| |
 |
| Paper: |
Abundance Profile and Stellar Content of I ZW 18 |
| Volume: |
147, Abundance Profiles: Diagnostic Tools for Galaxy History |
| Page: |
116 |
| Authors: |
Legrand, Francois |
| Abstract: |
New observations of the metal poor galaxy I Zw 18 are discussed. Wolf-Rayet stars of WC type have been detected in the NW-H ii region contrary to evolutionary synthesis model predictions. Implications on the mass loss rate and on the formation processes of WR stars are discussed. A very homogeneous metal abundance is observed within the H ii region. This emphasizes the problem of the dispersal and mixing of newly synthesized elements in a starburst. Different scenarios are discussed, showing that metals remain most likely hidden in a hot phase and that the observed present metallicity is the result of a previous star formation event. |
|
|
|
|
|
