New Optical Data on the Supernova Remnant 3C 400.2

Details New Optical Data on the Supernova Remnant 3C 400.2 New Optical Data on the Supernova Remnant 3C 400.2

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..461b&link_type=abstract

Publications of the Astronomical Society of the Pacific v.100, p.461

Astronomy and Astrophysics

Astronomy

9

Nebulae: Supernova Remnants, Spectrophotometry

Scientific paper

We present optical imaging and spectroscopic data for the faint galactic supernova remnant 3C 400.2. A deep CCD image of the southwestern region obtained with an Hα + [N II] interference filter shows a complex morphology with many chaotic filaments and considerable diffuse emission. A comparable exposure in the north-central region, centered on the brightest X-ray emission, shows faint, diffuse optical emission probably belonging to the remnant. Spectra of two of the optical filaments in the southwest indicate strong [N II], [S II], and [O I] emission lines relative to Ha, characteristic of shock-heated gas. The electron densities determined from the ratio of [S II] λ6717 and λ6731 at our two positions indicate a real variation is present. However, the range of pressures indicated for the optical filaments is still consistent with rough pressure equilibrium between the X-ray and optical gas.

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