Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy

Abado, A. A.; Allen, B. T.; Berley, D.; Blaufuss, E.; Casanova, S.; Chen, C.; Coyne, D.; 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.; Landsdell, C. P.; Linnemann J. T., J. T.; McEnery, J. E.; Mincer, A. I.; Moskalenko, I.; Nemethy, P.; Noyes, D.; Ryan, J. M.; Samuelson, F. W.; Saz Parkinson, P. M.; 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.

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Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy

Abado, A. A., Allen, B. T., Berley, D., Blaufuss, E., Casanova, S., Chen, C., et al. (2007). Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy. Astrophysical Journal, Letters, 658(Number 1, Part 2), L33-L36.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-7DA4-1 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-7DA5-0

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Abado, A. A.¹, Author
Allen, B. T.¹, Author
Berley, D.¹, Author
Blaufuss, E.¹, Author
Casanova, S.², Author
Chen, C.¹, Author
Coyne, D.¹, Author
Delay, R. S.¹, Author
Dingus, B. L.¹, Author
Ellsworth, R. W.¹, Author
Fleysher, L.¹, Author
Fleysher, R.¹, Author
Gebauer, I.¹, Author
Gonzalez, M. M.¹, Author
Goodman, J. A.¹, Author
Hays, E.¹, Author
Hoffman, C. M.¹, Author
Kolterman, B. E.¹, Author
Kelley, L. A.¹, Author
Landsdell, C. P.¹, Author
Linnemann J. T., J. T.¹, AuthorMcEnery, J. E.¹, AuthorMincer, A. I.¹, AuthorMoskalenko, I.¹, AuthorNemethy, P.¹, AuthorNoyes, D.¹, AuthorRyan, J. M.¹, AuthorSamuelson, F. W.¹, AuthorSaz Parkinson, P. M.¹, AuthorSchneider, M.¹, AuthorShoup, A.¹, AuthorSinnis, G.¹, AuthorSmith, A. J.¹, AuthorStrong, A. W.¹, AuthorSullivan, G. W.¹, AuthorVasileiou, V.¹, AuthorWalker, G. P.¹, AuthorWilliams, D. A.¹, AuthorXu, X. W.¹, AuthorYodh, G. B.¹, Author more..

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1Department of Physics and Astronomy, Michigan State, USA University, 3245 BioMedical Physical Sciences Building, East Lansing, MI 48824, USA Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA Department of Physics, University of Maryland, College Park, MD 20742, USA Group P-23, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA Department of Physics and Astronomy, George Mason University, 4400 University Drive, Fairfax, VA 22030, USA Instituto de Astronomía, Universidad Nacional Autónoma de México, D.F., México, 04510, Mexico High Energy Physics Division, Argonne National Laboratory, Argonne, IL 60439 and Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA Department of Physics, New York University, 4 Washington Place, New York, NY 10003, USA NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Department of Physics, University of New Hampshire, Morse Hall, Durham, NH 03824-3525, USA Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, USA Santa Cruz Institute for Particle Physics, University of California, 1156 High Street, Santa Cruz, CA 95064 Ohio State University, Lima, OH 45804, USA, ou_persistent22
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550

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Abstract: 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. Milagro is a water Cherenkov detector that continuously views the entire overhead sky. The large field-of-view combined with the long observation time makes Milagro the most sensitive instrument available for the study of large, low surface brightness sources such as the diffuse gamma radiation arising from interactions of cosmic radiation with interstellar matter. In this paper we present spatial and flux measurements of TeV gamma-ray emission from the Cygnus Region. The TeV image shows at least one new source MGRO J2019+37 as well as correlations with the matter density in the region as would be expected from cosmic-ray proton interactions. However, the TeV gamma-ray flux as measured at ~12 TeV from the Cygnus region (after excluding MGRO J2019+37) exceeds that predicted from a conventional model of cosmic ray production and propagation. This observation indicates the existence of either hard-spectrum cosmic-ray sources and/or other sources of TeV gamma rays in the region.

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Language(s): eng - English

Dates: Date issued: 2007-03-20

Publication Status: Issued

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Identifiers: eDoc: 318245

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Title: Astrophysical Journal, Letters

Alternative Title : ApJL

Source Genre: Journal

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Pages: - Volume / Issue: 658 (Number 1, Part 2) Sequence Number: - Start / End Page: L33 - L36 Identifier: -