UV Lightbulbs to Probe Supernova Remnants in the LMC and the Galaxy

Details UV Lightbulbs to Probe Supernova Remnants in the LMC and the Galaxy UV Lightbulbs to Probe Supernova Remnants in the LMC and the Galaxy

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..449w&link_type=abstract

NOAO Proposal ID #2000B-0449

Physics

Scientific paper

We propose to use spectroscopy from the 1.5-m to identify background stars or QSOs which can serve as UV ``lightbulbs'' to probe the unshocked material in Galactic and LMC supernova remnants. Through previous imaging from the 0.9m, we have identified numerous candidate blue objects; we now need spectra to distinguish between likely background objects (O-B stars, QSOs, ...) and foreground ``contaminants'' such as white dwarfs. These observations will provide the basis for future UV spectra of these objects from HST. UV absorption studies can give us ``core samples'' through SNRs, as has been done for SN 1006 using the Schweizer-Middleditch star. For young SNRs this is one of very few ways to probe undecelerated ejecta. More generally, absorption studies provide information about the dynamics and ionization state of a significant constituent of the SNR: that portion which is not currently shocked.

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