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High resolution spectroscopy of Balmer-dominated shocks in the RCW 86, Kepler and SN 1006 supernova remnants
Stockholm University, Faculty of Science, Department of Astronomy.
Stockholm University, Faculty of Science, Department of Astronomy.
2003 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 407, 249-257 p.Article in journal (Refereed) Published
Abstract [en]

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 Hα 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-1, 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-1). The narrow component Hα and Hβ lines in this remnant have a FWHM of merely 21 km s-1. 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. Based on observations collected at the European Southern Observatory, Paranal, Chile (ESO Programme 67.D-0579).

Place, publisher, year, edition, pages
2003. Vol. 407, 249-257 p.
Keyword [en]
ISM: supernova remnants, shock waves, ISM: individual objects: SN 1006, ISM: individual objects: RCW 86, ISM: individual objects: Kepler
Research subject
Astronomy
Identifiers
URN: urn:nbn:se:su:diva-30973DOI: 10.1051/0004-6361:20030839OAI: oai:DiVA.org:su-30973DiVA: diva2:276797
Available from: 2009-11-12 Created: 2009-11-01 Last updated: 2017-12-12Bibliographically approved

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