Magnetically confined mountains on accreting neutron stars with multipole magnetic fields
arXiv:2209.04352 · doi:10.1093/mnras/stac2585
Abstract
Magnetically confined mountains on accreting neutron stars are candidates for producing continuous gravitational waves. We formulate a magnetically confined mountain on a neutron star with strong multipole magnetic fields and obtain some sequences of numerical solutions. We find that the mass ellipticity of the mountain increases by one order of magnitude if the neutron star has strong multipole magnetic fields. As matter accretes on to the magnetic pole, the size of the mountain increases and the magnetic fields are buried. If the neutron star has a dipole magnetic field, the dipole magnetic field is buried and transformed into multipole components. By contrast, if the neutron star has both dipole and strong multipole magnetic fields, the multipole magnetic fields are buried and transformed into a negative dipole component. We also calculate magnetically confined mountains with toroidal magnetic fields and find that the ellipticity becomes slightly smaller when the mountain has toroidal magnetic fields. If the multipole magnetic fields are buried, they sustain the intense toroidal magnetic field near the stellar surface, and the ratio of the toroidal magnetic field to the poloidal magnetic field is close to 100. The hidden strong toroidal magnetic fields are sustained by the buried multipole magnetic fields.
13 pages, 12 figures, accepted for publication in MNRAS
References in corpus (27)
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
- Modelling magnetically deformed neutron stars
- Mountains on Neutron Stars: Accreted vs. Non-Accreted crusts
- All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
- A NICER view of PSR J0030+0451: evidence for a global-scale multipolar magnetic field
- Evolution of a buried magnetic field in the central compact object neutron stars
- CCOs and the hidden magnetic field scenario
- Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
- Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO--Virgo data
- All-sky Search for Continuous Gravitational Waves from Isolated Neutron Stars in the Early O3 LIGO Data
- First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
- Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data
- Burial of the polar magnetic field of an accreting neutron star. II. Hydromagnetic stability of axisymmetric equilibria
- A directed search for gravitational waves from Scorpius X-1 with initial LIGO
- Neutron star deformation due to poloidal-toroidal magnetic fields of arbitrary multipole order: a new analytic approach
- Modelling neutron star mountains in relativity
- Resistive relaxation of a magnetically confined mountain on an accreting neutron star
- Axisymmetric and stationary structures of magnetized barotropic stars with extremely strong magnetic fields deep inside
- Search of the Early O3 LIGO Data for Continuous Gravitational Waves from the Cassiopeia A and Vela Jr. Supernova Remnants
- Three-dimensional stability of magnetically confined mountains on accreting neutron stars
- All-sky, all-frequency directional search for persistent gravitational-waves from Advanced LIGO's and Advanced Virgo's first three observing runs
- MHD instabilities in accretion mounds - 1: 2D axisymmetric simulations
- Revisiting field burial by accretion onto neutron stars
- A necessary condition for supernova fallback invading newborn neutron-star magnetosphere
- Relaxation by thermal conduction of a magnetically confined mountain on an accreting neutron star
Cited by in corpus (6)
- The Science of the Einstein Telescope
- Search for continuous gravitational waves from known pulsars in the first part of the fourth LIGO-Virgo-KAGRA observing run
- Gravitational waves from neutron-star mountains
- Does the gamma-ray binary LS I +61°303 harbor a magnetar?
- Magnetically Confined Mountains on Accreting Neutron Stars in General Relativity
- Continuous gravitational waves from thermal mountains on accreting neutron stars: effect of the nuclear pasta phase