2021ApJ...911..127S -
Astrophys. J., 911, 127-127 (2021/April-3)
Spectro-temporal studies of rapid transition of the quasi-periodic oscillations in the black hole source H1743-322.
SRIRAM K., HARIKRISHNA S. and CHOI C.S.
Abstract (from CDS):
An appearance or disappearance of quasi-periodic oscillations (QPOs) associated with the variation of X-ray flux can be used to decipher the accretion-ejection mechanism of black hole X-ray sources. We searched for and studied such rapid transitions in H1743-322 using archival data from the Rossi X-ray Timing Explorer and found eight such events, where a QPO vanishes suddenly along with the variation of X-ray flux. The appearance/disappearance of QPOs was associated with four events exhibiting type-B QPOs at ∼4.5 Hz: one was a type-A QPO at ν ∼ 3.5 Hz, and the other three were connected to type-C QPOs at ∼9.5 Hz. Spectral studies of the data revealed that the inner disk radius remained at the same location around 2-9 rg, depending on the model used, but power-law indices were varying, indicating that either a corona or a jet is responsible for the events. The probable ejection radii of coronas were estimated to be around 4.2-15.4 rg based on the plasma ejection model. Our X-ray and quasi-simultaneous radio correlation studies suggest that the type-B QPOs are probably related to the precession of a weak jet, though a small and weak corona is present at its base, and the type-C QPOs are associated with the base of a relatively strong jet, which is acting like a corona.
Abstract Copyright:
© 2021. The American Astronomical Society. All rights reserved.
Journal keyword(s):
Low-mass x-ray binary stars
Simbad objects:
11
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2021ApJ...911..127S and select 'bookmark this link' or equivalent in the popup menu