117 citations · 928 across the 31 of their papers we have counts for
20 papers · 1 filter
The Mysterious Magnetospheres of Magnetars
Matthew G. Baring, Zorawar Wadiasingh, Peter L. Gonthier +2
Magnetars are the most luminous compact objects in the stellar mass range observed in the Milky Way, with giant flares of hard X-ray power ~10^45 erg/sec being detected from three…
Magnetars as Astrophysical Laboratories of Extreme Quantum Electrodynamics: The Case for a Compton Telescope
Zorawar Wadiasingh, George Younes, Matthew G. Baring +14
A next generation of Compton and pair telescopes that improve MeV-band detection sensitivity by more than a decade beyond current instrumental capabilities will open up new insight…
Population syntheses of millisecond pulsars from the Galactic Disk and Bulge
Peter L. Gonthier, Alice K. Harding, Elizabeth C. Ferrara +3
We present the results of a population synthesis of radio and gamma-ray millisecond pulsars (MSPs) from the Galactic Disk (GD). Using 92 radio millisecond pulsars detected in 13 ra…
Resonant Inverse Compton Scattering Spectra from Highly-magnetized Neutron Stars
Zorawar Wadiasingh, Matthew G. Baring, Peter L. Gonthier +1
Hard, non-thermal, persistent pulsed X-ray emission extending between 10 keV and keV has been observed in nearly ten magnetars. For inner-magnetospheric models of such e…
Magnetar Hard Spectral Tails
Zorawar Wadiasingh, Matthew G. Baring, Peter L. Gonthier +1
Pulsed non-thermal quiescent emission between 10 keV and around 150 keV has been observed in magnetars. For inner magnetospheric models of such hard X-ray signals, resonan…
Hard X-ray Quiescent Emission in Magnetars via Resonant Compton Upscattering
M. G. Baring, Z. Wadiasingh, P. L. Gonthier +1
Non-thermal quiescent X-ray emission extending between 10 keV and around 150 keV has been seen in about 10 magnetars by RXTE, INTEGRAL, Suzaku, NuSTAR and Fermi-GBM. For inner magn…
3FGL Demographics Outside the Galactic Plane using Supervised Machine Learning: Pulsar and Dark Matter Subhalo Interpretations
N. Mirabal, E. Charles, E. C. Ferrara +4
Nearly 1/3 of the sources listed in the Third Fermi Large Area Telescope (LAT) catalog (3FGL) remain unassociated. It is possible that predicted and even unanticipated gamma-ray so…
Young and middle age pulsar light-curve morphology: Comparison of Fermi observations with gamma-ray and radio emission geometries
M. Pierbattista, A. K. Harding, P. L. Gonthier +1
Thanks to the huge amount of gamma-ray pulsar photons collected by the Fermi Large Area Telescope since June 2008, it is now possible to constrain gamma-ray geometrical models by c…
The millisecond pulsar contribution to the rising positron fraction
Christo Venter, Andreas Kopp, Alice K Harding +2
Pair cascades from millisecond pulsars (MSPs) may be a primary source of Galactic electrons and positrons that contribute to the increase in positron flux above 10 GeV as observed…
Cosmic-ray positrons from millisecond pulsars
C. Venter, A. Kopp, A. K. Harding +2
Observations by the Fermi Large Area Telescope of gamma-ray millisecond pulsar light curves imply copious pair production in their magnetospheres, and not exclusively in those of y…
The Contribution of Millisecond Pulsars to the Galactic Cosmic-Ray Lepton Spectrum
C. Venter, A. Kopp, P. L. Gonthier +2
Pulsars are believed to be sources of relativistic electrons and positrons. The abundance of detections of gamma-ray millisecond pulsars by Fermi Large Area Telescope coupled with…
Compton scattering in strong magnetic fields: Spin-dependent influences at the cyclotron resonance
Peter L. Gonthier, Matthew G. Baring, Matthew T. Eiles +3
The quantum electrodynamical (QED) process of Compton scattering in strong magnetic fields is commonly invoked in atmospheric and inner magnetospheric models of x-ray and soft gamm…
Population Synthesis of Normal Radio and Gamma-ray Pulsars Using Markov Chain Monte Carlo Techniques
Peter L. Gonthier, Caleb D. Billman, Alice K. Harding
We present preliminary results of a pulsar population synthesis of normal pulsars from the Galactic disk using a Markov Chain Monte Carlo method to better understand the parameter…
Resonant Compton Upscattering in High Field Neutron Stars
Peter L. Gonthier, Matthew T. Eiles, Zorawar Wadiasingh +1
The extremely efficient process of resonant Compton upscattering by relativistic electrons in high magnetic fields is believed to be a leading emission mechanism of high field puls…
Constraining gamma-ray pulsar gap models with a simulated pulsar population
M. Pierbattista, I. A. Grenier, A. K. Harding +1
With the large sample of young gamma-ray pulsars discovered by the Fermi Large Area Telescope (LAT), population synthesis has become a powerful tool for comparing their collective…
Cooling Rates for Relativistic Electrons Undergoing Compton Scattering in Strong Magnetic Fields
Matthew G. Baring, Zorawar Wadiasingh, Peter L. Gonthier
For inner magnetospheric models of hard X-ray and gamma-ray emission in high-field pulsars and magnetars, resonant Compton upscattering is anticipated to be the most efficient proc…
Constraining pulsar gap models with the light-curve and flux properties of the gamma-ray pulsar population
Marco Pierbattista, Isabelle Grenier, Alice Harding +1
We compare population synthesis results for inner and outer magnetosphere emission models with the various characteristics measured in the first LAT pulsar catalogue for both the r…
Population Synthesis of Radio and Gamma-ray Pulsars in the Fermi Era
Peter L. Gonthier, Caleb Billman, Alice K. Harding +2
We present results of our pulsar population synthesis of normal pulsars from the Galactic disk using our previously developed computer code. On the same footing, we use slot gap an…
Constraining pulsar gap models with light-curve shapes of a simulated gamma-ray pulsar population
Marco Pierbattista, Isabelle Grenier, Alice Harding +1
The Fermi Gamma-Ray Space Telescope has discovered many gamma-ray pulsars, both as radio-loud objects and radio-quiet or radio-weak pulsars that have been identified through blind…
Population Synthesis of Radio Pulsars in the Fermi Era
Peter L. Gonthier, Erin Nagelkirk, Melanie Stam +1
We present results of our pulsar population synthesis of normal pulsars from the Galactic disk using our previously developed Monte-Carlo code. From our studies of observed radio p…