The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Gamma‐Ray Burst Early Optical Afterglows: Implications for the Initial Lorentz Factor and the Central Engine
Open accessAbstract
Early optical afterglows have been observed from GRB 990123, GRB 021004, and GRB 021211, which reveal rich emission features attributed to reverse shocks. It is expected that Swift will discover many more early afterglows. Here we investigate in a unified manner both the forward and the reverse external shock emission components, and introduce a straightforward recipe for directly constraining the initial Lorentz factor of the fireball using early optical afterglow data. The scheme is largely independent of the shock microphysics. We identify two types of combinations of the reverse and forward-shock emission, and explore their parameter regimes. We also discuss a possible diagnostic for magnetized ejecta. There is evidence that the central engine of GRB 990123 is strongly magnetized.
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Citations
Cites
Spectra and Light Curves of Gamma-Ray Burst Afterglows
Sari, R., Piran, T., & Narayan, R. (1998) · The Astrophysical Journal · doi:10.1086/311269 · Cited by 2,297
Optical and Long‐Wavelength Afterglow from Gamma‐Ray Bursts
Meszaros, P., & Rees, M. J. (1997) · The Astrophysical Journal · doi:10.1086/303625 · Cited by 1,192
Self-citationMillisecond pulsars with extremely strong magnetic fields as a cosmological source of γ-ray bursts
Usov, V. V. (1992) · Nature · doi:10.1038/357472a0 · Cited by 1,037
Observation of contemporaneous optical radiation from a γ-ray burst
Akerlof, C., Balsano, R., Barthelmy, S., Bloch, J., Butterworth, P., Casperson, D., Cline, T., Fletcher, S., Frontera, F., Gisler, G., et al. (1999) · Nature · doi:10.1038/18837 · Cited by 609
Lower Limits on Lorentz Factors in Gamma‐Ray Bursts
Lithwick, Y., & Sari, R. (2001) · The Astrophysical Journal · doi:10.1086/321455 · Cited by 451
Poynting Jets from Black Holes and Cosmological Gamma-Ray Bursts
Mészáros, P., & Rees, M. J. (1997) · The Astrophysical Journal · doi:10.1086/310692 · Cited by 413
Polarization of the prompt γ-ray emission from the γ-ray burst of 6 December 2002
Coburn, W., & Boggs, S. E. (2003) · Nature · doi:10.1038/nature01612 · Cited by 356
GRB 990123: The Optical Flash and the Fireball Model
Sari, R., & Piran, T. (1999) · The Astrophysical Journal · doi:10.1086/312039 · Cited by 356
Hydrodynamic Timescales and Temporal Structure of Gamma-Ray Bursts
Sari, R., & Piran, T. (1995) · The Astrophysical Journal · doi:10.1086/309835 · Cited by 341
Gamma-Ray Burst Environments and Progenitors
Chevalier, R. A., & Li, Z.-Y. (1999) · The Astrophysical Journal · doi:10.1086/312147 · Cited by 335
Cited by
Zhang, B., Fan, Y. Z., Dyks, J., Kobayashi, S., Meszaros, P., Burrows, D. N., Nousek, J. A., & Gehrels, N. (2006) · The Astrophysical Journal · doi:10.1086/500723 · Cited by 1,079
“While the early forward shock synchrotron emission peaks in X-rays at early times, the reverse shock synchrotron emission usually peaks in the optical/IR band or even lower (e.g.,Mészáros & Rees 1997a; Sari & Piran 1999; Kobayashi 2000; Zhang et al. 2003; Zhang&Kobayashi 2005).”
BackgroundInfluentialSelf-citationThe physics of gamma-ray bursts & relativistic jets
Kumar, P., & Zhang, B. (2015) · Physics Reports · doi:10.1016/j.physrep.2014.09.008 · Cited by 952
Self-citationGAMMA-RAY BURSTS: PROGRESS, PROBLEMS & PROSPECTS
ZHANG, B., & MÉSZÁROS, P. (2004) · International Journal of Modern Physics A · doi:10.1142/s0217751x0401746x · Cited by 783
Self-citationGamma-Ray Bursts in the Swift Era
Gehrels, N., Ramirez-Ruiz, E., & Fox, D. B. (2009) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.46.060407.145147 · Cited by 615
Broadband observations of the naked-eye γ-ray burst GRB 080319B
Racusin, J. L., Karpov, S. V., Sokolowski, M., Granot, J., Wu, X. F., Pal’shin, V., Covino, S., van der Horst, A. J., Oates, S. R., Schady, P., et al. (2008) · Nature · doi:10.1038/nature07270 · Cited by 526
Self-citation
Metadata
- Authors
- Zhang, B., Kobayashi, S., & Meszaros, P.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2003-10
- Volume
- 595
- Issue
- 2
- Pages
- 950-954
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2145146974
- Cited by
- 301
- References
- 25
- FWCI
- 13.34
- Type
- journal article
- Language
- en
- Open access
- green
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