محبوبترین نویسندگان :
نویسندگان مقالات پربازدید :
اخترفیزیک و علوم فضایی 2012
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
حوزه های تحت پوشش رویداد
  • جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 937
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     we report xmm-newton observations of the galactic supernova remnant g296.8-0.3, together with complementary radio and infrared data. the spatial and spectral properties of the x-ray emission, detected towards g296.8-0.3, was investigated in order to explore the possible evolutionary scenarios and the physical connexion with its unusual morphology detected at radio frequencies. g296.8-0.3 displays diffuse x-ray emission correlated with the peculiar radio morphology detected in the interior of the remnant and with the shell-like radio structure observed to the northwest side of the object. the x-ray emission peaks in the soft/medium energy range (0.5–3.0 kev). the x-ray spectral analysis confirms that the column density is high (n h∼0.64×1022 cm−2) which supports a distant location (d>9 kpc) for the snr. its x-ray spectrum can be well represented by a thermal (pshock) model, with kt∼0.86 kev, an ionization timescale of 6.1×1010 cm−3 s, and low abundance (∼0.12 z⊙). the 24 μm observations show shell-like emission correlated with part of the northwest and southeast boundaries of the snr. in addition a point-like x-ray source is also detected close to the geometrical center of the radio snr. the object presents some characteristics of the so-called compact central objects (cco). its x-ray spectrum is consistent with those found at other ccos and the value of n h is consistent with that of g296.8-0.3, which suggests a physical connexion with the snr.

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