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.

引用

页码：355 / +

页数：2

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