Long-term BVR I monitoring of PKS 2155-304 finds significant multi-timescale variability, spectral hardening, a 2023 flare, weak optical-X-ray correlations, and no significant short-term quasi-periodicity once red noise is modelled.
Active Galactic Nuclei - the Physics of Individual Sources and the Cosmic History of Formation and Evolution
1 Pith paper cite this work, alongside 14 external citations. Polarity classification is still indexing.
1
Pith paper citing it
14
external citations · Pith
abstract
In this paper we give a brief review of the astrophysics of active galactic nuclei (AGN). After a general introduction motivating the study of AGNs, we discuss our present understanding of the inner workings of the central engines, most likely accreting black holes with masses between a million and ten billion solar masses. We highlight recent results concerning the jets (collimated outflows) of AGNs derived from X-ray observations (Chandra) of kpc-scale jets and gamma-ray observations of AGNs (Fermi, Cherenkov telescopes) with jets closely aligned with the lines of sight (blazars), and discuss the interpretation of these observations. Subsequently, we summarize our knowledge about the cosmic history of AGN formation and evolution. We conclude with a description of upcoming observational opportunities.
fields
astro-ph.GA 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
PKS 2155-304: Long-Term Optical Photometric Monitoring and Variability Analysis
Long-term BVR I monitoring of PKS 2155-304 finds significant multi-timescale variability, spectral hardening, a 2023 flare, weak optical-X-ray correlations, and no significant short-term quasi-periodicity once red noise is modelled.