تقرير
Broad-band X-ray spectra of anomalous X-ray pulsars and soft $\gamma$-ray repeaters: pulsars in a weak-accretion regime ?
| العنوان: | Broad-band X-ray spectra of anomalous X-ray pulsars and soft $\gamma$-ray repeaters: pulsars in a weak-accretion regime ? |
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| المؤلفون: | Zezas, A., Trümper, J. E., Kylafis, N. D. |
| سنة النشر: | 2015 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We present the results from the analysis of the broad-band X-ray spectra of 5 Anomalous X-ray Pulsars (AXPs) and Soft $\gamma$-ray Repeaters (SGRs). We fit their Suzaku and INTEGRAL spectra with models appropriate for the X-ray emission from the accretion flow onto a pulsar. We find that their X-ray spectra can be well described with this model. In particular we find that: (a) the radius of the accretion column is $\sim150-350$ m resulting in a transverse optical depth of $\sim 1$; (b) the vertical Thompson optical depth is $\approx 50-400$, and (c) their luminosity translates in accretion rates $\approx10^{15}\rm{g\, s^{-1}}$. These results are in good agreement with the predictions from the fall-back disk model, providing further support in the interpretation of AXPs and SGRs as accreting pulsars. Comment: Accepted for publication in MNRAS, 10 pages, 2 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stv1918 |
| URL الوصول: | http://arxiv.org/abs/1508.04527 |
| رقم الأكسشن: | edsarx.1508.04527 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stv1918 |
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