Effects from Dark Matter Halos on X-ray Pulsar Pulse Profiles

Abstract

Neutron stars (NSs) can capture dark matter (DM) particles because of their deep gravitational potential and high density. The accumulated DM can affect the properties of NSs. In this work we use a general relativistic two-fluid formalism to solve the structure of DM-admixed NSs (DANSs) and the surrounding spacetime. Specifically, we pay attention to the situation where those DANSs possess DM halos. Due to the gravitational effect of the DM halo, the pulse profile of an X-ray pulsar is changed. Our study finds a universal relation between the peak flux deviation of the pulse profile and $M_{\mathrm{halo}}/R_{\mathrm{BM}}$, which is the ratio of the DM halo mass, $M_{\mathrm{halo}}$, to the baryonic matter (BM) core radius, $R_{\mathrm{BM}}$. Our results show that, when $M_{\mathrm{halo}}/R_{\mathrm{BM}}=0.292$ and the DM particle mass $m_f=0.3$GeV, the maximum deviation of the profile can be larger than 100$\%$, which has implication in X-ray pulsar observation.

arXiv comment10 pages, 11 figures; accepted by PRD

References in corpus (56)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• 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
• Results from a search for dark matter in the complete LUX exposure
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Rotation Curves of Spiral Galaxies
• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• Can dark matter be a Bose-Einstein condensate?
• Dark Matter Search Results from the PandaX-4T Commissioning Run
• WIMP Annihilation and Cooling of Neutron Stars
• Compact Stars as Dark Matter Probes
• Spin-Isospin Structure and Pion Condensation in Nucleon Matter
• Dark Matter Detection in the Light of Recent Experimental Results
• Neutron Stars as Dark Matter Probes
• Can Neutron stars constrain Dark Matter?
• A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437$\unicode{x2013}$4715
• An updated mass-radius analysis of the 2017-2018 NICER data set of PSR J0030+0451
• Effects of mirror dark matter on neutron stars
• Dark Matter Effects On Neutron Star Properties
• Radio Signals from Axion Dark Matter Conversion in Neutron Star Magnetospheres
• Dark-Matter Admixed Neutron Stars
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. II. Emission from Hot Spots on a Rapidly Rotating Neutron Star
• Bosonic Dark Matter in Neutron Stars and its Effect on Gravitational Wave Signal
• First star-forming structures in fuzzy cosmic filaments
• Pulse profiles of millisecond pulsars and their Fourier amplitudes
• The Oblate Schwarzschild Approximation for Light Curves of Rapidly Rotating Neutron Stars
• Ultra-Light Dark Matter Resonates with Binary Pulsars
• Quasi-Normal Modes of General Relativistic Superfluid Neutron Stars
• Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations
• Quiescent Thermal Emission from the Neutron Star in Aql X-1
• Effects of fermionic dark matter on properties of neutron stars
• Dark matter admixed neutron stars
• Gravitational effects of condensate dark matter on compact stellar objects
• Constraining scalar fields with stellar kinematics and collisional dark matter
• Dark matter admixed neutron star properties in the light of X-ray pulse profile observations
• Substructure in the lens HE 0435-1223
• Thermal X-rays from Millisecond Pulsars: Constraining the Fundamental Properties of Neutron Stars
• Bosonic Dark Matter in Light of the NICER Precise Mass-Radius Measurements
• Dark Matter or Regular Matter in Neutron Stars? How to tell the difference from the coalescence of compact objects
• Effects of Rapid Stellar Rotation on Equation of State Constraints Derived from Quasi-Periodic Brightness Oscillations
• Tidal Deformability of Fermion-Boson Stars: Neutron Stars Admixed with Ultra-Light Dark Matter
• Constraining self-interacting fermionic dark matter in admixed neutron stars using multimessenger astronomy
• Binary pulsars as dark-matter probes
• Tides in merging neutron stars: Consistency of the GW170817 event with experimental data on finite nuclei
• NICER Detection of Thermal X-ray Pulsations from the Massive Millisecond Pulsars PSR J0740+6620 and PSR J1614-2230
• Strong-field effects in massive scalar-tensor gravity for slowly spinning neutron stars and application to X-ray pulsar pulse profiles
• Constraining properties of asymmetric dark matter candidates from gravitational-wave observations
• Measuring the mass of the black widow PSR J1555-2908
• Fermionic Light Dark Matter particles and the New Physics of Neutron Stars
• Neutron stars as extreme laboratories for gravity tests
• Neutron star pulse profiles in scalar-tensor theories of gravity
• Oscillation Modes and Gravitational Waves from Strangeon Stars
• Towards Uncovering Dark Matter Effects on Neutron Star Properties: A Machine Learning Approach
• Improved bounds on the bosonic dark matter with pulsars in the Milky Way
• Neutron star mass in dark matter clumps

Cited by in corpus (4)

• Dense Matter in Neutron Stars with eXTP
• Rapidly spinning dark matter-admixed neutron stars
• Implications of Fermionic Dark Matter Interactions on Anisotropic Neutron Stars
• Constraining Fermionic Dark Matter with Galactic Neutron Stars