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Título:
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Search for very high energy gamma radiation from the radio bright region DR4 of the SNR G78.2+2.1
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Autores:
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Arqueros Martínez, Fernando ;
Cortina, J. ;
Fernández, J. ;
Fonseca González, Mª Victoria ;
González, J. G. ;
Martínez, S. ;
Mirzoyan, R. ;
Moralejo, A. ;
Padilla, L. ;
Sánchez, J. A.
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Tipo de documento:
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texto impreso
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Editorial:
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EDP Sciencies, 1996-10
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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Data from the HEGRA air shower array are used to set an upper limit on the emission of gamma-radiation above 25 (18) TeV from the direction of the radio bright region DR4 within the SNR G78.2 + 2.1 of 2.5 (7.1). 10^-13 cm^-2 sec^-1. The shock front of SNR G78.2 + 2.1 probably recently overtook the molecular cloud Gong 8 which then acts as a target for the cosmic rays produced within the SNR, thus leading to the expectation of enhanced gamma-radiation. Using a model of Drury, Aharonian and Völk which assumes that SNRs are the sources of galactic cosmic rays via first order Fermi acceleration, we calculated a theoretical prediction for the gamma-ray flux from the DR4 region and compared it with our experimental flux limit. Our 'best estimate' value for the predicted flux lies a factor of about 18 above the upper limit for gamma-ray energies above 25 TeV. Possible reasons for this discrepancy are discussed.
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En línea:
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https://eprints.ucm.es/38102/1/FS%C3%A1nchez%20P%2001%20LIBRE.pdf
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