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Cyclotron harmonics in opacities of isolated neutron star atmospheres

Authors
  • Potekhin, A. Y.
Type
Published Article
Publication Date
Apr 03, 2018
Submission Date
Mar 26, 2010
Identifiers
DOI: 10.1051/0004-6361/201014781
Source
arXiv
License
Yellow
External links

Abstract

Some of X-ray dim isolated neutron stars (XDINS) and central compact objects in supernova remnants (CCO) show absorption features in their thermal soft X-ray spectra. It has been hypothesized that these features could be due to the periodic peaks in free-free absorption opacities, caused by either Landau quantization of electron motion in magnetic fields B<10^{11} G or analogous quantization of ion motion in magnetic fields B>10^{13} G. Here, I review the physics behind cyclotron quantum harmonics in free-free photoabsorption, discuss different approximations for their calculation, and explain why the ion cyclotron harmonics (beyond the fundamental) cannot be observed.

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