Chinese astronomers have performed a gamma-ray and optical variability evaluation of the blazar 3FGL J0449.4-4350. The new analysis, featured in a paper featured on March 25 on arXiv.org, describes the detection of potential quasi-periodic oscillation (QPO) from the source and offers more insights into the origin of such behavior.
Blazars are very compact quasars related to supermassive black holes on the centers of active, giant elliptical galaxies, and may exhibit variability on a variety of timescales. They belong to a bigger group of active galaxies that host active galactic nuclei (AGN), and their attribute features are relativistic jets pointed nearly exactly toward the Earth.
Based on their optical emission properties, astronomers split blazars into two classes: flat-spectrum radio quasars (FSRQs) that function prominent and broad optical emission strains, and BL Lacertae objects (BL Lacs), which don’t.
At a redshift of 0.205, 3FGL J0449.4-4350 is a BL Lac recognized to showcase variability in optical band and gamma-rays. In particular, observations present that its optical band and gamma-ray flux synchronously change. Due to this fact, long-time period monitoring is crucial for understanding the typical behavior of this source.
Just lately, a group of astronomers headed by Xing Yang of Yunnan Normal University, China, has carried out a time series evaluation of the light curves of 3FGL J0449.4-4350. Yang’s team has combed by the archival data from the Catalina Real-time Transient Survey (CRTS) and NASA’s Fermi spacecraft, aiming to shine more light on the variability of this object.