Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-02
Astronomy and Astrophysics
Astrophysics
13 pages, 11 figures, accepted for publication in Astronomy & Astrophysics. For the version of the paper with high resolution
Scientific paper
10.1051/0004-6361:20065738
In the framework of the study of the X-ray and optical emission in supernova remnants we focus on an isolated X-ray knot in the northern rim of the Vela SNR (Vela FilD), whose X-ray emission has been studied and discussed in Paper I. We aim at understanding the physical origin of the X-ray and optical emission in FilD, at understanding the role of the different physical processes at work, and at obtaining a key for the interpretation of future X-ray observations of SNRs. To this end we have pursued an accurate ``forward'' modeling of the interaction of the Vela SNR shock with an ISM cloud. We perform hydrodynamic simulations and we directly compare the observables synthesized from the simulations with the data. We explore four different model setups, choosing the values of the physical parameters on the basis of our preliminary analysis of the X-ray data. We synthesize X-ray emission maps and spectra filtered through the XMM-Newton EPIC-MOS instrumental response. The impact of a shock front at 6 million Kelvin on an elliptical cloud 30 times denser than the ambient medium describes well the shock-cloud interaction processes in the Vela FilD region in terms of spectral properties and morphology of the X-ray and optical emission. The bulk of the X-ray emission in the FilD knot originates in the cloud material heated by the transmitted shock front, but significant X-ray emission is also associated to the cloud material, which evaporates, as an effect of thermal conduction, in the intercloud medium. The physical origin of the FilD optical emission is associated to thermal instabilities. In the FilD knot the X-ray emission associated to the reflected shock front is negligible.
Bocchino Fabrizio.
Miceli Marco.
Orlando Salvatore
Reale Fabio
No associations
LandOfFree
Shock-cloud interaction in the Vela SNR II. Hydrodynamic model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Shock-cloud interaction in the Vela SNR II. Hydrodynamic model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shock-cloud interaction in the Vela SNR II. Hydrodynamic model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-265373