1999/03/23 by G. Neugebauer, K. Matthews · 2 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.1086/300945
AAS LaTex, 33 figures in 2 postscript files, AJ, accepted
arxiv created 1999/03/23 · openalex publication_date 1999/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Twenty-five low-redshift quasars have been monitored for several decades at five near- and midinfrared wavelengths to detect rapid variations that would indicate that a nonthermal component was present in the "10 μm bump." Such variability has apparently been detected in several radio-loud quasars and in the radio-quiet quasar PG 1535+547. In addition, the structure function of PG 1226+023 shows that an apparently periodic component is present in its near-infrared emission.