Physics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9120s&link_type=abstract
HST Proposal ID #9120
Physics
Hst Proposal Id #9120 Ism And Circumstellar Matter
Scientific paper
The final phase of the evolution of low- and intermediate-mass stars, the Planetary Nebula {PN} ejection, is thought to provide the main source of carbon and nitrogen enrichment in galaxies. Stellar generations forming from a carbon- and nitrogen-enriched medium are a necessary condition for planetary and life evolution. It is essential to understand how stars go through the process of shedding their chemically- enriched shells, and to test the predictions of stellar evolution theory on the relationship between stellar mass and elemental enrichment. LMC PNe are ideal probes for this study. Their abundances can be directly related to the mass of the central stars and to that of the stellar progenitor, without the great {distance and reddening} uncertainties that affect Galactic PNe. The UV lines are essential for calculating the abundances of the element related to stellar evolution {C, N, O} and progenitor populations {e.g., Ne}. We propose to acquire STIS UV spectroscopy for LMC PNe whose morphology has been previously determined with HST. We will derive the {C, N, O} abundance-to-mass relation, and determine the extent to which the mass of the progenitors of asymmetric PNe exceed that of symmetric PNe.
No associations
LandOfFree
Planetary Nebulae in the LMC: a study on stellar evolution and Populations. 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 Planetary Nebulae in the LMC: a study on stellar evolution and Populations., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planetary Nebulae in the LMC: a study on stellar evolution and Populations. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200550