A Chandra Study of the Planetary Nebula NGC 246

Details A Chandra Study of the Planetary Nebula NGC 246 A Chandra Study of the Planetary Nebula NGC 246

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..768s&link_type=abstract

Chandra Proposal ID #03200659

Computer Science

Chandra Proposal Id #03200659

Scientific paper

We propose ACIS observations of the planetary nebula NCG 246 to search for nebular emission from thermal gas at temperatures between 300,000 and 1 million K. In models of wind-blown bubbles, the fast wind from the central star (3500 km/s for NGC 246) shocks when it encounters the high pressure imposed by the external shell. New images of NGC 246 in [Ne V] show an exceptionally bright structure surrounding a faint central region, possibly a tracer of the boundary of the wind-blown bubble. Since the central star has Wolf-Rayet abundances, the CNO-processed gas is expected to have an enormous cooling rate. ACIS images and spectra will constrain the temperature, composition, and density of the X-ray emitting gas inside [Ne V] boundary.

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