Expanding shells in the filamentary edge of the young supernova remnant RCW 103.
Abstract
Long-slit, echelle spectrograms have been obtained of the Hα and [N II] lines over the young supernova remnant RCW 103. One notable velocity feature is a narrow velocity spike (≅20 km s-1 wide) with VHEL ≅ -44 km s-1 which is near the mean for the whole nebula. The overall velocity curves fail to match those expected from a remnant expanding radially at 1100 - 3000 km s-1 as suggested by previous observations. Along the filamentary edge of the SNR several regions of ⪉0.4 pc diameter are found which are expanding with velocities of up to 300 km s-1; these are explained in terms of a model involving bow shocks formed when the supernova blast-wave overruns pre-existing condensations. Other mechanisms are also suggested.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 1986
- DOI:
- 10.1093/mnras/222.3.593
- Bibcode:
- 1986MNRAS.222..593M
- Keywords:
-
- Stellar Envelopes;
- Stellar Evolution;
- Stellar Mass Ejection;
- Stellar Spectrophotometry;
- Supernova Remnants;
- Bow Waves;
- H Alpha Line;
- Shock Waves;
- Velocity Distribution;
- Astrophysics