High energy Millihertz quasi-periodic oscillations in 1A 0535+262 with Insight-HXMT challenge current models

Ruican Ma, Lian Tao, Shuang-Nan Zhang +21

We studied the millihertz quasi-periodic oscillation (mHz QPO) in the 2020 outburst of the Be/X-ray binary 1A 0535+262 using Insight-HXMT data over a broad energy band. The mHz QPO…