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Do Gamma-Ray Bursts Originate from an Extended Galactic Halo of High-Velocity Neutron Stars?

Published online by Cambridge University Press:  12 April 2016

Dieter H. Hartmann
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-1911
Lawrence E. Brown
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-1911
Lih-Sin The
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-1911
Eric V. Linder
Affiliation:
Center for Space Science and Astrophysics, Stanford University, Stanford, CA 94305
Vahé Petrosian
Affiliation:
Center for Space Science and Astrophysics, Stanford University, Stanford, CA 94305
George R. Blumenthal
Affiliation:
UCO/Lick Observatory, University of California at Santa Cruz, Santa Cruz, CA 95064
Kevin C. Hurley
Affiliation:
Space Sciences Laboratory, University of California at Berkeley, Berkeley CA 94720
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Abstract

The γ-ray burst brightness distribution is inhomogeneous and the distribution on the sky is nearly isotropic. These features argue against an association of γ-ray bursts with those Galactic objects that are known to exhibit a strong concentration toward the Galactic center or plane. The observed statistical properties indicate a cosmological origin. Circumstantial evidence suggests that neutron stars are involved in the burst phenomenon. Here we consider Population II neutron stars in an extended Galactic Halo (EGH) as an alternative to cosmological scenarios. The BATSE data indicate a small deviation from isotropy near the 2 σ level of statistical significance. If confirmed for an increasing number of bursts, these anisotropies could rule out cosmological scenarios. On the other hand, EGH models require small anisotropies like those observed by BATSE. We consider simple distribution models to determine the generic properties such halos must have to be consistent with the observations and discuss the implications of the corresponding distance scale on burst models.

Subject headings: gamma rays: bursts — stars: neutron — stars: Population II — stars: statistics

Type
Gamma-Ray Bursts and UHE Sources
Copyright
Copyright © The American Astronomical Society 1994

References

Band, D. 1992, ApJ, 400, L63 CrossRefGoogle Scholar
Blaes, O., Blandford, R., Madau, P., & Koonin, S. 1990, ApJ, 363, 612 CrossRefGoogle Scholar
Brainerd, J.J. 1992, Nature, 355, 522 CrossRefGoogle Scholar
Brock, M.N., Meegan, C.A., Fishman, G.J., Wilson, R.B., Paciesas, W.S., & Pendleton, G.N. 1992, in Gamma-Ray Bursts ed. Paciesas, W.S. & Fishman, G.J. (New York: AIP), 399 Google Scholar
Duncan, R.C., Li, H., & Thompson, C. 1993, in AIP Proc. No. 280, Compton Gamma-Ray Observatory, ed. Friedlander, M., Gehreis, N., & Macomb, D.J. (New York: AIP), 1074 Google Scholar
Duncan, R.C., & Thompson, C. 1992, ApJ, 392, L9 CrossRefGoogle Scholar
Eichler, D., & Silk, J. 1992, Science, 257, 937 CrossRefGoogle Scholar
Fabian, A.C., & Podsiadlowski, , 1993, MNRAS, 263, 49 CrossRefGoogle Scholar
Goodman, J. 1986, ApJ, 308, L47 CrossRefGoogle Scholar
Hakkila, J. & Meegan, C.A., 1992a, in Gamma-Ray Bursts, ed. Paciesas, W. S., & Fishman, G.J. (New York: AIP), 120 Google Scholar
Hakkila, J., et al. 1992b, in AIP Conf. Proc. 280, Compton Gamma-Ray Observatory, ed. Friedlander, M., Gehrels, N., & Macomb, D.J. (New York: AIP), 704 Google Scholar
Harding, A. 1991, Phys. Rep., 206, 328 CrossRefGoogle Scholar
Harrison, P.A., Lyne, A.G., & Anderson, B. 1993, MNRAS, 261, 113 CrossRefGoogle Scholar
Hartmann, D.H. 1992, Comm. Astrophys., 16, 231 Google Scholar
Hartmann, D.H., & Epstein, R.I. 1989, ApJ, 346, 960 CrossRefGoogle Scholar
Hartmann, D.H., & The, L.-S. 1993, Ap&SS, 201, 347 Google Scholar
Hartmann, D.H., The, L.-S., Clayton, D.D., Schnepf, N.G., & Linder, E.V. 1992, in Gamma-Ray Bursts, ed. Paciesas, W. S., & Fishman, G.J. (New York: AIP), 120 Google Scholar
Horack, J.M., Meegan, C.A., Fishman, G.J., Wilson, R.B., Paciesas, W.S., Emslie, A.G., Pendleton, G.N., & Brock, M.N. 1993, ApJ, 413, 293 CrossRefGoogle Scholar
Krolik, J.H., & Pier, E.A. 1991, ApJ, 373, 277 CrossRefGoogle Scholar
Li, H., & Dermer, C.D. 1992, Nature, 359, 514 CrossRefGoogle Scholar
Lin, D.N.C., Woosley, S.E., & Bodenheimer, P. 1991, Nature, 353, 827 CrossRefGoogle Scholar
Mao, S., & Paczyński, B. 1992, ApJl, 389, L13 CrossRefGoogle Scholar
Meegan, C. A., et al. 1992a, Nature, 355, 143 CrossRefGoogle Scholar
Meegan, C. A., et al. 1992b, in AIP Conf. Proc. 26S, Proc. Huntsville Gamma-Ray Burst Workshop, ed. Paciesas, W.S. & Fishman, G.J. (New York: AIP), 61 Google Scholar
Meegan, C. A., et al. 1992c, data supplied to the CGRO public access databaseGoogle Scholar
Meegan, C. A., et al. 1992d, IAU Circ., No. 5641 Google Scholar
Mészáros, P., & Rees, M.J. 1992, MNRAS, 257, 29PCrossRefGoogle Scholar
Mészáros, P., & Rees, M.J. 1994, ApJ, submittedGoogle Scholar
Paczyński, B. 1986, ApJ, 308, L51 CrossRefGoogle Scholar
Paczyński, B. 1990, ApJ, 348, 485 CrossRefGoogle Scholar
Paczyński, B. 1991, Acta Astr., 41, 157 Google Scholar
Petrosian, V. 1992, ApJ, 402, L33 CrossRefGoogle Scholar
Piran, T., & Shemi, A. 1993, ApJ, 403, L67 CrossRefGoogle Scholar
Rees, M.J., & Mészáros, P. 1992, MNRAS, 258, 41P CrossRefGoogle Scholar
Shemi, A., & Piran, T. 1990, ApJ, 365, L55 CrossRefGoogle Scholar
Shklovskii, I.S., & Mitrofanov, I.G. 1985, MNRAS, 212, 545 CrossRefGoogle Scholar
Smith, I.A., & Epstein, R.I. 1993, ApJ, 410, 315 CrossRefGoogle Scholar
Wasserman, I. 1992, ApJ, 394, 565 CrossRefGoogle Scholar
Woosley, S.E. 1993, PASP, in pressGoogle Scholar

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Do Gamma-Ray Bursts Originate from an Extended Galactic Halo of High-Velocity Neutron Stars?
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