High Resolution Spectroscopy of the R127 Nebula

Details High Resolution Spectroscopy of the R127 Nebula High Resolution Spectroscopy of the R127 Nebula

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4486s&link_type=abstract

HST Proposal ID #4486

Computer Science

Hst Proposal Id #4486

Scientific paper

We propose to obtain medium resolution ultraviolet spectra of the emission nebula surrounding the LMC Luminous Blue Variable R127. The nebula contains the fossil record of the previous outbursts of this massive star, which is the extragalactic analog of the Galactic LBV AG Carinae. We will study the abundance of nitrogen, the primary nuclear product of this advanced stage of massive star evolution, and determine the density and velocity conditions in the nebula. The R127 circumstellar environment provides a view of the process by which massive stars interact with the interstellar medium and mix nucleosynthetic products into the surrounding gas. We will also determine the dust properties in the circumstellar shell by comparing a contemporaneous UV spectrum of the central star with the reflected spectrum in the shell. This technique has been used previously for AG Car. The shell is an IRAS source and we will be able to compute the dust heating directly by observing the stellar continuum.

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