Non-linear variability in microquasars in relation with the winds from their accretion disks

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 accretio...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Janiuk, Agnieszk, Grzedzielski, Mikolaj, Sukova, Petra, Capitanio, Fiamma, Bianchi, Stefano, Kowalski, Wojtek
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
microquasar
accretion disk
oscillations
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167891
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167891
record_format dspace
spelling I19-R120-10915-1678912024-07-08T20:02:06Z http://sedici.unlp.edu.ar/handle/10915/167891 Non-linear variability in microquasars in relation with the winds from their accretion disks Janiuk, Agnieszk Grzedzielski, Mikolaj Sukova, Petra Capitanio, Fiamma Bianchi, Stefano Kowalski, Wojtek 2015-10 2016 2024-07-08T18:04:57Z en Ciencias Astronómicas microquasar accretion disk oscillations 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. Facultad de Ciencias Astronómicas y Geofísicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 55-60
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
microquasar
accretion disk
oscillations
spellingShingle Ciencias Astronómicas
microquasar
accretion disk
oscillations
Janiuk, Agnieszk
Grzedzielski, Mikolaj
Sukova, Petra
Capitanio, Fiamma
Bianchi, Stefano
Kowalski, Wojtek
Non-linear variability in microquasars in relation with the winds from their accretion disks
topic_facet Ciencias Astronómicas
microquasar
accretion disk
oscillations
description 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.
format Objeto de conferencia
Objeto de conferencia
author Janiuk, Agnieszk
Grzedzielski, Mikolaj
Sukova, Petra
Capitanio, Fiamma
Bianchi, Stefano
Kowalski, Wojtek
author_facet Janiuk, Agnieszk
Grzedzielski, Mikolaj
Sukova, Petra
Capitanio, Fiamma
Bianchi, Stefano
Kowalski, Wojtek
author_sort Janiuk, Agnieszk
title Non-linear variability in microquasars in relation with the winds from their accretion disks
title_short Non-linear variability in microquasars in relation with the winds from their accretion disks
title_full Non-linear variability in microquasars in relation with the winds from their accretion disks
title_fullStr Non-linear variability in microquasars in relation with the winds from their accretion disks
title_full_unstemmed Non-linear variability in microquasars in relation with the winds from their accretion disks
title_sort non-linear variability in microquasars in relation with the winds from their accretion disks
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/167891
work_keys_str_mv AT janiukagnieszk nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
AT grzedzielskimikolaj nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
AT sukovapetra nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
AT capitaniofiamma nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
AT bianchistefano nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
AT kowalskiwojtek nonlinearvariabilityinmicroquasarsinrelationwiththewindsfromtheiraccretiondisks
_version_ 1807223583843287040

Ejemplares similares