Cyclotron line signatures of thermal and magnetic mountains from accreting neutron stars
arXiv:1409.3327 · doi:10.1093/mnras/stu1825
Abstract
Cyclotron resonance scattering features (CRSFs) in the X-ray spectrum of an accreting neutron star are modified differently by accretion mounds sustained by magnetic and thermocompositional gradients. It is shown that one can discriminate, in principle, between mounds of different physical origins by studying how the line energy, width, and depth of a CRSF depend on the orientation of the neutron star, accreted mass, surface temperature distribution, and equation of state. CRSF signatures including gravitational light bending are computed for both phase-resolved and phase-averaged spectra on the basis of self-consistent Grad-Shafranov mound equilibria satisfying a global flux-freezing constraint. The prospects of multimessenger X-ray and gravitational-wave observations with future instruments are canvassed briefly.
arXiv comment17 pages, 12 figures, accepted for publication in MNRAS
References in corpus (57)
- Physics of Strongly Magnetized Neutron Stars
- Evolutionary Binary Sequences for Low- and Intermediate-Mass X-ray Binaries
- Gravitational Radiation and Rotation of Accreting Neutron Stars
- Deformations of Accreting Neutron Star Crusts and Gravitational Wave Emission
- The Breaking Strain of Neutron Star Crust and Gravitational Waves
- Magnetic Fields of Accreting X-Ray Pulsars with the Rossi X-Ray Timing Explorer
- A Debris Disk Around An Isolated Young Neutron Star
- Gravitational Bending of Light Near Compact Objects
- Three-dimensional Simulations of Disk Accretion to an Inclined Dipole: II. Hot Spots and Variability
- The Magnificent Seven: Magnetic fields and surface temperature distributions
- Spectral Formation in Accreting X-Ray Pulsars: Bimodal Variation of the Cyclotron Energy with Luminosity
- Three-dimensional Simulations of Disk Accretion to an Inclined Dipole: I. Magnetospheric Flow at Different Theta
- Modelling magnetically deformed neutron stars
- The Ocean and Crust of a Rapidly Accreting Neutron Star: Implications for Magnetic Field Evolution and Thermonuclear Flashes
- Detecting gravitational wave emission from the known accreting neutron stars
- The Large Observatory for X-ray Timing (LOFT)
- Maximum elastic deformations of relativistic stars
- Propagation of thermonuclear flames on rapidly rotating neutron stars: extreme weather during type I X-ray bursts
- Discovery of a flux-related change of the cyclotron line energy in Her X-1
- The Galactic Population of Low- and Intermediate-Mass X-ray Binaries
- A model for cyclotron resonance scattering features
- Mountains on Neutron Stars: Accreted vs. Non-Accreted crusts
- Gravitational Radiation from an Accreting Millisecond Pulsar with a Magnetically Confined Mountain
- Burial of the polar magnetic field of an accreting neutron star. I. Self-consistent analytic and numerical equilibria
- NuSTAR discovery of a luminosity dependent cyclotron line energy in Vela X-1
- Gravitational Waves: Sources, Detectors and Searches
- Completing the puzzle of the 2004-2005 outburst in V0332+53: the brightening phase included
- Modelling the spin equilibrium of neutron stars in LMXBs without gravitational radiation
- Pulse phase resolved analysis of the HMXB Cen X-3 over two binary orbits
- The variable cyclotron line in GX 301-2
- A Further Study of the Luminosity-Dependent Cyclotron Resonance Energies of the Binary X-ray Pulsar 4U0115+63 with RXTE
- R-modes of accreting hyperon stars as persistent sources of gravitational waves
- A 0535+26 in the August/September 2005 outburst observed by RXTE and INTEGRAL
- Cyclotron Line Features from Near-Critical Fields II: on the Effect of Anisotropic Radiation Fields
- Are neutron stars with crystalline colour superconducting cores interesting for the LIGO experiment?
- Gravitational Waves and the Maximum Spin Frequency of Neutron Stars
- INTEGRAL observations of Her X-1
- Phase dependent view of Cyclotron lines from model accretion mounds on Neutron Stars
- Diamagnetic Screening of the Magnetic Field in Accreting Neutron Stars
- INTEGRAL observations of V0332+53 in outburst
- Burial of the polar magnetic field of an accreting neutron star. II. Hydromagnetic stability of axisymmetric equilibria
- Ballooning Instability in Polar Caps of Accreting Neutron Stars
- Implications of burst oscillations from the slowly rotating accreting pulsar IGR 17480-2446 in the globular cluster Terzan 5
- Gravitational Waves from Fallback Accretion onto Neutron Stars
- Quadrupole moment of a magnetically confined mountain on an accreting neutron star: effect of the equation of state
- MHD instabilities in accretion mounds - II. 3D simulations
- Suzaku observations of the HMXB 1A 1118-61
- Improved estimate of the detectability of gravitational radiation from a magnetically confined mountain on an accreting neutron star
- Three-dimensional stability of magnetically confined mountains on accreting neutron stars
- Sinking of a magnetically confined mountain on an accreting neutron star
- Signature of Temporary Burning Front Stalling from a Non-Photospheric Radius Expansion Double-peaked Burst
- MHD instabilities in accretion mounds - 1: 2D axisymmetric simulations
- Magnetic burial and the harmonic content of millisecond oscillations in thermonuclear X-ray bursts
- Thermonuclear X-ray bursts from the 401 Hertz accreting pulsar IGR J17498-2921: indication of burning in confined regions
- Ignition column depths of helium-rich thermonuclear bursts from 4U 1728-34
- Does the accreting millisecond pulsar XTE J1814-338 precess?
- MHD instabilities in accretion mounds on neutron star binaries
Cited by in corpus (9)
- Gravitational Waves from Neutron Stars: A Review
- The Science of the Einstein Telescope
- Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
- Neutron star deformation due to poloidal-toroidal magnetic fields of arbitrary multipole order: a new analytic approach
- Revisiting field burial by accretion onto neutron stars
- Interpreting the AXP 1E 2259+586 antiglitch as a change in internal magnetization
- Swift/BAT measurements of the cyclotron line energy decay in the accreting neutron star Her X-1: indication of an evolution of the magnetic field?
- Relaxation by thermal conduction of a magnetically confined mountain on an accreting neutron star
- Gravitational waves from neutron-star mountains