Stellar Transits across a Magnetized Accretion Torus as a Mechanism for Plasmoid Ejection

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00119134" target="_blank" >RIV/00216224:14310/21:00119134 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/21:00549672

Result on the web

<a href="https://doi.org/10.3847/1538-4357/ac05c6" target="_blank" >https://doi.org/10.3847/1538-4357/ac05c6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ac05c6" target="_blank" >10.3847/1538-4357/ac05c6</a>

Result language

angličtina

Original language name

Stellar Transits across a Magnetized Accretion Torus as a Mechanism for Plasmoid Ejection

Original language description

The close neighborhood of a supermassive black hole contains not only the accreting gas and dust but also stellar-sized objects, such as late-type and early-type stars and compact remnants that belong to the nuclear star cluster. When passing through the accretion flow, these objects perturb it by the direct action of stellar winds, as well as their magnetic and gravitational effects. By performing general-relativistic magnetohydrodynamic simulations, we investigate how the passages of a star can influence the supermassive black hole gaseous environment. We focus on the changes in the accretion rate and the emergence of blobs of plasma in the funnel of an accretion torus. We compare results from 2D and 3D numerical computations that have been started with comparable initial conditions. We find that a quasi-stationary inflow can be temporarily inhibited by a transiting star, and the plasmoids can be ejected along the magnetic field lines near the rotation axis. We observe the characteristic signatures of the perturbing motion in the power spectrum of the accretion variability, which provides an avenue for a multi-messenger detection of these transient events. Finally, we discuss the connection of our results to multiwavelength observations of galactic nuclei, with the emphasis on ten promising sources (Sgr A*, OJ 287, J0849+5108, RE J1034+396, 1ES 1927+65, ESO 253–G003, GSN 069, RX J1301.9+2747, eRO-QPE1, and eRO-QPE2).

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

917

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

31

Pages from-to

„43“

UT code for WoS article

000684706900001

EID of the result in the Scopus database

2-s2.0-85113366478