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 enhanced periodically
every $sim 8.3$ days. The repetitive nature of the ultrafast outflow is
tentatively explained by an orbiting massive perturber, possibly an
intermediate-mass black hole (IMBH), trajectory of which is inclined with
respect to the accretion flow around the primary supermassive black hole
(SMBH). In this scenario, 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 (a.k.a. QPOuts) are thus a novel
phenomenon that can help reveal new extreme-/intermediate-mass ratio inspiral
(EMRI/IMRI) candidates. These then would be prime candidate sources for a
simultaneous detection and monitoring in electromagnetic as well as
gravitational wave domains.
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