TY  - JOUR
AU  - Yuan, Chengchao
AU  - Winter, Walter
AU  - Zhang, B. Theodore
AU  - Murase, Kohta
AU  - Zhang, Bing
TI  - Revisiting X-ray Afterglows of Jetted Tidal Disruption Events with the External Reverse Shock
JO  - The astrophysical journal / Part 1
VL  - 982
IS  - 2
SN  - 0004-637X
CY  - London
PB  - Institute of Physics Publ.
M1  - PUBDB-2024-06650
M1  - arXiv:2411.07925
M1  - arXiv:2411.07925
SP  - 196 
PY  - 2024
N1  - 10 pages, 3 figures, 1 table. Comments are welcome
AB  - We investigate the external reverse shock region of relativistic jets as the origin of X-ray afterglows of jetted tidal disruption events (TDEs) that exhibit luminous jets accompanied by fast-declining non-thermal X-ray emissions. We model the dynamics of jet propagating within an external density medium, accounting for continuous energy injection driven by accretion activities. We compute the time-dependent synchrotron and inverse Compton emissions from the reverse shock region. Our analysis demonstrates that the reverse shock scenario can potentially explain the X-ray light curves and spectra of four jetted TDEs, AT 2022cmc, Swift J1644, Swift J2058, and Swift J1112. Notably, the rapid steepening of the late-stage X-ray light curves can be attributed jointly to the jet break and cessation of the central engine as the accretion rate drops below the Eddington limit. Using parameters obtained from X-ray data fitting, we also discuss the prospects for γ-ray and neutrino detection.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001456037200001
DO  - DOI:10.3847/1538-4357/adbbde
UR  - https://bib-pubdb1.desy.de/record/617191
ER  -