The origin of the X-ray-emitting plasma in the eastern edge of the Cygnus Loop

Marco Miceli, Yang Chen, Xin Zhou, Fabrizio Bocchino, Salvatore Orlando, Yang Chen, Marco Miceli

Risultato della ricerca: Articlepeer review

8 Citazioni (Scopus)

Abstract

The Cygnus Loop is interacting with a protrusion of the cavity wall in its eastern edge (the XA region), where the X-ray emission is very bright. The complexity of the environment and the non-linear physical processes of the shock–cloud interaction make the origin of the X-ray emission still not well understood. Our purpose is to understand the physical origin of the X-ray emission in the XA region, addressing, in particular, the role of thermal conduction in the interaction process. We analysed two XMM–Newton data sets, performing image analysis and spatially resolved spectral analysis on a set of homogeneous regions. We applied a recently developed diagnostic tool to compare spectral analysis results with predictions of theoretical models, and to estimate the efficiency of thermal conduction on the X-ray-emitting shocked plasma. We found that the inhomogeneous cavity wall contains both large clumps (the protrusion) and small isolated clumps with different densities. A large indentation bent over to the south is detected. The abundance of the surrounding interstellar medium is ∼0.2 times solar value. We confirmed the important role of thermal conduction in the evolution of X-ray-emitting plasma during shock–cloud interaction.
Lingua originaleEnglish
pagine (da-a)223-229
Numero di pagine7
RivistaMonthly Notices of the Royal Astronomical Society
Volume406
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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