Work

Quasi-periodic outflows from star-disc interaction

Year: 2024

Type: article

Abstract: Recently, a previously quiescent nearby galactic nucleus, ASASSN-20qc, went to an outburst during which it has shown quasioperiodic ultra-fast outflows (qUFOs) with changing column density every cca 8 days. Different physical mechanisms have been proposed to explain such behaviour, with the most promising scenario being the smaller, probably intermediate-mass black hole, orbiting the primary supermassive black hole at the distance of about a hundred gravitational radii of the primary. The secondary black hole is punching through the accretion flow launching fast outflowing blobs of gas (∼ 0.3c), which are causing repeating absorption events. We will examine the potential launching mechanisms of UFOs and show GRMHD simulation for the SMRI (Small Mass Ratio Inspiral) scenario. We will discuss the importance of observing UFOs and their variability in large sky surveys.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.14097940

Authors: Suková, Petra, Michal, Zajaček, Vladimír, Karas, Dheeraj, Pasham, Francesco, Tombesi

Institutions: Czech Academy of Sciences, Astronomical Institute, Masaryk University, Massachusetts Institute of Technology, University of Rome Tor Vergata

Language: English

Topic: Astrophysical Phenomena and Observations

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Grantová Agentura České Republiky

Award: Stars in galactic nuclei: interrelation with massive black holes