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Title:
The identification of Balmer-dominated filaments in RCW 86
Authors:
Long, Knox S.; Blair, William P.
Affiliation:
AA(Johns Hopkins University, Baltimore, MD), AB(Johns Hopkins University, Baltimore, MD)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 358, July 20, 1990, p. L13-L16. Research supported by the Johns Hopkins University. (ApJL Homepage)
Publication Date:
07/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
BALMER SERIES, FORBIDDEN TRANSITIONS, SUPERNOVA REMNANTS, SUPERNOVAE, H ALPHA LINE, INTERSTELLAR MATTER, SHOCK WAVE INTERACTION, VISIBLE SPECTRUM, X RAY SPECTRA
DOI:
10.1086/185768
Bibliographic Code:
1990ApJ...358L..13L

Abstract

Faint optical filaments are identified in the SNR RCW 86. These filaments emit primarily in H-alpha in the wavelength range 6250-7450 A, unlike the brighter radiative filaments that have been reported previously. The new filaments are similar to the nonradiative filaments seen in other SNRs, which are thought to arise from fast shock waves interacting with partially neutral interstellar matter. The H-alpha lines have two components; the widths of the broad components are consistent with a shock speed in RCW 86 of 500-930 km/sec. These shocks have sufficient velocity to produce the X-ray emission observed in RCW 86 and are likely to be associated with the primary blast wave.

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