Starbursts and the `POLLUTION' of the Igm: AXAF Observations of the Superwind from NGC 253

Details Starbursts and the `POLLUTION' of the Igm: AXAF Observations of the Superwind from NGC 253 Starbursts and the `POLLUTION' of the Igm: AXAF Observations of the Superwind from NGC 253

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...39h&link_type=abstract

Chandra Proposal ID #01600352

Computer Science

Chandra Proposal Id #01600352

Scientific paper

A popular paradigm is that supernova-driven `superwinds' have chemically-enriched the IGM and have affected the chemical evolution of galaxies. We propose to test this idea by measuring the heavy-element content of the superwind in the prototypical starburst galaxy NGC 253. Prior X-ray data have demonstrated the spectral/spatial complexity of starbursts, but can not provide model-independent measurements of abundances. The unprecedented spatial resolution and good energy resolution of AXAF will finally allow us to determine chemical abundances in a superwind and determine if the flow will escape the galaxy. To meet these goals we propose a 120 ks observation of NGC 253 with ACIS-S, using the high efficiency of the BI chips to obtain high S/N,spatially-resolved spectra of the hot gas.

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