M51 ULX-7: super-orbital periodicity and constraints on the neutron star magnetic field
arXiv:1911.09670 · doi:10.1093/mnras/stz3298
Abstract
In the current work we explore the applicability of standard theoretical models of accretion to the observed properties of M51 ULX-7. The spin-up rate and observed X-ray luminosity are evidence of a neutron star with a surface magnetic field of G, rotating near equilibrium. Analysis of the X-ray light-curve of the system (Swift/XRT data) reveals the presence of a 39 d super-orbital period. We argue that the super-orbital periodicity is due to disc precession, and that material is accreted onto the neutron star at a constant rate throughout it. Moreover, by attributing this modulation to the free precession of the neutron star we estimate a surface magnetic field strength of G. The agreement of these two independent estimates provide strong constraints on the surface polar magnetic field strength of the neutron star.
arXiv comment11 pages, 6 figures, accepted for publication in MNRAS
References in corpus (73)
- The Swift X-ray Telescope
- Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
- Understanding the Lomb-Scargle Periodogram
- An online repository of Swift/XRT light curves of GRBs
- An Ultraluminous X-ray Source Powered by An Accreting Neutron Star
- Super-critically accreting stellar-mass black holes as ultraluminous X-ray sources
- An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
- Bayesian Estimation of Hardness Ratios: Modeling and Computations
- Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
- Thermal and Bulk Comptonization in Accretion-Powered X-Ray Pulsars
- Discovery of pulsations from NGC 300 ULX1 and its fast period evolution
- Resolved atomic lines reveal outflows in two ultraluminous X-ray sources
- Precessing warped accretion discs in X-ray binaries
- On the maximum accretion luminosity of magnetized neutron stars: connecting X-ray pulsars and ultraluminous X-ray sources
- Warped accretion discs and the long periods in X-ray binaries
- A spectral-timing model for ULXs in the super-critical regime
- Origin of the Soft Excess in X-ray Pulsars
- Magnetic fields in axisymmetric neutron stars
- Using Neutron Star Observations to Determine Crust Thicknesses, Moments of Inertia, and Tidal Deformabilities
- The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2
- Freely precessing neutron stars: Model and observations
- Magnetically Driven Warping, Precession and Resonances in Accretion Disks
- Propeller effect in action in the ultraluminous accreting magnetar M82 X-2
- Evidence for Pulsar-like Emission Components in the Broadband ULX Sample
- Accretion Onto Fast X-Ray Pulsars
- Evidence for a Variable Ultrafast Outflow in the Newly Discovered Ultraluminous Pulsar NGC 300 ULX-1
- From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link
- A rapidly-changing jet orientation in the stellar-mass black hole V404 Cygni
- Torque Enhancement, Spin Equilibrium, and Jet Power from Disk-Induced Opening of Pulsar Magnetic Fields
- Supercritical Accretion Discs in Ultraluminous X-ray Sources and SS 433
- Pulsing ULXs: tip of the iceberg?
- Optically thick envelopes around ULXs powered by accreating neutron stars
- ULX spectra revisited: Accreting, highly magnetized neutron stars as the engines of ultraluminous X-ray sources
- Modelling the spin equilibrium of neutron stars in LMXBs without gravitational radiation
- Propeller effect in two brightest transient X-ray pulsars: 4U 0115+63 and V 0332+53
- Long-term Properties of Accretion Disks in X-ray Binaries: I. the variable third period in SMC X-1
- Evidence for precession of the isolated neutron star RX J0720.4-3125
- Magnetic fields in superconducting neutron stars
- The Distance to M51
- A 78 Day X-ray Period Detected from NGC 5907 ULX1 by Swift
- A Potential Cyclotron Resonant Scattering Feature in the ULX Pulsar NGC 300 ULX1 seen by NuSTAR and XMM-Newton
- Equilibrium spin pulsars unite neutron star populations
- Searching for Outflows in Ultraluminous X-ray Sources Through High-Resolution X-ray Spectroscopy
- No magnetars in ULXs
- Timing properties of ULX pulsars: optically thick envelopes and outflows
- Super-Eddington accretion discs with advection and outflows around magnetized neutron stars
- The contrasting magnetic fields of superconducting pulsars and magnetars
- Super-Eddington accretion onto a magnetized neutron star
- NGC 300 ULX1: spin evolution, super-Eddington accretion and outflows
- Theory of Disk Accretion onto Magnetic Stars
- Pulsar state switching, timing noise and free precession
- A universal relation for the propeller mechanisms in magnetic rotating stars at different scales
- Lense-Thirring precession in ULXs as a possible means to constrain the neutron star equation-of-state
- Variable neutron star free precession in Hercules X-1 from evolution of RXTE X-ray pulse profiles with phase of the 35-day cycle
- NGC 300 ULX1: A test case for accretion torque theory
- The Lense-Thirring timing-accretion plane for ULXs
- Spectral variations of the X-ray binary pulsar LMC X-4 during its long period intensity variation and a comparison with Her X-1
- Mode switching and oscillations in PSR B1828-11
- Changes in the long term intensity variations in Cyg X-2 and LMC X-3
- Pulse-phase spectroscopy of SMC X-1 with Chandra and XMM-Newton: reprocessing by a precessing disk?
- SPH simulations of irradiation-driven warped accretion discs and the long periods in X-ray binaries
- Accreting, highly magnetized neutron stars at the Eddington limit: A study of the 2016 outburst of SMC X-3
- Two ~35 day clocks in Her X-1: evidence for neutron star free precession
- Modeling the light curves of ultraluminous X-ray sources as precession
- A New Two-Fluid Radiation-Hydrodynamical Model for X-ray Pulsar Accretion Columns
- Uncovering Red and Dusty Ultraluminous X-ray Sources with Spitzer
- Evidence for Optically Thick, Eddington-limited Winds Driven by Supercritical Accretion
- SWIFT Detection of a 65-Day X-ray Period from the Ultraluminous Pulsar NGC 7793 P13
- Suzaku X-ray Spectra and Pulse Profile Variations during the Superorbital Cycle of LMC X-4
- Optically Thick Outflows of Supercritical Accretion Discs: Radiative Diffusion Approach
- Evidence for the radiation-pressure dominated accretion disk in bursting pulsar GRO J1744-28 using timing analysis
- A Possible 55-day X-ray Period of the Ultraluminous Accreting Pulsar M82 X-2
- Longterm properties of accretion discs in X-ray Binaries - III. A search for spin-superorbital correlation in SMC X-1
Cited by in corpus (43)
- Ultraluminous X-ray sources
- Periodic Fast Radio Bursts from Luminous X-ray Binaries
- Ultraluminous X-Ray Sources
- Science objectives of the Einstein Probe mission
- Long-term X-ray spectral evolution of Ultraluminous X-ray sources: implications on the accretion flow geometry and the nature of the accretor
- Pulsing and Non-Pulsing ULXs: the Iceberg Emerges
- The 2019 super-Eddington outburst of RX J0209.6-7427: Detection of pulsations and constraints on the magnetic field strength
- The origin of pulsating ultra-luminous X-ray sources: Low- and intermediate-mass X-ray binaries containing neutron star accretors
- Pulsating ULXs: large pulsed fraction excludes strong beaming
- Swift monitoring of M51: A 38-day super-orbital period for the pulsar ULX7 and a new transient ULX
- Discovery of a recurrent spectral evolutionary cycle in the ultra-luminous X-ray sources Holmberg II X-1 and NGC 5204 X-1
- Orbital and super-orbital periods in ULX pulsars, disc-fed HMXBs, Be/X-ray binaries and double-periodic variables
- On the Magnetic Fields, Beaming Fractions, and Fastness Parameters of Pulsating Ultra-Luminous X-Ray Sources
- Chandra probes the X-ray variability of M51 ULX-7: evidence of propeller transition and X-ray dips on orbital periods
- The rare X-ray flaring activity of the Ultraluminous X-ray source NGC 4559 X7
- A Bayesian approach for torque modelling of BeXRB pulsars with application to super-Eddington accretors
- A New Transient Ultraluminous X-ray Source in NGC 7090
- Population synthesis of ultraluminous X-ray sources with magnetised neutron stars
- Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7
- The Transient Ultra-luminous X-ray Source, ULX-4, in M51
- A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2
- Possible Periodic Dips in the Pulsating Ultraluminous X-ray Source M51 ULX-7
- Study on the magnetic field strength of NGC 300 ULX1
- A new pulsating neutron star in the Ultraluminous X-ray source NGC 4559 X7?
- On the Magnetic Fields of Ultraluminous X-ray Pulsars
- Early neutron star evolution in high-mass X-ray binaries
- Detection of 125.5-day Optical Periodic Modulation of the Neutron Star M51 ULX-8
- The Luminosity Phase Space of Galactic and Extragalactic X-ray Transients Out to Intermediate Redshifts
- The impact of precession on the observed population of ULXs
- Radio emission from colliding outflows in high-mass X-ray binaries with strongly magnetized neutron stars
- On the peculiar torque reversals and the X-ray luminosity history of the accretion-powered X-ray pulsar 4U 1626--67
- The ultraluminous X-ray source M81 X-6: a weakly magnetised neutron star with a precessing accretion disc?
- The largest bright ULX population in a galaxy: X-ray variability and Luminosity Function in the Cartwheel ring Galaxy
- Investigation of the timing and spectral properties of an Ultra-luminous X-ray pulsar NGC 7793 P13
- The variability behavior of NGC 925 ULX-3
- Long-Term X-Ray/UV Variability in ULXs
- Pulsating ultraluminous X-ray sources: modeling the thermal emission and polarization properties
- Magnetic precession as a model for QPOs in PULXs: flat-top noise ULXs are different
- A Study of Spectral Variability between flaring and non-flaring state in M74 X-1
- Monte-Carlo simulations on possible collimation effects of outflows to fan-beamed emission of ultraluminous accreting X-ray pulsars
- Ultraluminous X-ray sources in the first eROSITA survey I. Candidate catalogs
- Exploring the magnetic field of the ultraluminous X-ray pulsar NGC 4631 X-8
- Studying magnetic fields of ultraluminous X-ray pulsars using different accretion torques