Gravitational waves from an accreting neutron star with a magnetic mountain

Details Gravitational waves from an accreting neutron star with a magnetic mountain Gravitational waves from an accreting neutron star with a magnetic mountain

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..686...92p&link_type=abstract

THE ASTROPHYSICS OF GRAVITATIONAL WAVE SOURCES. AIP Conference Proceedings, Volume 686, pp. 92-98 (2003).

Astronomy and Astrophysics

Astrophysics

1

Wave Generation And Sources, Neutron Stars, Accretion And Accretion Disks

Scientific paper

We calculate the amplitude of gravitational waves from a neutron star accreting symmetrically at its magnetic poles. The magnetic field, which is compressed into an equatorial belt during accretion, confines accreted matter in a mountain at the magnetic pole, producing gravitational waves. We compute hydromagnetic equilibria and the corresponding quadrupole moment as a function of the accreted mass, Ma, finding the polarization- and orientation- averaged wave strain at Earth to be hc = 6.3 × 10-25(Ma/10-5Msolar)(f/0.6kHz)2(d/1kpc)-1 for a range of conditions, where f is the wave frequency and d is the distance to the source. This is ~ 102 times greater than previous estimates, which failed to treat the mass-flux distribution self-consistently with respect to flux-freezing.

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