Kavli Affiliate: Dheeraj R. Pasham
| First 5 Authors: Michal Zajaček, Petra Suková, Vladimír Karas, Dheeraj R. Pasham, Francesco Tombesi
| Summary:
The first detection of the quasiperiodic ultrafast outflow in the ASASSN-20qc
system was reported by Pasham et al. (2024). The outflow is revealed in the
soft X-ray spectra as an absorption feature, which is periodically enhanced
every $ sim 8.3$ days. The periodic nature of the ultrafast outflow is best
explained by an orbiting massive perturber, most likely an intermediate-mass
black hole (IMBH), that is inclined with respect to the accretion flow around
the primary supermassive black hole (SMBH). In this way, the orbiting body
pushes the disc gas into the outflow funnel, where it is accelerated by the
ordered magnetic field (Sukov’a et al. 2021). Quasiperiodic ultrafast outflows
(QPOuts) are thus a novel phenomenon that can help reveal new
extreme-/intemediate-mass ratio inspiral (EMRI/IMRI) candidates that otherwise
do not exhibit significant periodic patterns in the continuum flux density.
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