Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335l..71f&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. L71-L74. DOE-sponsored research.
Astronomy and Astrophysics
Astrophysics
142
Absorption Spectra, Astronomical Spectroscopy, Gamma Ray Bursts, Neutron Stars, Harmonic Generations, Line Spectra, Polar Regions, Spectral Line Width
Scientific paper
The discovery reported by Mazets et al. in 1981 of single absorption lines at about 40 keV in the spectra of gamma-ray bursts observed by the Konus instrument implies magnetic fields ≡1012G and, hence, that the bursts occur on highly magnetized neutron stars. The authors report the detailed analysis of a burst (GB 880205) with double line features observed by the Ginga satellite. It is concluded that these lines are most reasonably interpreted as the first and second cyclotron harmonics in a magnetic field of ≡1.7×1012G with an electron column density of ≡3.6×1022cm-2. The narrowness of the absorption lines requires that they originate in a very cold, small area on the neutron star, probably distinct from the gamma-ray emitting region.
Conner J. P.
Epstein Irving R.
Fenimore Edward E.
Fujii Masaaki
Hayashida Kiyoshi
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