Title：Supersoft Ultraluminous X-ray Sources

Speaker：Professor Hua Feng
Unit：Tsinghua University
Time：2016.12.07（Wednesday） 14:30
Place：Physics Building 573, Haiyun Campus, Xiamen University
Abstract： Ultraluminous X-ray sources (ULXs) are non-nuclear objects found in external galaxies that appear to be very luminous under the assumption of isotropic emission. X-ray spectroscopic and timing studies suggest a new accretion state distinct from those seen in Galactic stellar-mass black hole binaries. I will focus on a sub-class of ULXs whose X-ray spectra are dominated by soft thermal emission. These supersoft ULXs show similar spectral and temporal behaviors and may define a new emission state with an even higher accretion rate compared with standard ULXs.