Gravitational waves from an accreting neutron star with a magnetic mountain
| Autor: | D. J. B. Payne, E. S. Phinney, Andrew Melatos |
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| Přispěvatelé: | Centrella, J. M. |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Gravitational wave Astrophysics::High Energy Astrophysical Phenomena Astronomy Astrophysics Polarization (waves) Accretion (astrophysics) Magnetic field Neutron star Amplitude Quadrupole Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Gravitational redshift |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| Popis: | 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 h_c = 6.3 × 10^(–25)(M_a/10^(–5)M_☉)(ƒ/0.6kHz)^2(d/1kpc)^(–1) for a range of conditions, where ƒ is the wave frequency and d is the distance to the source. This is ~ 10^2 times greater than previous estimates, which failed to treat the mass-flux distribution self-consistently with respect to flux-freezing |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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