SIMBAD references

2025ApJ...985..239Y - Astrophys. J., 985, 239 (2025/June-1)

Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet.

YI S.-X., WANG C.-W., SHAO X., MORADI R., GAO H., ZHANG B., XIONG S.-L., ZHANG S.-N., TAN W.-J., LIU J.-C., XUE W.-C., ZHANG Y.-Q., ZHENG C., WANG Y., ZHANG P., AN Z.-H., CAI C., FENG P.-Y., GONG K., GUO D.-Y., HUANG Y., LI B., LI X.-B., LI X.-Q., LIU X.-J., LIU Y.-Q., MA X., PENG W.-X., QIAO R., SONG L.-M., WANG J., WANG P., WANG Y., WEN X.-Y., XIAO S., XU Y.-B., YANG S., YI Q.-B., ZHANG D.-L., ZHANG F., ZHANG H.-M., ZHANG J.-P., ZHANG Z., ZHAO X.-Y., ZHAO Y. and ZHENG S.-J.

Abstract (from CDS):

The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity. Here we demonstrate that the rapidly variable components of its prompt emission compose an overall broad single pulse-like profile. Although these individual rapid components are aligned in time across all energy bands, this overall profile conspires to show a well-defined energy-dependent behavior that is typically seen in single GRB pulses. Such a feature demonstrates that the prompt emission of this burst is from many individual emitting units that are casually linked in a emission site at a large distance from the central engine. Such a scenario is in natural consistency with the internal-collision-induced magnetic reconnection and turbulence framework, which invokes many minijets due to local magnetic reconnection that constantly appear and disappear in a global magnetically dominated jet.

Journal keyword(s): Gamma-ray bursters - Gamma-ray transient sources

Simbad objects: 1

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