Advanced SearchSearch Tips
On the Spectral Shape of Non-recycled γ-ray Pulsars
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
On the Spectral Shape of Non-recycled γ-ray Pulsars
Hui, Chung-Yue; Lee, Jongsu;
  PDF(new window)
More than 100 γ−ray pulsars have been discovered by the Fermi Gamma-ray Space Telescope. With a significantly enlarged sample size, it is possible to compare the properties of different classes. Radio-quiet (RQ) γ−ray pulsars form a distinct population, and various studies have shown that the properties of the RQ population can be intrinsically different from those of radio-loud (RL) pulsars. Utilizing these differences, it is possible to further classify the pulsar-like unidentified γ−ray sources into sub-groups. In this study, we suggest the possibility of distinguishing RQ/RL pulsars by their spectral shape. We compute the probabilities of a pulsar to be RQ or RL for a given spectral curvature. This can provide a key to the estimation of the intrinsic fraction of radio-quietness in the γ−ray pulsar population, which can place a tight constraint on the emission geometry.
gamma rays;stars;pulsars;genera;
 Cited by
Abdo AA, Ajello M, Allafort A, Baldini L, Ballet J, et al., The second Fermi large area telescope catalog of gamma-ray pulsars, Astrophys. J. Suppl. Ser. 208, 17 (2013). crossref(new window)

Acero F, Ackermann M, Ajello M, Albert A, Atwood WB, et al., VizieR online data catalog: Fermi LAT third source catalog (3FGL) (Acero+, 2015) [Internet], (2015). available from:

Cheng KS, Zhang L, The statistics of gamma-ray pulsars, Astrophys. J. 498, 327-341 (1998). crossref(new window)

Hui CY, Park SM, Hu CP, Lin LCC, Li KL, et al., Searches for millisecond pulsar candidates among the unidentified Fermi objects, Astrophys. J. 809, 68 (2015). crossref(new window)

Hui CY, Lee J, Takata J, Ng CW, Cheng KS, Differences between radio-loud and radio-quiet γ-ray pulsars as revealed by Fermi, Astrophys. J., submitted (2016).

Kerr M, Improving sensitivity to weak pulsations with photon probability weighting, Astrophys. J. 732, 38 (2011). crossref(new window)

Kijak J, Gil J, Radio emission regions in pulsars, Mon. Not. Roy. Astron. Soc. 299, 855-861 (1998). crossref(new window)

Kijak J, Gil J, Radio emission altitude in pulsars, Astron. Astrophys. 397, 969-972 (2003). crossref(new window)

Marelli M, The X-ray behavior of Fermi/LAT pulsars, PhD Dissertation, University of Insubria (2012)

Marelli M, De Luca A, Caraveo PA, A multiwavelength study on the high-energy behavior of the Fermi/LAT pulsars, Astrophys. J. 733, 82 (2011). crossref(new window)

Marelli M, Mignani RP, De Luca A, Saz Parkinson PM, Salvetti D, et al., Radio-quiet and radio-loud pulsars: similar in gamma-rays but different in X-rays, Astrophys. J. 802, 78 (2015). crossref(new window)

Saz Parkinson PM, Xu H, Yu PLH, Salvetti D, Marelli M, et al., Classification and ranking of Fermi LAT gamma-ray sources from the 3FGL catalog using machine learning techniques, Astrophys. J. 820, 8 (2016). crossref(new window)

Sokolova EV, Rubtsov GI, Search for differences between radio-loud and radio-quiet gamma-ray pulsar populations with Fermi-LAT data, eprint arXiv:1601.00330 (2016).

Takata J, Shibata S, Hirotan K, Chang HK, A two-dimensional electrodynamical outer gap model for γ-ray pulsars: γ-ray spectrum, Mon. Not. Roy. Astron. Soc. 366, 1310-1328 (2006). crossref(new window)

Takata J, Chang H, Shibata S, Particle acceleration and nonthermal emission in the pulsar outer magnetospheric gap, Mon. Not. Roy. Astron. Soc. 386, 748-758 (2008). crossref(new window)