Multiple Cyclotron Lines in the Spectrum of 4U 0115+63
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Author/Creator ORCID
Date
2000-04-20
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Citation of Original Publication
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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in W. A. Heindl, W. Coburn, D. E. Gruber, M. Pelling, R. E. Rothschild, J. Wilms, K. Pottschmidt, R. Staubert; Multiple cyclotron lines in the spectrum of 4U 0115+63. AIP Conf. Proc. 12 April 2000; 510 (1): 173–177. https://doi.org/10.1063/1.1303197 and may be found at https://pubs.aip.org/aip/acp/article-abstract/510/1/173/559166/Multiple-cyclotron-lines-in-the-spectrum-of-4U.
Subjects
Abstract
We report phase resolved spectroscopy of the transient accreting pulsar, 4U0115+63. For the first time, more than two cylotron resonance scattering features are detected in the spectrum of an X-ray pulsar. The shape of the fundamental line appears to be complex, and this is in agreement with predictions of Monte-Carlo models. As in other pulsars, the line energies and optical depths are strong functions of pulse phase. One possible model for this is an offset of the dipole of the neutron star magnetic field.