Computer Science
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9054b&link_type=abstract
HST Proposal ID #9054
Computer Science
Hst Proposal Id #9054 Galaxies
Scientific paper
I Zw 18 is a blue compact galaxy {BCD} with the smallest known abundance of heavy elements yet observed. Although it is currently undergoing an intense period of star formation, debate continues to focus on the presence of any older generations of stars in this system. If its star formation history is truly restricted to the last 50 Myr, the existence of I Zw 18 demonstrates that the formation of galaxies can be delayed until the present epoch. This galaxy may represent a local template for the young galaxies that will be observed with NGST at high redshift, and as such it is essential that we understand its evolutionary status. Narrow-band imaging and spectroscopy have focused on the ionized gas in this galaxy. Broad-band imaging has resolved the brighter stellar populations, but due to the uncertain distance of I Zw 18 and its high level of crowding, interpretation of this imaging has been disputed. We propose a spatially resolved far-UV spectroscopic map of this critically important galaxy. Our data will investigate how star formation propagates across a starbursting galaxy, determine if heavy elements have been incorporated into the young hot stars or instead have been blown out of the galaxy, extend our understanding of mass loss and stellar winds to very low metallicity, and create a template for metal-poor starbursts observed at high redshift.
No associations
LandOfFree
Star Formation Triggers and Chemical Reprocessing in I Zw 18 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Star Formation Triggers and Chemical Reprocessing in I Zw 18, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Star Formation Triggers and Chemical Reprocessing in I Zw 18 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200439