Scanning interferometer observations of the SNR N186D in the large Magellanic cloud

Details Scanning interferometer observations of the SNR N186D in the large Magellanic cloud Scanning interferometer observations of the SNR N186D in the large Magellanic cloud

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..230l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 230-238.

Astronomy and Astrophysics

Astrophysics

15

H Ii Regions, Interferometers, Magellanic Clouds, Supernova Remnants, Brightness Distribution, Electron Density (Concentration), Emission Spectra, H Alpha Line, Velocity Distribution

Scientific paper

The separation of the gaseous layers belonging to the SNR N186D and to the superimposed H II region N186E is made from scanned interferometric observations. The velocity field and H-alpha intensity map of the SNR are established with a resolution of 10 x 10 arcsec over the 2 arcmin field, where soft X-rays are emitted. The SNR radial velocities are found to be spatially separated into two zones: one with high recessional velocities (relative to the systemic velocity) which is coincident with forbidden O III emission already known, and another zone with high approaching velocities which seems to be associated with bright forbidden S II filaments. A model of spherical (but not symmetrical) expansion with a velocity of 90 km/s can explain the velocity field. The SNR shock could have induced a secondary shock of lower velocity (V = 50 km/s) in the region of interaction with the bubble.

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