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

We present a study of the parsec-scale multi-frequency properties of thequasar S4 1030+61 during a prolonged radio and gamma-ray activity. Observationswere performed within Fermi gamma-ray telescope, OVRO 40-m telescope and MOJAVEVLBA monitoring programs, covering five years from 2009. The data aresupplemented by four-epoch VLBA observations at 5, 8, 15, 24, and 43 GHz, whichwere triggered by the bright gamma-ray flare, registered in the quasar in 2010.The S4 1030+61 jet exhibits an apparent superluminal velocity of (6.4+-0.4)cand does not show ejections of new components in the observed period, whiledecomposition of the radio light curve reveals nine prominent flares. Themeasured variability parameters of the source show values typical forFermi-detected quasars. Combined analysis of radio and gamma-ray emissionimplies a spatial separation between emitting regions at these bands of about12 pc and locates the gamma-ray emission within a parsec from the centralengine. We detected changes in the value and direction of the linearpolarization and the Faraday rotation measure. The value of the intrinsicbrightness temperature of the core is above the equipartition state, while itsvalue as a function of distance from the core is well approximated by thepower-law. Altogether these results show that the radio flaring activity of thequasar is accompanied by injection of relativistic particles and energy lossesat the jet base, while S4 1030+61 has a stable, straight jet well described bystandard conical jet theories.

Multi-wavelength observations of the gamma-ray flaring quasar S4 1030+61 in 2009-2014