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Hot, Massive Stars in the Extremely Metal-Poor Galaxy, I Zw 18The carbon-enhanced metal-poor galaxy, I Zw 18, is the Rosetta Stone for understanding galaxies in the early universe by providing constraints on the IMF of massive stars, the role of galaxies in reionization of the universe, mixing of newly synthesized material in the ISM, and gamma-ray bursts at low metallicity, and on the earliest generations of stars producing the observed abundance pattern. We describe these constraints as derived from analyses of HST/COS spectra of I Zw 18 including stellar atmosphere analysis and photo-ionization modeling of both the emission and absorption spectra of the nebular material and interstellar medium.
Document ID
20100025195
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Heap, Sara R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Malumuth, Eliot M.
Date Acquired
August 24, 2013
Publication Date
January 1, 2010
Subject Category
Astrophysics
Meeting Information
Meeting: Science with the Hubble Space Telescope - III: Two Decades and Counting
Location: Venice, Italy
Country: Italy
Start Date: October 11, 2010
End Date: October 14, 2010
Sponsors: European Space Agency, NASA Headquarters
Distribution Limits
Public
Copyright
Other

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