Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.4008d&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #40.08; Bulletin of the American Astronomical Society, Vol. 29, p.1268
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present a UV-optical analysis of a complex cloud-shock interaction region known as ``XA'' in the Cygnus Loop supernova remnant. We combine optical [O III] lambda 5007 and Hα images and a far-UV image from the Ultraviolet Imaging Telescope with far-UV spectral data at 5 positions from the Hopkins Ultraviolet Telescope (HUT) and 22 spatially-resolved, low resolution IUE spectra in the 1200-2000 Angstroms range. By mapping the spatial variations of strong forbidden, intercombination, and resonance lines across the region, we attempt to unravel the competing causes of the observed spatial variations, such as shock velocity or ionization variations, shock incompleteness, and resonance line scattering effects. By combining with low resolution optical longslit and echelle spectra, we hope to investigate the three-dimensional structure in this region to better understand the cloud-shock interaction process. This research is supported by NASA contract NAS 5-27000 and STScI grant GO-05365.01-93A to the Johns Hopkins University, and grant NAG 8-1074 to the Smithsonian Astrophysical Observatory.
Blair William Patrick
Danforth Charles
Raymond John C.
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