Gravitational excitation of high frequency QPOs
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Publication:3614078
DOI10.1051/0004-6361:20077061zbMATH Open1156.85313arXiv0808.3641OpenAlexW2135649101WikidataQ68857853 ScholiaQ68857853MaRDI QIDQ3614078
Author name not available (Why is that?)
Publication date: 16 March 2009
Published in: (Search for Journal in Brave)
Abstract: We discuss the possibility that high-frequency QPOs in neutron-star binary systems may result from forced resonant oscillations of matter in the innermost parts of the accretion disc, excited by gravitational perturbations coming from asymmetries of the neutron star or from the companion star. We find that neutron-star asymmetries could, in principle, be effective for inducing both radial and vertical oscillations of relevant amplitude while the binary companion might possibly produce significant radial oscillations but not vertical ones. Misaligned neutron-star quadrupole moments of a size advocated elsewhere for explaining limiting neutron star periods could be large enough also for the present purpose.
Full work available at URL: https://arxiv.org/abs/0808.3641
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