2006/09/15 by B. Haskell, D. I. Jones, Nils Andersson +1 · 2 citations
Physics and Astronomy · #Astrobiology #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Gamma-ray bursts and supernovae #Neutron star #Physics #Pulsars and Gravitational Waves Research #Stars #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2006.10998.x
published as Mon.Not.Roy.Astron.Soc.373:1423-1439,2006 · Accepted by MNRAS
arxiv created 2006/09/15 · openalex publication_date 2006/11/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The aim of this paper is to compare the two cases of an isolated neutron star, with a non-accreted crust, and that of an accreting neutron star, with an accreted crust, and try to estimate which one of the two would make a better source of gravitational waves. In order to do this, we must evaluate the maximum 'mountain' that the crust can sustain in these two cases. We first do this using the formalism of Ushomirsky, Cutler & Bildsten and find that the maximum quadrupole is very similar in the two cases, with the non-accreted crust sustaining a slightly larger mountain. We then develop a perturbation formalism for the problem, that allows us to drop the Cowling approximation and have more control over the boundaries. The use of this formalism confirms that there is not much difference between the two cases, but leads to results approximately one order of magnitude larger than those we obtain with the formalism of Ushomirsky et al.