XMM-Newton X-ray spectra of the SNR 0509-67.5: data and modelsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We report on X-ray observations of the supernova remnant 0509-67.5
in the Large Magellanic Cloud acquired by the XMM-Newton X-ray
observatory. We use the imaging spectroscopy (EPIC) and Reflective
Grating Spectrometer (RGS) data to investigate properties of the remnant
and its environment.
The X-ray spectra were analyzed with SPEX software package. In addition, we performed a numerical
hydrodynamic simulation of the remnant.
The EPIC data show prominent Fe K line emission, but the deduced overall amount of
iron in the shocked ejecta is low. The data also show that the remnant
has an asymmetric ejecta structure: the bright southwest region of the
remnant shows an overabundance of metals. The analysis of the RGS
spectrum shows that the remnant has a high line velocity broadening of
5000 km s$^{-1}$. We developed a hydrodynamical model for the
remnant with basic hydrodynamical and spectral parameters that are
similar to those observed.
The data analysis indicates that the reverse shock just recently reached iron layers of
the ejecta. The brightness enhancement in the southwest region could be
a sign of an asymmetric explosion or it could be the result of a density
enhancement in the interstellar medium. We constructed numerical models
that are in good agreement with the observations, with circumstellar
density of 3{\times}10$^{-25}$ g/cm\^{}3, age of \~{}400 years,
velocities of \~{}5000 km s$^{-1}$, and an electron-to-ion
temperature ratio of 10$^{-2}$.