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Hot, Massive Stars in the Extremely Metal-Poor Galaxy, I Zw 18
Author and Affiliation:
Heap, Sara R.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Malumuth, Eliot M.
Abstract: The 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.
Publication Date: Jan 01, 2010
Document ID:
20100025195
(Acquired Jul 15, 2010)
Subject Category: ASTROPHYSICS
Document Type: Conference Paper
Meeting Information: Science with the Hubble Space Telescope - III: Two Decades and Counting; 11-14 Oct. 2010; Venice, Italy; Italy
Meeting Sponsor: European Space Agency; Paris, France
NASA; Washington, DC, United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: HOT STARS; MASSIVE STARS; METALLICITY; INTERSTELLAR MATTER; IONIZATION; GALAXIES; HUBBLE SPACE TELESCOPE; GAMMA RAY BURSTS; STELLAR EVOLUTION; STELLAR ATMOSPHERES
Availability Source: Other Sources
Availability Notes: Abstract Only
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