Diffuse Hot Gas in the Extremely Metal-Poor Galaxy i ZW 18

Details Diffuse Hot Gas in the Extremely Metal-Poor Galaxy i ZW 18 Diffuse Hot Gas in the Extremely Metal-Poor Galaxy i ZW 18

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..208b&link_type=abstract

Chandra Proposal ID #01600963

Computer Science

Chandra Proposal Id #01600963

Scientific paper

I Zw 18 is the most metal-poor galaxy known so far. It was interpreted as a young galaxy, which is incompatible with its recently observed high carbon abundance. Kpc-sized expanding shells and the newly detected extended X-ray emission indicate that I Zw 18 is experiencing a large scale outflow of gas into its halo. If it can be shown, that the metals created by the starburst are locked in the hot gas, the evolutionary state of I Zw 18 could be understood. We propose an AXAF study of I Zw 18 using ACIS-S to accurately determine the properties of the diffuse hot gas in I Zw 18 and its halo. Combined with HST data on the warm ionized gas and stellar content, this will sensitively probe the evolutionary state of I Zw 18 and test the galactic wind paradigm of dwarf galaxy evolution.

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