Shock-cloud interaction in the Vela SNR. II. Hydrodynamic model

Fabio Reale, Marco Miceli, Fabio Reale, Orlando, Miceli, Bocchino

Risultato della ricerca: Article

14 Citazioni (Scopus)

Abstract

Context: .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. Aims: .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. Methods: .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. Results: .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. Conclusions: .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.
Lingua originaleEnglish
pagine (da-a)213-223
Numero di pagine11
RivistaASTRONOMY & ASTROPHYSICS
Volume458
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

Shock-cloud interaction in the Vela SNR. II. Hydrodynamic model. / Reale, Fabio; Miceli, Marco; Reale, Fabio; Orlando; Miceli; Bocchino.

In: ASTRONOMY & ASTROPHYSICS, Vol. 458, 2006, pag. 213-223.

Risultato della ricerca: Article

Reale, F, Miceli, M, Reale, F, Orlando, Miceli & Bocchino 2006, 'Shock-cloud interaction in the Vela SNR. II. Hydrodynamic model', ASTRONOMY & ASTROPHYSICS, vol. 458, pagg. 213-223.
Reale, Fabio ; Miceli, Marco ; Reale, Fabio ; Orlando ; Miceli ; Bocchino. / Shock-cloud interaction in the Vela SNR. II. Hydrodynamic model. In: ASTRONOMY & ASTROPHYSICS. 2006 ; Vol. 458. pagg. 213-223.
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abstract = "Context: .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. Aims: .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. Methods: .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. Results: .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. Conclusions: .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.",
keywords = "HydrodynamicsISM; cloudsISM; individual objects; Vela SNRISM; kinematics and dynamicsISM; supernova remnants; Shock waves",
author = "Fabio Reale and Marco Miceli and Fabio Reale and Orlando and Miceli and Bocchino",
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T1 - Shock-cloud interaction in the Vela SNR. II. Hydrodynamic model

AU - Reale, Fabio

AU - Miceli, Marco

AU - Reale, Fabio

AU - Orlando, null

AU - Miceli, null

AU - Bocchino, null

PY - 2006

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N2 - Context: .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. Aims: .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. Methods: .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. Results: .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. Conclusions: .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.

AB - Context: .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. Aims: .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. Methods: .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. Results: .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. Conclusions: .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.

KW - HydrodynamicsISM; cloudsISM; individual objects; Vela SNRISM; kinematics and dynamicsISM; supernova remnants; Shock waves

UR - http://hdl.handle.net/10447/1841

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JO - Astronomy and Astrophysics

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