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Dark Matter Mini-halo around the Compact Objects: the Formation, Evolution and Possible Contribution to the Cosmic Ray Electrons/Positrons
Rui-Zhi Yang, Yi-Zhong Fan, Roni Waldman +1
Dark matter particles may be captured by a star and then thermalized in the star's core. At the end of its life a massive star collapses suddenly and a compact object is formed. Th…
GRB 081029: A Gamma-Ray Burst with a Multi-Component Afterglow
Stephen T. Holland, Massimiliano De Pasquale, Jirong Mao +12
We present an analysis of the unusual optical light curve of the gamma-ray burst GRB 081029, a long-soft burst with a redshift of z = 3.8479. We combine X-ray and optical observati…
Very Old Isolated Compact Objects as Dark Matter Probes
Yi-Zhong Fan, Rui-Zhi Yang, Jin Chang
Very old isolated neutron stars and white dwarfs have been suggested to be probes of dark matter. To play such a role, two requests should be fulfilled, i.e., the annihilation lumi…
Are GRB 090423 and Similar bursts due to Superconducting Cosmic strings?
Yu Wang, Yi-Zhong Fan, Da-Ming Wei
Superconducting cosmic strings may be able to power energetic gamma-ray bursts, in particular at high-redshifts (). The ultra-relativistic outflows driven by the superconducti…
Implications of Understanding Short Gamma-Ray Bursts Detected by {\it Swift}
Lang Shao, Zi-Gao Dai, Yi-Zhong Fan +3
In an effort to understand the puzzle of classifying gamma-ray bursts (GRBs), we perform a systematic study of {\it Swift} GRBs and investigate several short GRB issues. Though sho…
Sw 1644+57/GRB 110328A: the physical origin and the composition of the relativistic outflow
Lang Shao, Fu-Wen Zhang, Yi-Zhong Fan +1
Sw 1644+57/GRB 110328A is a remarkable cosmological X-ray outburst detected by the {\it Swift} satellite. Its early-time ( days since the trigger) X-ray emission res…