Dissecting the Cygnus region with TeV gamma rays and neutrinos

被引：42

作者：

Beacom, John F. ^{[1
]}

Kistler, Matthew D.

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[3] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.75.083001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent Milagro observations of the Cygnus region have revealed both diffuse TeV gamma-ray emission and a bright and extended TeV source, MGRO J2019+37, which seems to lack an obvious counterpart at other wavelengths. Additional study of this curious object also promises to provide important clues concerning one of the Milky Way's most active environments. We point out some of the principal facts involved by following three modes of attack. First, to gain insight into this mysterious source, we consider its relation to known objects in both the Cygnus region and the rest of the Galaxy. Second, we find that a simple hadronic model can easily accommodate Milagro's flux measurement (which is at a single energy), as well as other existing observations spanning nearly 7 orders of magnitude in gamma-ray energy. Third, since a hadronic gamma-ray spectrum necessitates an accompanying TeV neutrino flux, we show that IceCube observations may provide the first direct evidence of a Galactic cosmic-ray accelerator.

引用

页数：7

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