Discovery of TeV gamma-ray emission from the cygnus region of the galaxy
Por:
Abdu A.A., 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., Huffman 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., 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.
Publicada:
1 ene 2007
Resumen:
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 ?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 ? 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 ?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. © 2007. The American Astronomical Society. All rights reserved.
Filiaciones:
Abdu A.A.:
Michigan State University, East Lansing, MI, United States
Allen B.:
University of California, Irvine, CA, United States
Berley D.:
University of Maryland, College Park, MD, United States
Blaufuss E.:
University of Maryland, College Park, MD, United States
Casanova S.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Chen C.:
University of California, Irvine, CA, United States
Coyne D.G.:
University of California, Santa Cruz, CA, United States
Delay R.S.:
University of California, Irvine, CA, United States
Dingus B.L.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Ellsworth R.W.:
George Mason University, Fairfax, VA, United States
Fleysher L.:
New York University, New York, NY, United States
Fleysher R.:
New York University, New York, NY, United States
Gebauer I.:
Michigan State University, East Lansing, MI, United States
Universität Karlsruhe, Insitute für Experimentelle Kernphysik, Karlsruhe, Germany
Gonzalez M.M.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, DF, Mexico
Goodman J.A.:
University of Maryland, College Park, MD, United States
Hays E.:
University of Maryland, College Park, MD, United States
Huffman C.M.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Kolterman B.E.:
New York University, New York, NY, United States
Kelley L.A.:
University of California, Santa Cruz, CA, United States
Lansdell C.P.:
University of Maryland, College Park, MD, United States
Linnemann J.T.:
Michigan State University, East Lansing, MI, United States
Mcenery J.E.:
NASA Goddard Space Flight Center, Greenbelt, MD, United States
Mincer A.I.:
New York University, New York, NY, United States
Moskalenko I.V.:
Stanford University, Stanford, CA, United States
Nemethy P.:
New York University, New York, NY, United States
Noyes D.:
University of Maryland, College Park, MD, United States
Ryan J.M.:
University of New Hampshire, Durham, NH, United States
Samuelson F.W.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Saz Parkinson P.M.:
University of California, Santa Cruz, CA, United States
Schneider M.:
University of California, Santa Cruz, CA, United States
Shoup A.:
Ohio State University, Lima, OH, United States
Sinnis G.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Smith A.J.:
University of Maryland, College Park, MD, United States
Strong A.W.:
Max-Planck-lnstitut für Extraterrestrische Physik, Garching, Germany
Sullivan G.W.:
University of Maryland, College Park, MD, United States
Vasileiou V.:
University of Maryland, College Park, MD, United States
Walker G.P.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Williams D.A.:
University of California, Santa Cruz, CA, United States
Xu X.W.:
Los Alamos National Laboratory, Los Alamos, NM, United States
Yodh G.B.:
University of California, Irvine, CA, United States
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