Optical and far-infrared observations of the galactic filamentary nebula at 1723 - 46

Details Optical and far-infrared observations of the galactic filamentary nebula at 1723 - 46 Optical and far-infrared observations of the galactic filamentary nebula at 1723 - 46

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..291m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 291-298. Research supported by British Council.

Astronomy and Astrophysics

Astronomy

4

Far Infrared Radiation, Infrared Astronomy, Nebulae, Radial Velocity, Supernova Remnants, Visual Observation, Astronomical Models, Astronomical Spectroscopy, Emission Spectra, H Alpha Line, Infrared Astronomy Satellite

Scientific paper

Spatially resolved H-alpha profiles have been obtained over a filamentary nebula of large angular diameter. Evidence for radial expansion of 25-35 km/s is found. However, an anomalous velocity features at about -80 km/s with respect to the systemic radial velocity is present in the positional-velocity data array over a fine filament at the edge of the nebula. Filaments of far infra-red emission are found in scans by the IRAS satellite. These are nearly coincident with and parallel to the brightest optical filaments. A shell with a mass less than 2000 solar masses, kinetic energy less than 1.8 x 10 exp 49 erg and momentum less than 1.2 x 10 exp 43 gm cm/s is implied. This filamentary nebula then appears to be the manifestation of a supernova remnant in its momentum conserving phase though the high speed optical feature remains unexplained in this simple model.

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