FERMI LARGE AREA TELESCOPE DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE VICINITY OF SNR W44
Uchiyama Y, Funk S, Katagiri H, Katsuta J, Lemoine-Goumard M, Tajima H, Tanaka T, Torres DF (2012)
Publication Type: Journal article
Publication year: 2012
Journal
Book Volume: 749
Journal Issue: 2
DOI: 10.1088/2041-8205/749/2/L35
Abstract
We report the detection of GeV gamma-ray emission from the molecular cloud complex that surrounds the supernova remnant (SNR) W44 using the Large Area Telescope on board Fermi. While the previously reported gamma-ray emission from SNR W44 is likely to arise from the dense radio-emitting filaments within the remnant, the gamma-ray emission that appears to come from the surrounding molecular cloud complex can be ascribed to the cosmic rays (CRs) that have escaped from W44. The non-detection of synchrotron radio emission associated with the molecular cloud complex suggests the decay of pi(0) mesons produced in hadronic collisions as the gamma-ray emission mechanism. The total kinetic energy channeled into the escaping CRs is estimated to be W-esc similar to (0.3-3) x 10(50) erg, in broad agreement with the conjecture that SNRs are the main sources of Galactic CRs.
Authors with CRIS profile
Involved external institutions
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
Ibaraki University / 茨城大学
Japan (JP)
Université Bordeaux 1, Sciences et Technologies
France (FR)
Stanford University
United States (USA) (US)
Institut de Ciències de l'Espai (ICE)
Spain (ES)
United States (USA) (US)
Ibaraki University / 茨城大学
Japan (JP)
Université Bordeaux 1, Sciences et Technologies
France (FR)
Stanford University
United States (USA) (US)
Institut de Ciències de l'Espai (ICE)
Spain (ES)
How to cite
APA:
Uchiyama, Y., Funk, S., Katagiri, H., Katsuta, J., Lemoine-Goumard, M., Tajima, H.,... Torres, D.F. (2012). FERMI LARGE AREA TELESCOPE DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE VICINITY OF SNR W44. Astrophysical Journal Letters, 749(2). https://doi.org/10.1088/2041-8205/749/2/L35
MLA:
Uchiyama, Yasunobu, et al. "FERMI LARGE AREA TELESCOPE DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE VICINITY OF SNR W44." Astrophysical Journal Letters 749.2 (2012).
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