تقرير
The 3 Ms Chandra Campaign on Sgr A*: A Census of X-ray Flaring Activity from the Galactic Center
| العنوان: | The 3 Ms Chandra Campaign on Sgr A*: A Census of X-ray Flaring Activity from the Galactic Center |
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| المؤلفون: | Neilsen, J., Nowak, M. A., Gammie, C., Dexter, J., Markoff, S., Haggard, D., Nayakshin, S., Wang, Q. D., Grosso, N., Porquet, D., Tomsick, J. A., Degenaar, N., Fragile, P. C., Houck, J. C., Wijnands, R., Miller, J. M., Baganoff, F. K. |
| سنة النشر: | 2013 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies |
| الوصف: | Over the last decade, X-ray observations of Sgr A* have revealed a black hole in a deep sleep, punctuated roughly once per day by brief flares. The extreme X-ray faintness of this supermassive black hole has been a long-standing puzzle in black hole accretion. To study the accretion processes in the Galactic Center, Chandra (in concert with numerous ground- and space-based observatories) undertook a 3 Ms campaign on Sgr A* in 2012. With its excellent observing cadence, sensitivity, and spectral resolution, this Chandra X-ray Visionary Project (XVP) provides an unprecedented opportunity to study the behavior of the closest supermassive black hole. We present a progress report from our ongoing study of X-ray flares, including the brightest flare ever seen from Sgr A*. Focusing on the statistics of the flares and the quiescent emission, we discuss the physical implications of X-ray variability in the Galactic Center. Comment: Proceedings of IAU Symposium No. 303, The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1017/S1743921314000945 |
| URL الوصول: | http://arxiv.org/abs/1311.6818 |
| رقم الأكسشن: | edsarx.1311.6818 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1017/S1743921314000945 |
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