Discovery of TeV gamma-ray emission from the Cygnus region of the Galaxy

被引：183

作者：

Abdo, A. A. ^{[1
]}

Allen, B.

Berley, D.

Blaufuss, E.

Casanova, S.

Chen, C.

Coyne, D. G.

Delay, R. S.

Dingus, B. L.

Ellsworth, R. W.

Fleysher, L.

Fleysher, R.

Gebauer, I.

Gonzalez, M. M.

Goodman, J. A.

Hays, E.

Hoffman, C. M.

Kolterman, B. E.

Kelley, L. A.

Lansdell, C. P.

Linnemann, J. T.

McEnery, J. E.

Mincer, A. I.

Moskalenko, I. V.

Nemethy, P.

Noyes, D.

Ryan, J. M.

Samuelson, F. W.

Parkinson, P. M. Saz

Schneider, M.

Shoup, A.

Sinnis, G.

Smith, A. J.

Strong, A. W.

Sullivan, G. W.

Vasileiou, V.

Walker, G. P.

Williams, D. A.

Xu, X. W.

Yodh, G. B.

机构：

[1] Michigan State Univ, E Lansing, MI 48824 USA

[2] Univ Calif Irvine, Irvine, CA USA

[3] Univ Maryland, College Pk, MD 20742 USA

[4] Los Alamos Natl Lab, Los Alamos, NM USA

[5] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[6] George Mason Univ, Fairfax, VA 22030 USA

[7] NYU, New York, NY USA

[8] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[9] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico

[10] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[11] Stanford Univ, Stanford, CA 94305 USA

[12] Univ New Hampshire, Durham, NH 03824 USA

[13] Ohio State Univ, Lima, OH 45804 USA

[14] Max Planck Inst Extraterr Phys, D-37075 Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 2007年 / 658卷 / 01期

关键词：

acceleration of particles; cosmic rays; gamma rays : observations; pulsars : individual (G75.2+0.1);

D O I：

10.1086/513696

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The diffuse gamma radiation arising from the interaction of cosmic-ray particles with matter and radiation in the Galaxy is one of the few probes available to study the origin of the cosmic rays. Data from the Milagro gamma-ray observatory - a water Cerenkov detector that continuously views similar to 2 sr of the overhead sky - shows that the brightest extended region in the entire northern sky is the Cygnus region of the Galactic plane. The TeV image of the Cygnus region contains at least one new source, MGRO J2019 + 37, which is 10.9 sigma above the isotropic background, as well as correlations with the matter density in the region. However, the gamma-ray flux from the Cygnus region (after excluding MGRO J2019 + 37) as measured at similar to 12 TeV exceeds that predicted from a model of cosmic-ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or unresolved sources of TeV gamma rays in the region.

引用

页码：L33 / L36

页数：4

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