تقرير
A Seyfert-2-like Spectrum in the High-Mass X-ray Binary Microquasar V4641 Sgr
| العنوان: | A Seyfert-2-like Spectrum in the High-Mass X-ray Binary Microquasar V4641 Sgr |
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| المؤلفون: | Morningstar, W. R., Miller, J. M., Reynolds, M. T., Maitra, D. |
| سنة النشر: | 2014 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We present an analysis of three archival Chandra observations of the black hole V4641 Sgr, performed during a decline into quiescence. The last two observations in the sequence can be modeled with a simple power-law. The first spectrum, however, is remarkably similar to spectra observed in Seyfert-2 active galactic nuclei, which arise through a combination of obscuration and reflection from distant material. This spectrum of V4641 Sgr can be fit extremely well with a model including partial-covering absorption and distant reflection. This model recovers a Gamma = 2 power-law incident spectrum, typical of black holes at low Eddington fractions. The implied geometry is plausible in a high-mass X-ray binary like V4641 Sgr, and may be as compelling as explanations invoking Doppler-split line pairs in a jet, and/or unusual Comptonization. We discuss potential implications and means of testing these models. Comment: Accepted for publication in ApJ Letters |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/2041-8205/786/2/L20 |
| URL الوصول: | http://arxiv.org/abs/1402.6665 |
| رقم الأكسشن: | edsarx.1402.6665 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/2041-8205/786/2/L20 |
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