Symbiotic Systems in the Magellanic Clouds CYC3 Medium

Details Symbiotic Systems in the Magellanic Clouds CYC3 Medium Symbiotic Systems in the Magellanic Clouds CYC3 Medium

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4494v&link_type=abstract

HST Proposal ID #4494

Computer Science

Hst Proposal Id #4494

Scientific paper

We propose FOS observations of symbiotic systems in the Magellanic Clouds. The goal of this proposal is twofold : (1) The main goal is an accurate determination of the luminosity and radiation temperature of the hot component in symbiotic systems. That knowledge is of prime importance when trying to situate symbiotics in an evolutionary scenario. Since distances to galactic symbiotics are very badly known, observations in the Magellanic Clouds can be the basis for a breakthrough. (2) From the nebular spectrum we can fairly easily determine relative CNO abundances of symbiotic nebulae. As the nebula has its origin in the red giant, this provides a straightforward method for determining relative C/N/O abundances of the Magellanic red giants without the uncertainties of a stellar atmosphere analysis. Up to now almost all information about the chemistry of the Clouds has been derived from H II regions and planetary nebulae. The proposed observations present therefore also a new possibility for studying abundances in the Magellanic Clouds.

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