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- Volume 80 - Année 2011
- Hot, Massive Stars in I Zw 18
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Hot, Massive Stars in I Zw 18
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Abstract
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/Zo ~ -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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A propos de : Sara R. Heap
NASA’s Goddard Space Flight Center, Mail Code 667, Greenbelt MD, USA
A propos de : Ivan Hubeny
University of Arizona, Tucson AZ, USA
A propos de : Thierry Lanz
University of Maryland, College Park MD, USA
A propos de : Wayne Landsman
NASA’s Goddard Space Flight Center, Mail Code 667, Greenbelt MD, USA, and Adnet Systems, Inc., Rockville MD, USA
A propos de : Don Lindler
NASA’s Goddard Space Flight Center, Mail Code 667, Greenbelt MD, USA, and Sigma Space, Inc., Lanham MD, USA
A propos de : Eliot Malumuth
NASA’s Goddard Space Flight Center, Mail Code 667, Greenbelt MD, USA, and Wyle Information Systems, McLean VA, USA
