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
Book Volume: 749
Journal Issue: 2
DOI: 10.1088/2041-8205/749/2/L35
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.
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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