Advanced SearchSearch Tips
Theoretical Study of Gamma-ray Pulsars
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Theoretical Study of Gamma-ray Pulsars
Song, Yuzhe; Cheng, Kwong Sang; Takata, Jumpei;
  PDF(new window)
We use the non-stationary three dimensional two-layer outer gap model to explain gamma-ray emissions from a pulsar magnetosphere. We found out that for some pulsars like the Geminga pulsar, it was hard to explain emissions above a level of around 1 GeV. We then developed the model into a non-stationary model. In this model we assigned a power-law distribution to one or more of the spectral parameters proposed in the previous model and calculated the weighted phase-averaged spectrum. Though this model is suitable for some pulsars, it still cannot explain the high energy emission of the Geminga pulsar. An Inverse-Compton Scattering component between the primary particles and the radio photons in the outer magnetosphere was introduced into the model, and this component produced a sufficient number of GeV photons in the spectrum of the Geminga pulsar.
 Cited by
Ackermann M, Albert A, Baldini L, Ballet J, Barbiellini G, et al., An extremely bright gamma-ray pulsar in the Large Magellanic Cloud, Science 350, 801-805 (2015). crossref(new window)

Arons J, Pair creation above pulsar polar caps: geometrical structure and energetics of slot gaps, Astrophys. J. 266, 215-241 (1983). crossref(new window)

Cheng KS, Ho C, Ruderman M, Energetic radiation from rapidly spinning pulsars. I. Outer magnetosphere gaps, Astrophys. J. 300, 500-521 (1986a). crossref(new window)

Cheng, KS, Ho C, Ruderman M, Energetic radiation from rapidly spinning pulsars. I-Outer magnetosphere gaps. II-VELA and Crab, Astrophys. J. 300, 500-539 (1986b). crossref(new window)

Kuzmin AD, Losovsky BY, No low-frequency turn-over in the spectra of millisecond pulsars, Astron. Astrophys. 368, 203-238 (2001). crossref(new window)

Ng CY, Takata J, Leung GCK, Cheng KS, Philippopoulos P, High-energy emission of the first millisecond pulsar, Astrophys J. 787, 167-176 (2014). crossref(new window)

Romani WR, Watters KP, Constraining pulsar magnetosphere geometry with γ-ray light curves, Astrophys. J. 714, 810-824 (2010). crossref(new window)

Ruderman MA, Sutherland PG, Theory of pulsars-polar caps, sparks, and coherent microwave radiation, Astrophys. J. 196, 51-72 (1975). crossref(new window)

Takata J, Shibata S, Hirotani K, A pulsar outer gap model with trans-field structure, Mon. Not. Roy. Astron. Soc. 354, 1120-1132 (2004). crossref(new window)

Wang Y, Takata J, Cheng KS, Gamma-ray spectral properties of mature pulsars: a two-layer model, Astrophys. J. 720, 178-190 (2010). crossref(new window)

Wang Y, Takata J, Cheng KS, Three-dimensional two-layer outer gap model: Fermi energy-dependent light curves of the Vela pulsar, Mon. Not. Roy. Astron. Soc. 414, 2664-2673 (2011). crossref(new window)

Zhang L, Cheng KS, High-energy radiation from rapidly spinning pulsars with thick outer gaps, Astrophys. J. 487, 370-379 (1997). crossref(new window)