Kinematics of the 10^6^K gas derived from coronal iron lines in the Cygnus Loop supernova remnant.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1995
- Bibcode:
- 1995A&A...296..201S
- Keywords:
-
- ISM: CYGNUS LOOP;
- X-RAYS: ISM;
- ISM: KINEMATICS AND DYNAMICS;
- ISM: SUPERNOVA REMNANTS