2008ApJ...680..328M -
Astrophys. J., 680, 328-335 (2008/June-2)
Soft X-ray spectroscopy of the Cygnus loop supernova remnant.
McENTAFFER R.L. and CASH W.
Abstract (from CDS):
The Cygnus X-Ray Emission Spectroscopic Survey (CyXESS) sounding rocket payload was launched from White Sands Missile Range on 2006 November 20 and obtained a high-resolution spectrum of the Cygnus Loop supernova remnant in the soft X-ray. The novel X-ray spectrograph incorporated a wire-grid collimator feeding an array of gratings in the extreme off-plane mount that ultimately dispersed the spectrum onto gaseous electron multiplier (GEM) detectors. This instrument recorded 65 s of usable data between 43 and 49.5 Å in two prominent features. The first feature near 45 Å is dominated by the He-like triplet of O VII in second order with contributions from Mg X and Si IX-Si XII in first order, while the second feature near 47.5 Å is first-order S IX and S X. Fits to the spectra give an equilibrium plasma at log(T)=6.2 (kTe=0.14 keV) and near cosmic abundances. This is consistent with previous observations, which demonstrated that the soft X-ray emission from the Cygnus Loop is dominated by interactions between the initial blast wave and the walls of a precursor-formed cavity surrounding the Cygnus Loop and that this interaction can be described using equilibrium conditions.
Abstract Copyright:
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Journal keyword(s):
Instrumentation: Spectrographs - ISM: Individual: Name: Cygnus Loop - Line: Identification - ISM: Supernova Remnants - X-rays: individual (Cygnus Loop)
Simbad objects:
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