English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Periodic outbursts are observed in several changing-look (CL) active galacticnuclei (AGNs). \citet{sniegowska_possible_2020} suggested a model to explainthe repeating CL in these AGNs, where the periodic outbursts are triggered in anarrow unstable zone between an inner ADAF and outer thin disk. In this work,we intend to investigate the effects of large-scale magnetic fields on thelimit cycle behaviors of CL AGNs. The winds driven by magnetic fields cansignificantly change the structure of thin disk by taking away the angularmomentum and energy of the disk. It is found that the period of outburst inrepeating CL AGNs can be substantially reduced by the magnetic fields.Conversely, if we keep the period unchanged, the outburst intensity can beraised for several times. These results can help to explain the observationalproperties of multiple CL AGNs. Besides the magnetic fields, the effects oftransition radius $R_{\rm tr}$, the width of transition zone $\Delta R$ andShakura-Sunyaev parameter $\alpha$ are also explored in this work.

The effects of large-scale magnetic fields on the model for repeating changing-look AGNs