Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni

Accretion of matter onto black holes is universally associated with strong radiative feedback and powerful outflows. In particular, black-hole transients have outflows whose properties are strongly coupled to those of the accretion flow. This includes X-ray winds of ionized material, expelled from t...

Description complète

Détails bibliographiques
Auteurs principaux: Muñoz-Darias, T, Casares, J, Mata Sánchez, D, Fender, R, Armas Padilla, M, Linares, M, Ponti, G, Charles, P, Mooley, K, Rodriguez, J
Format: Journal article
Langue:English
Publié: Nature Publishing Group 2016
_version_ 1826290516534231040
author Muñoz-Darias, T
Casares, J
Mata Sánchez, D
Fender, R
Armas Padilla, M
Linares, M
Ponti, G
Charles, P
Mooley, K
Rodriguez, J
author_facet Muñoz-Darias, T
Casares, J
Mata Sánchez, D
Fender, R
Armas Padilla, M
Linares, M
Ponti, G
Charles, P
Mooley, K
Rodriguez, J
author_sort Muñoz-Darias, T
collection OXFORD
description Accretion of matter onto black holes is universally associated with strong radiative feedback and powerful outflows. In particular, black-hole transients have outflows whose properties are strongly coupled to those of the accretion flow. This includes X-ray winds of ionized material, expelled from the accretion disk encircling the black hole, and collimated radio jets. Very recently, a distinct optical variability pattern has been reported in the transient stellar-mass black hole V404 Cygni, and interpreted as disrupted mass flow into the inner regions of its large accretion disk. Here we report observations of a sustained outer accretion disk wind in V404 Cyg, which is unlike any seen hitherto. We find that the outflowing wind is neutral, has a large covering factor, expands at one per cent of the speed of light and triggers a nebular phase once accretion drops sharply and the ejecta become optically thin. The large expelled mass (>10(-8) solar masses) indicates that the outburst was prematurely ended when a sizeable fraction of the outer disk was depleted by the wind, detaching the inner regions from the rest of the disk. The luminous, but brief, accretion phases shown by transients with large accretion disks imply that this outflow is probably a fundamental ingredient in regulating mass accretion onto black holes.
first_indexed 2024-03-07T02:45:23Z
format Journal article
id oxford-uuid:abe0a85d-e1c4-456d-a0eb-9eb8b6b6a12d
institution University of Oxford
language English
last_indexed 2024-03-07T02:45:23Z
publishDate 2016
publisher Nature Publishing Group
record_format dspace
spelling oxford-uuid:abe0a85d-e1c4-456d-a0eb-9eb8b6b6a12d2022-03-27T03:24:57ZRegulation of black-hole accretion by a disk wind during a violent outburst of V404 CygniJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:abe0a85d-e1c4-456d-a0eb-9eb8b6b6a12dEnglishSymplectic Elements at OxfordNature Publishing Group2016Muñoz-Darias, TCasares, JMata Sánchez, DFender, RArmas Padilla, MLinares, MPonti, GCharles, PMooley, KRodriguez, JAccretion of matter onto black holes is universally associated with strong radiative feedback and powerful outflows. In particular, black-hole transients have outflows whose properties are strongly coupled to those of the accretion flow. This includes X-ray winds of ionized material, expelled from the accretion disk encircling the black hole, and collimated radio jets. Very recently, a distinct optical variability pattern has been reported in the transient stellar-mass black hole V404 Cygni, and interpreted as disrupted mass flow into the inner regions of its large accretion disk. Here we report observations of a sustained outer accretion disk wind in V404 Cyg, which is unlike any seen hitherto. We find that the outflowing wind is neutral, has a large covering factor, expands at one per cent of the speed of light and triggers a nebular phase once accretion drops sharply and the ejecta become optically thin. The large expelled mass (>10(-8) solar masses) indicates that the outburst was prematurely ended when a sizeable fraction of the outer disk was depleted by the wind, detaching the inner regions from the rest of the disk. The luminous, but brief, accretion phases shown by transients with large accretion disks imply that this outflow is probably a fundamental ingredient in regulating mass accretion onto black holes.
spellingShingle Muñoz-Darias, T
Casares, J
Mata Sánchez, D
Fender, R
Armas Padilla, M
Linares, M
Ponti, G
Charles, P
Mooley, K
Rodriguez, J
Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title_full Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title_fullStr Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title_full_unstemmed Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title_short Regulation of black-hole accretion by a disk wind during a violent outburst of V404 Cygni
title_sort regulation of black hole accretion by a disk wind during a violent outburst of v404 cygni
work_keys_str_mv AT munozdariast regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT casaresj regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT matasanchezd regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT fenderr regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT armaspadillam regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT linaresm regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT pontig regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT charlesp regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT mooleyk regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni
AT rodriguezj regulationofblackholeaccretionbyadiskwindduringaviolentoutburstofv404cygni