Hot, Massive Stars in I Zw 18

Details Hot, Massive Stars in I Zw 18 Hot, Massive Stars in I Zw 18

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bsrsl..80..149h&link_type=abstract

Société Royale des Sciences de Liège, Bulletin, vol. 80, p. 149-154 (Proceedings of the 39th Liège Astrophysical Colloquium, hel

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present the far-ultraviolet spectrum of the northwest component of I Zw 18, a blue compact galaxy having a very low metallicity. The spectrum is compatible with continuous star-formation over the past ˜ 15 Myr (CSF age), and a very low metallicity, log Z/Z_&sun; ˜ -1.7, although the stellar surface may be enhanced in carbon. Stellar winds are very weak, and the edge velocity of wind lines is very low (˜ 250 km/s).

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