT spectrum of the symbiotic nova AG Pegasi: evidence for colliding winds.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297l..87m&link_type=abstract

Astronomy and Astrophysics, v.297, p.L87

Astronomy and Astrophysics

Astrophysics

27

Hydrodynamics, Shock Waves, Binaries: Symbiotic, Stars: Individual: Ag Peg, Stars: Mass-Loss, X-Rays: Stars

Scientific paper

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.

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