Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982cha%26a...6...28q&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 6, Issue 1, p. 28-32.
Astronomy and Astrophysics
Astrophysics
Scientific paper
We discuss the time profiles and the energy spectra of the γ-ray burst event of 1979 March 5. We find: (1) the energy spectrum in the burst phase (< 0s, 3) can be fitted by a thermal bremsstrahlung with kT ≅ 50KeV, plus a bremsstrahlung of relativistic electrons with equivalent Lorentz factor γ = 3.3 and a broad line at 430KeV. (2) The average spectrum in the pulsating phase can be fitted with a bremsstrahlung of thermal electrons with kT ≅ 40KeV. (3) The time profile in the pulsating phase can be fitted by the bremsstrahlung of a radiative region which is cooling in time. Accordingly, we propose the following morphological model: somehow a large amount of matter is suddenly injected onto the surface of a neutron star at its magnetic poles. The gravitational energy of the electrons is transformed into radiation during the burst phase through the bremsstrahlung of the electrons. The gravitational energy of the protons is first transformed into heat in a radiative region, which then radiates during the pulsating phase by the bremsstrahlung of the thermal electrons.
Li Ze-Qing
Qu Qin-Yue
Wang De-yu
Xu Ao-Ao
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