Possible optical detection of a filament from the Monogem ring

Details Possible optical detection of a filament from the Monogem ring Possible optical detection of a filament from the Monogem ring

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...131..375r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 131, no. 2, Feb. 1984, p. 375-377.

Astronomy and Astrophysics

Astrophysics

2

Interstellar Matter, Shock Fronts, Supernova Remnants, Astronomical Photography, Line Spectra, Oxygen, Ultraviolet Spectra

Scientific paper

Consideration is given to a previously unknown faint interstellar filament found on a deep U-plate with a 4h exposure time. The filament is interpreted as pure forbidden O II doublet radiation at 372 nm with an emission measure around 3-5 cm to the -6 pc. It is identified with a slow shock front (30-50 km/s) from the Monogem SNR at a distance of 300 pc as deduced by Nousek et al. (1981). A photographic search in these forbidden O II lines is shown to hold the greatest promise for detecting nearby slow shock fronts from old supernova remmants.

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