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A Method for Locating High Energy Dissipation Region in Blazar
Dahai Yan, Qingwen Wu, Xuliang Fan +2
The production site of gamma-rays in blazar jet is an unresolved problem. We present a method to locate gamma-ray emission region in the framework of one-zone emission model. From…
Constraints on the location of -ray emitting region for a sample of blazars with radio core-shift measurements
Linhui Wu, Qingwen Wu, Dahai Yan +2
We model simultaneous or quasi-simultaneous multi-band spectral energy distributions (SEDs) for a sample of 25 blazars that have radio core-shift measurements, where a one-zone lep…
The possible submillimeter bump and accretion-jet in the central supermassive black hole of NGC 4993
Qingwen Wu, Jianchao Feng, Xuliang Fan
NGC 4993, as a host galaxy of the electromagnetic counterpart of the first gravitational-wave detection of a binary neutron-star merger, was observed by many powerful telescopes fr…
Determine the Lorentz factor and the viewing angle of GRB 170817A
Yuan-Chuan Zou, Fei-Fei Wang, Reetanjali Moharana +5
GRB 170817A is a weak short gamma-ray burst (GRB) accompanied by the gravitational wave (GW) event GW170817. It is believed, that an off beaming relativistic jet, produces this wea…
The multiwavelength spectrum of NGC 3115: Hot accretion flow properties
Ivan Almeida, Rodrigo Nemmen, Ka-Wah Wong +2
NGC 3115 is the nearest galaxy hosting a billion solar mass black hole and is also a low-luminosity active galactic nucleus (LLAGN). X-ray observations of this LLAGN are able to sp…
Constraint on the black-hole spin of M87 from the accretion-jet model
Jianchao Feng, Qingwen Wu
The millimeter bump, as found in high-resolution multi-waveband observations of M87, most possibly comes from the synchrotron emission of thermal electrons in advection dominated a…