Scanning interferometer observations of the SNR N 186D in the Large Magellanic Cloud.
Abstract
The separation of the gaseous layers belonging to the supernova remnant (SNR) N 186D and to the superimposed H II region N 186E is made from scanned interferometric observations (CIGALE equipment). The velocity field and the Hα intensity map of the SNR are established with a resolution of 10" x 10" over the 2' 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 [O III] emission already known and another zone with high approaching velocities which seems to be associated with bright [S II] filaments. This latter zone could be the result of the interaction of the SNR shock with a portion of the bubble N 186E. A model or spherical (but not symmetrical) expansion with a velocity of 90 km s^-1^ can explain the velocity field. The SNR shock could have induced a secondary shock of lower velocity (V = 50 km s^-1^) in the region of interaction with the bubble.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1989
- Bibcode:
- 1989A&A...208..230L
- Keywords:
-
- H Ii Regions;
- Interferometers;
- Magellanic Clouds;
- Supernova Remnants;
- Brightness Distribution;
- Electron Density (Concentration);
- Emission Spectra;
- H Alpha Line;
- Velocity Distribution;
- Astrophysics