Discovering the Mass-Scaled Damping Timescale from Microquasars to Blazars
The Astrophysical Journal Letters(2024)
摘要
Studying the variability of the accretion disks of black holes and jets is
important to identify their internal physical processes. In this letter, we
obtain the characteristic damping timescale of 34 blazars and seven
microquasars from the Fermi-Large Area Telescope and the XMM-Newton X-ray
telescope, respectively. We found that the mass-scaled characteristic
timescales, ranging from the microquasars of stellar-mass black holes to the
blazars of supermassive black holes, exhibited a linear relationship with a
slope of ∼0.57. Given the fact the damping timescales of the γ-ray
in the blazars are associated with the jet, we propose that the timescales of
the X-ray in these microquasars are also related with the jet. The mass-scaled
damping timescale that we found was consistent with the radiation of the
optical accretion disk. This can be attributed to the viscous timescale at the
ultraviolet-emitting radii of the disk, which can affect the jet. Our study
provides a new perspective on the origin of the region of radiation and the
possible disk–jet connection based on time-domain analysis.
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关键词
Blazars,Astronomical methods,Galaxy accretion disks,Galaxy jets
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