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Other literature type . 2026
License: CC BY
Data sources: ZENODO
ZENODO
Conference object . 2026
License: CC BY
Data sources: Datacite
ZENODO
Conference object . 2026
License: CC BY
Data sources: Datacite
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Quasi-periodic Jet Precession in the Quasar NRAO 530

Authors: Camus, Mariangella;

Quasi-periodic Jet Precession in the Quasar NRAO 530

Abstract

Jets in active galactic nuclei (AGN) can undergo changes in direction over time, often linked to physical processes near their central supermassive black holes. In this study, we analyze the parsec-scale jet of the quasar NRAO 530 using 160 epochs of VLBI (Very Long Baseline Interferometry) observations at 43 GHz, covering the period from 2007 to 2024. We measured the inner jet apparent position angle (PA) in each epoch and found a quasi-sinusoidal variation with a period of approximately 6.6 years. This period coincides with previously reported timescales of flux variability, suggesting a common origin possibly driven by varying Doppler boosting due to the jet precession. Among the mechanisms that could explain this behavior, we find that Lense-Thirring precession of the tilted accretion disk is the most plausible. By combining the observed precession period with luminosity-based constraints, we narrow down the range of the parameters of the black hole and accretion disk system, including the black hole spin and the precessing disk size.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green