Search for a galactic 1275 KeV line emission with SPI/INTEGRAL

被引：0

作者：

Jean, P ^{[1
]}

Knödlseder, J ^{[1
]}

Hernanz, M ^{[1
]}

Cisana, E ^{[1
]}

Valsesia, M ^{[1
]}

von Kienlin, A ^{[1
]}

Leleux, P ^{[1
]}

Strong, A ^{[1
]}

Winkler, C ^{[1
]}

Wunderer, C ^{[1
]}

机构：

[1] CNRS, UPS, CESR, Toulouse, France

来源：

PROCEEDINGS OF THE 5TH INTEGRAL WORKSHOP ON THE INTEGRAL UNIVERSE | 2004年 / 552卷

关键词：

gamma-ray astronomy; nuclear astrophysics; gamma-ray spectroscopy; novae;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The 1275 keV line is emitted by radioactive Na-22 nuclei which are supposed to be ejected in the interstellar medium by ONe type novae. A "diffuse" 1275 keV line emission, induced by the cumulative contribution of ONe novae, is expected from the Galactic center region. So far, this emission has not, been detected by gamma-ray telescopes. In 2003, the central region of our Galaxy has been observed by INTEGRA L during the, Galactic Center Deep Exposure. We analysed the, SPI data in order to search for the Galactic 1275 keV line emission and derive upper limits to the Na-22 mass produced per outburst ranging from 2.5 to 5.7 x 10(-7) M-circle dot depending on the rate and spatial distribution of novae.

引用

页码：119 / 122

页数：4

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