24–28 Mar 2025
Florence, Italy
Europe/Rome timezone

Peculiar X-ray properties of MAXI J1631-479 and their understanding

25 Mar 2025, 14:00
30m
Florence, Italy

Florence, Italy

Piazza Adua, 1, 50123 Firenze, Italia

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.

Primary author

Prof. Hitoshi Negoro (Nihon University)

Co-author

Dr Kohei Kobayashi (Nihon University)

Presentation materials