Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-10
Astron.Astrophys. 407 (2003) 249-258
Astronomy and Astrophysics
Astrophysics
Accepted by A&A
Scientific paper
10.1051/0004-6361:20030839
We report results from high resolution optical spectroscopy of three non-radiative galactic supernova remnants, RCW 86, Kepler's supernova remnant and SN 1006. We have measured the narrow component H-alpha line widths in Balmer-dominated filaments in RCW 86 and SN 1006, as well as the narrow component width in a Balmer-dominated knot in Kepler's SNR. The narrow component line widths measured in RCW 86 and Kepler's SNR show FWHM of 30-40 km/s, similar to what has been seen in other Balmer-dominated remnants. Of the remnants in our sample, SN 1006 is the fastest shock (~3000 km/s). The narrow component H-alpha and H-beta lines in this remnant have a FWHM of merely 21 km/s. Comparing the narrow component widths measured in our sample with those measured in other remnants shows that the width of the narrow component does not correlate in a simple way with the shock velocity. The implications for the pre-heating mechanism responsible for the observed line widths are discussed.
Ghavamian Parviz
Lundqvist Peter
Smith Christopher R.
Sollerman Jesper
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