Non-linear variability in microquasars in relation with the winds from their accretion disks
Date Issued
2016
Author(s)
Janiuk, Agnieszka
•
Grzedzielski, Mikolaj
•
Sukova, Petra
•
•
BIANCHI, STEFANO
•
Kowalski, Wojtek
Abstract
The microquasar IGR J17091-3624, which is the recently discovered analogue of
the well known source GRS 1915+105, exhibits quasi-periodic outbursts, with a
period of 5-70 seconds, and regular amplitudes, referred to as "heartbeat
state". We argue that these states are plausibly explained by accretion disk
instability, driven by the dominant radiation pressure. Using our GLobal
Accretion DIsk Simulation hydrodynamical code, we model these outbursts
quantitatively. We also find a correlation between the presence of massive
outflows launched from the accretion disk and the stabilization of its
oscillations. We verify the theoretical predictions with the available timing
and spectral observations.
Furthermore, we postulate that the underlying non-linear differential
equations that govern the evolution of an accretion disk are responsible for
the variability pattern of several other microquasars, including XTE J1550-564,
GX 339-4, and GRO J1655-40. This is based on the signatures of deterministic
chaos in the observed lightcurves of these sources, which we found using the
recurrence analysis method. We discuss these results in the frame of the
accretion disk instability model.
Coverage
High-Energy Phenomena in Relativistic Outflows V Proceedings
All editors
Pellizza, Leonardo J.; Romero, Gustavo E.
Start page
55
Conferenece
High-Energy Phenomena in Relativistic Outflows V
Conferenece place
La Plata, Argentina
Conferenece date
5-8 October, 2015
Ads BibCode
2016arXiv160402888J
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
workshop_series_vol8.pdf
Description
Pdf editoriale
Size
35.17 MB
Format
Adobe PDF
Checksum (MD5)
3ff186062d22eeb71eab81f50f328343
Loading...
Name
55-58_workshop_series_vol8.pdf
Description
Pdf editoriale
Size
339.66 KB
Format
Adobe PDF
Checksum (MD5)
57e8b48e5a58a8c44b358a767e220613