Speaker
Prof.
Hitoshi Negoro
(Nihon University)
Description
MAXI J1631-479 is a bright black hole X-ray transient discovered in 2018. MAXI-GSC and Swift-XRT data does not show a typical q-shape but an inverse Y-shape in the hardness and intensity diagram (HID) during the course of the outburst. Using MAXI and Swift data, we demonstrate such an inverse Y-shape and observed various states, low/hard, hard and soft intermediate, and high/soft states, are naturally explained by current accretion disk models. We also point out and discuss other peculiar properties commonly observed in such inverse Y-shape sources, e.g., MAXI J1535-571, from MAXI and Swift observations.
Author
Prof.
Hitoshi Negoro
(Nihon University)
Co-author
Dr
Kohei Kobayashi
(Nihon University)
