Synchro-curvature emitting regions in high-energy pulsar models

Abstract

The detected high-energy pulsars' population is growing in number, and thus, having agile and physically relevant codes to analyze it consistently is important. Here, we update our existing synchro-curvature radiation model by including a better treatment of the particle injection, particularly where the large pitch angle particles dominate the spectra, and by implementing a fast and accurate minimization technique. The latter allows a large improvement in computational cost, needed to test model enhancements and to apply the model to a larger pulsar population. We successfully fit the sample of pulsars with X-ray and $\gamma$-ray data. Our results indicate that, for every emitting particle, the spatial extent of their trajectory where the pitch angle is large and most of the detected X-ray radiation is produced is a small fraction of the light cylinder. We also confirm with this new approach that synchrotron radiation is not negligible for most of the gamma-ray pulsars detected. In addition, with the results obtained, we argue that J0357+3205 and J2055+2539 are MeV-pulsar candidates and are suggested for exhaustive observations in this energy band.

arXiv comment12 pages, 7 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (20)

• The ATNF Pulsar Catalogue
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Electrodynamics of axisymmetric pulsar magnetosphere with electron-positron discharge: a numerical experiment
• High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar
• Ab-initio pulsar magnetosphere: three-dimensional particle-in-cell simulations of axisymmetric pulsars
• Detection of the Geminga pulsar with MAGIC hints at a power-law tail emission beyond 15 GeV
• On the Axisymmetric Force-Free Pulsar Magnetosphere
• First Ground-based Measurement of Sub-20 GeV to 100 GeV $\gamma$-rays from the Vela Pulsar with H.E.S.S. II
• Order parameters for the high-energy spectra of pulsars
• Compact formulae, dynamics and radiation of charged particles under synchro-curvature losses
• Synchro-curvature modelling of the multi-frequency non-thermal emission of pulsars
• The Fermi LAT detection of magnetar-like pulsar PSR J1846-0258 at high-energy gamma-rays
• An assessment of the pulsar outer gap model. I: Assumptions, uncertainties, and implications for the gap size and the accelerating field
• Modeling of the gamma-ray pulsed spectra of Geminga, Crab, and Vela with synchro-curvature radiation
• A systematic synchro-curvature modelling of pulsar $\gamma$-ray spectra unveils hidden trends
• Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars
• An assessment of the pulsar outer gap model. II: Implications for the predicted $\gamma$-ray spectra
• Theoretically motivated search and detection of non-thermal pulsations from PSRs J1747-2958, J2021+3651, and J1826-1256
• A novel approach for the analysis of the geometry involved in determining light curves of pulsars
• Search for Very High-Energy Emission from the millisecond pulsar PSR J0218+4232

Cited by in corpus (2)

• Observational connection of non-thermal X-ray emission from pulsars with their timing properties and thermal emission
• Localisation of the non-thermal X-ray emission of PSR~J2229+6114 from its multi-wavelength pulse profiles