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We previously obtained constraints on the viewing geometries of 6 Fermi LAT pulsars using a multiwavelength approach (Seyffert et al., 2011). To obtain these constraints we compared the observed radio and $\gamma$-ray light curves (LCs) for…

高能天体物理现象 · 物理学 2015-01-28 A. S. Seyffert , C. Venter , T. J. Johnson , A. K. Harding

We demonstrate a method for quantitatively comparing gamma-ray pulsar light curves with magnetosphere beaming models. With the Fermi LAT providing many pulsar discoveries and high quality pulsar light curves for the brighter objects, such…

高能天体物理现象 · 物理学 2015-03-13 Roger W. Romani , Kyle P. Watters

The high-quality Fermi LAT observations of gamma-ray pulsars have opened a new window to understanding the generation mechanisms of high-energy emission from these systems. The high statistics allow for careful modeling of the light curve…

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 comparing simulated and observed light-curve morphological…

高能天体物理现象 · 物理学 2016-04-06 M. Pierbattista , A. K. Harding , P. L. Gonthier , I. A. Grenier

The Fermi Large Area Telescope (LAT) has recently reported the detection of pulsed gamma-rays from 6 young pulsars (J0631+1036, J0659+1414, J0742-2822, J1420-6048, J1509-5850, and J1718-3825), all exhibiting single-peaked pulse profiles…

高能天体物理现象 · 物理学 2011-05-23 A. S. Seyffert , C. Venter , O. C. de Jager , A. K. Harding

Since the launch of the Large Area Telescope (LAT) on board the Fermi spacecraft in June 2008, the number of observed gamma-ray pulsars has increased dramatically. A large number of these are also observed at radio frequencies. Constraints…

高能天体物理现象 · 物理学 2012-01-24 A. S. Seyffert , C. Venter , T. J. Johnson , A. K. Harding

Over the past six years, the Fermi Large Area Telescope has detected more than 150 gamma-ray pulsars, discovering a variety of light curve trends and classes. Such diversity hints at distinct underlying magnetospheric and/or emission…

高能天体物理现象 · 物理学 2015-04-28 M. Breed , C. Venter , A. K. Harding , T. J. Johnson

The light curves of gamma-ray pulsars detected by the Fermi Large Area Telescope show great variety in profile shape and position relative to their radio profiles. Such diversity hints at distinct underlying magnetospheric and/or emission…

高能天体物理现象 · 物理学 2014-11-10 M. Breed , C. Venter , A. K. Harding , T. J. Johnson

We present a summary of gamma-ray millisecond pulsar (MSP) observations with the Fermi Large Area Telescope. The radio and gamma-ray light curves of these MSPs have been modeled in the framework of the retarded vacuum dipole magnetic field.…

高能天体物理现象 · 物理学 2019-08-14 Tyrel J. Johnson , Christo Venter , Alice K. Harding , Lucas Guillemot

An interesting new high-energy pulsar sub-population is emerging following early discoveries of gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope (LAT). We present results from 3D emission modeling, including the…

高能天体物理现象 · 物理学 2014-11-20 C. Venter , A. K. Harding , L. Guillemot

Gamma-ray emission from pulsars is thought to arise from accelerating regions in pulsar's outer magnetosphere. The shape of the light curves is thus sensitive to the details of the magnetic geometry of the magnetosphere. In this work, we…

高能天体物理现象 · 物理学 2009-11-03 Xue-Ning Bai , Anatoly Spitkovsky

The nine millisecond pulsars (MSPs) that have now been detected by Fermi-LAT are providing an excellent opportunity to probe the emission geometry of these ancient compact objects. As they are radio-loud, one may use the relative phase lags…

高能天体物理现象 · 物理学 2009-12-15 C. Venter , A. K. Harding , L. Guillemot

Fermi Large Area Telescope (LAT) has recently detected 8 gamma-ray millisecond pulsars (MSPs), providing an unprecedented opportunity to probe the magnetospheres of these low-spin-down pulsars. We performed 3D emission modeling, including…

高能天体物理现象 · 物理学 2009-11-26 C. Venter , A. K. Harding , L. Guillemot

We report the detection of pulsed gamma-rays for PSRs J0631+1036, J0659+1414, J0742-2822, J1420-6048, J1509-5850 and J1718-3825 using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (formerly known as GLAST).…

太阳与恒星天体物理 · 物理学 2010-01-06 The Fermi LAT collaboration , the Fermi Pulsar Timing Consortium

The light curves and spectral properties of more than 200 $\gamma$-ray pulsars have been measured in unsurpassed detail in the eight years since the launch of the hugely successful Fermi Large Area Telescope (LAT) $\gamma$-ray mission. We…

高能天体物理现象 · 物理学 2017-02-20 Monica Barnard , Christo Venter , Alice K. Harding

The Fermi Large Area Telescope (LAT) has revolutionized high-energy (HE) astronomy, and is making enormous contributions particularly to gamma-ray pulsar science. As a result of the many new pulsar discoveries, the gamma-ray pulsar…

高能天体物理现象 · 物理学 2011-12-15 C. Venter , T. J. Johnson , A. K. Harding

Pulsed gamma rays have been detected with the Fermi Large Area Telescope (LAT) from more than 20 millisecond pulsars (MSPs), some of which were discovered in radio observations of bright, unassociated LAT sources. We have fit the radio and…

高能天体物理现象 · 物理学 2011-11-04 Tyrel J. Johnson , Alice K. Harding , Christo Venter

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 radio-loud and radio-weak or radio-quiet gamma-ray pulsars.…

高能天体物理现象 · 物理学 2015-05-27 Marco Pierbattista , Isabelle Grenier , Alice Harding , Peter L. Gonthier

Guillemot et al. recently reported the discovery of $\gamma$-ray pulsations from the 22.7ms pulsar (pulsar A) in the famous double pulsar system J0737-3039A/B. The $\gamma$-ray light curve (LC) of pulsar A has two peaks separated by…

高能天体物理现象 · 物理学 2014-11-05 A. S. Seyffert , C. Venter , A. K. Harding , T. J. Johnson

Since its launch in 2008, the Fermi Large Area Telescope (LAT) has detected over 200 -ray pulsars above 100 MeV. This population of pulsars is characterised by a rich diversity of light curve morphologies. Researchers have been using both…

高能天体物理现象 · 物理学 2017-12-25 M. C. Bezuidenhout , C. Venter , A. S. Seyffert , A. K. Harding
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