X-ray emission from wind blown interstellar bubbles
IV. ROSAT HRI observations of NGC 6888
Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
Corresponding author: H. J. Wendker, email@example.com
Accepted: 27 May 2002
We have observed the stellar wind blown bubble NGC 6888 with the ROSAT HRI. A map and a catalogue of X-ray filaments is derived, the typical filament being a few 0.1 pc in extent with an HRI count rate of a few 10-4 s-1. We show that this filamentary structure can qualitatively be modelled as local count rate enhancements due to denser gas near evaporating cool clumps which in turn are seen in the optical and probably are produced by instabilities after the passage of the primary shock front of the expanding bubble.
Key words: ISM: bubbles / ISM: individual objects: NGC 6888 / ISM: general / X-rays: ISM
© ESO, 2002