Accretion disk wind during the outburst of the stellar-mass black hole MAXI J1348-630
Abstract
We analyzed two observations of the low-mass black hole X-ray binary MAXI J1348-630 from Nuclear Spectroscopic Telescope Array (NuSTAR) during low hard state and hard intermediate state in the 2019 outburst. The reflection components are found in the X-ray spectra, and the spectral fittings give an inclination angle of ∼25∘ -35∘ for the binary system, and there is an absorption line around ∼7 keV coming from highly ionized iron. The photoionization code XSTAR is used to fit the absorption line, which is attributed to outflows with a velocity of ∼104kms-1 along our line of sight and the column density reaching 1023cm-2 in low hard and hard intermediate states. The physical mechanism launching fast disk winds from the black hole accretion system is still uncertain. These observations strongly support magnetic launching as the dominant mechanism which drives the high velocity, high ionization winds from the inner accretion disk region in hard and hard intermediate states of MAXI J1348-630.
- Publication:
-
Journal of High Energy Astrophysics
- Pub Date:
- March 2023
- DOI:
- 10.1016/j.jheap.2022.12.001
- Bibcode:
- 2023JHEAp..37...25W
- Keywords:
-
- Accretion;
- Accretion disks;
- Black hole physics;
- Line: profiles;
- X-rays: individual (MAXI J1348-630)