Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...296..201s&link_type=abstract
Astronomy and Astrophysics, v.296, p.201
Astronomy and Astrophysics
Astrophysics
5
Ism: Cygnus Loop, X-Rays: Ism, Ism: Kinematics And Dynamics, Ism: Supernova Remnants
Scientific paper
We present coronal iron line observations of the Cygnus Loop Supernova Remnant (SNR). We describe and analyse the measurements obtained with the new Fabry-Perot spectrophotometer, E.S.O.P., in the [FeX] and [FeXIV] coronal lines. The spectral capability of the instrument allows to study the kinematics of the 10^6^K hot gas. We extensively observed the north X-ray irregularity of the Cygnus Loop, which appears as a large V with a central extended condensation located roughly at (α_1950_=~20h48min, δ_1950_=~32deg00'). These results are the first measurements of the X-ray gas velocity along the observed V-shaped feature: the east arm is associated with red shifted gas while the west arm is blue shifted. This structure can thus be simply interpreted as a projection effect without involving a bow shock or intersecting shocks.
Decourchelle Anne
Sauvageot Jean-Luc
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