Six Years of Monitoring of the Sgr B2 Molecular Cloud with INTEGRAL

被引：0
|
作者：
Terrier, R. [1 ]
Belanger, G. [3 ]
Ponti, G. [1 ,2 ]
Trap, G. [1 ,2 ,4 ]
Goldwurm, A. [1 ,2 ,4 ]
Decourchelle, A. [4 ]
机构：
[1] Univ Paris 07, CNRS, Batiment Condorcet, F-75013 Paris, France
[2] Univ Paris 07, CNRS, F-75013 Paris, France
[3] European Space Agency, Madrid 28691, Spain
[4] CEA, F-91191 Gif Sur Yvette, France
来源：
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE | 2009年 / 1126卷
关键词：
Characteristics and properties of the Milky Way galaxy : Galactic center; Astronomical observations: X-rays; GALACTIC-CENTER; X-RAY; SAGITTARIUS B2; VIEW; DISCOVERY; ORIGIN;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Several molecular clouds around the Galactic Centre (GC) emit strong neutral iron fluorescence line at 6.4 keV, as well as hard X-ray emission up to 100 keV. The origin of this emission has long been a matter of controversy: irradiation by low energy cosmic ray electrons or X-rays emitted by a nearby flaring source in the central region. A recent evidence for time variability in the iron line intensity that has been detected in the Sgr 132 cloud favors the reflexion scenario. We present here the data obtained after 6 years of INTEGRAL monitoring of the GC. In particular, we show a lightcurve of Sgr B2 that reveals a decrease in the hard X-ray flux over the last years and discuss its implications. We finally discuss perspectives with Simbol-X.
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页码：355 / +
页数：2
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