Abstract
The advent of the next generation of gamma-ray experiments, led by GLAST, AGILE, INTEGRAL and a host of atmospheric Cerenkov telescopes coming on line in the next few years, will enable ground-breaking discoveries relating to the presently enigmatic set of EGRET/CGRO UID galactic sources that have yet to find definitive identifications. Pulsars are principal candidates for such sources, and many are expected to be detected by GLAST, some that are radio-selected, like most of the present EGRET/Comptel pulsars, and perhaps even more that are detected via independent pulsation searches. At this juncture, it is salient to outline the principal predictions of pulsar models that might aid identification of gamma-ray sources, and moreover propel subsequent interpretation of their properties. This review summarizes relevant characteristics of the polar cap model, emphasizing where possible distinctions from the competing outer gap model. Foremost among these considerations are the hard X-ray to gamma-ray spectral shape, high energy cutoffs and pulse profiles, and how these characteristics generally depend on pulsar period and period derivative, as well as observational viewing angle. The polar cap model exhibits definitive signatures that will be readily tested by the detections of GLAST and other experiments, thereby establishing cogent observational diagnostics. The paper focuses on different classes of pulsars that might define agendas and parameter regimes for blind gamma-ray pulsation searches; examples include the highly-magnetized ones that are currently quite topical in astrophysics.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Adler,S. L.1971, Ann. Phys.67599.
Arons,J.1983, ApJ266215.
Arons,J. & Scharlemann,E.T.1979 ApJ854 879.
Baring,M.G.1995,ApJ440L69.
Baring,M.G. & Harding A.K.1997,ApJ482 372.
Baring,M.G. & Harding A.K.1998,ApJ507 L55.
Baring,M.G. & Harding A.K. 2000,AAS HEAD Meeting,Honolulu,HI, Bull.AAS 32, 12.43.
Baring,M.G. & Harding A.K. 2001,ApJ547929 (BH01).
Becker,W.&Trümper,J.1997,Astron.Astr.326,682.
Bulik,T.,Rudak,B. & Dyks,J.2000,MNRAS317 97.
Camilo, F., et al. 2000,ApJ 541 367.
Cheng,K.S.1994,inTowards a Major Atmospheric Cerenkov Detector,ed. T. Kifune (Tokyo, Universal Academy)p. 25.
Cheng,K. S.,Ho,C.& Ruderman, M. A. 1986,ApJ300500
Cheng,K.S. & Zhang,L.1998,ApJ493 L35.
Daugherty,J.K.& Harding A.K.1982,ApJ 252 337.
Daugherty,J.K. & Harding A.K.1983,ApJ273 761.
Daugherty,J.K.& Harding A.K.1989, ApJ336 861.
Daugherty,J.K.& Harding, A.K.1996,ApJ 458278.
Dyks,J. & Rudak,B.2000,MNRAS319 477.
Gehrels,N.,etal.2000,Nature 404,363.
Gil,J.A.& Han,J. L.1996,ApJ458 265.
Gonthier,P.L.&Harding,A.K.1994,ApJ425767.
Gonthier,P. L., Harding, A. K., Baring, M. G., Costello, R. M. & Mercer, C. L. 2000,ApJ 540 907.
Gonthier,P.L.,et al.2001,ApJ submitted.
Grenier,I.A.2000,Astron.Astr.(Lett.)364 L93.
Harding,A.K.1981,ApJ245267.
Harding, A. K. 2001a, High Energy Gamma-Ray Astronomy,eds. F.A.Aharonian,H.Völk, AIP Conf.Proc.558,p.115.
Harding, A.K.2001b,to appear inProc. of Gamma 2001 Symposium,eds. N.Gehrels,C. Shrader & S.Ritz(AIP, New York)
Harding A.K.& Baring,M.G.1996,Proc.Huntsville Gamma-Ray Burst Workshop,eds. Kouveliotou,C.,Briggs, M.S.,and Fishman, G. J.(AIP 384, New York)p. 941
Harding A. K., Baring, M. G. & Gonthier, P. L. 1997, ApJ 476, 246 (HBG97).
Harding, A. K. & Daugherty, J. K. 1998, Adv. Space Res. 21(1/2), 251.
Harding, A. K. & Muslimov, A. G. 1998, ApJ 508, 328.
Harding, A. K. & Zhang, B. 2001, ApJ 548 L37.
Hirotani, K. 2000, ApJ 549 495.
Hurley, K. et al. 1999, ApJ 510 L111.
Jackson, J. D. 1975, Classical Electrodynamics, (Wiley and Sons, New York)
Kanbach, G., et al. 1994, Astron. Astr. 289 855.
Kanbach, G., et al. 2000, AAS HEAD Meeting, Honolulu, HI, Bull. AAS 32 16.06.
Kuiper, L., et al. 2000, Astron. Astr. 359 615.
Lei, F., Dean, A. J. & Hills, G. L. 1997, Space Sci. Rev. 82 309. Lessard, R. W. 2000, ApJ 531 942.
Lu, T., Wei, D. M. & Song, L. M. 1994, Astron. Astr. 290 815.
Mazets E. P. et al. 1981, Adv. Space Sci.80, 3,85,119.
Muslimov, A. G. & Tsygan, A. I. 1992, MNRAS 255 61.
Nel, H. I. et al. 1993, ApJ 418 836.
Pavlov, G. G., et al. 2001, ApJ submitted [astro-ph/0103171].
Pivovaroff, M. J., Kaspi, V. M. & Camilo, F. 2000, ApJ 535 379.
Romani, R. W. 1996, ApJ 470 469.
Romani, R. W. & Yadigaroglu, I.A. 1995, ApJ 438 314.
Rudak, B. & Dyks, J. 1999, MNRAS 303 477.
Ruderman, M. A. & Sutherland, P. G. 1975, ApJ 196 51 (RS75).
Sturner, S. J. 1995, ApJ 446 292.
Sturner, S. J. & Dermer, C. D., 1994, ApJ 420 L79.
Sturrock, P. A. 1971, ApJ 164 529.
Sturrock, P. A., Baker, K. & Turk, J. S. 1976, ApJ 206 273.
Taylor, J. H. & Cordes, J. M. ApJ 411, 674.
Taylor, J. H., Manchester, R. N. & Lyne, A. G. 1993, ApJ Supp. 88, 529.
Thompson, D. J. 2001, High Energy Gamma-Ray Astronomy, eds. F. A. Aharonian, H. Völk, AIP Conf. Proc. 558, p. 103
Tsai, W.-Y. & Erber, T. 1974, Phys. Rev. D 10, 492.
Usov, V. V. & Melrose, D. B. 1995, Aust. J. Phys. 48, 571.
Weatherall, J. C. & Eilek, J. A. 1997, ApJ 474, 407.
Wei, D. M., Song, L. M. & Lu, T. 1997, Astron. Astr.32398.
Yadigaroglu, I.-A. 1997, Exp. Astron. 7, 221.
Yadigaroglu, I.-A. & Romani, R. W. 1995, ApJ 449 211.
Zhang, B. & Harding, A. K. 2000a, ApJ532 1150.
Zhang, B. & Harding, A. K. 2000b, ApJ 535, L51.
Zhang, L. & Cheng, K. S. 2001, MNRAS 320, 477.
Zhang, L., Zhang, Y. J. & Cheng, K. S. 2000, Astron. Astr. 357, 957.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Baring, M.G. (2001). Identifying the Mysterious Egret Sources: Signatures of Polar Cap Pulsar Models. In: Carramiñana, A., Reimer, O., Thompson, D.J. (eds) The Nature of Unidentified Galactic High-Energy Gamma-Ray Sources. Astrophysics and Space Science Library, vol 267. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1007-8_12
Download citation
DOI: https://doi.org/10.1007/978-94-010-1007-8_12
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3875-1
Online ISBN: 978-94-010-1007-8
eBook Packages: Springer Book Archive