Version 1
: Received: 18 July 2023 / Approved: 18 July 2023 / Online: 19 July 2023 (04:15:17 CEST)
How to cite:
Yuan, Y. Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar. Preprints2023, 2023071276. https://doi.org/10.20944/preprints202307.1276.v1
Yuan, Y. Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar. Preprints 2023, 2023071276. https://doi.org/10.20944/preprints202307.1276.v1
Yuan, Y. Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar. Preprints2023, 2023071276. https://doi.org/10.20944/preprints202307.1276.v1
APA Style
Yuan, Y. (2023). Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar. Preprints. https://doi.org/10.20944/preprints202307.1276.v1
Chicago/Turabian Style
Yuan, Y. 2023 "Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar" Preprints. https://doi.org/10.20944/preprints202307.1276.v1
Abstract
In this article, we introduce some multi-messenger studies of blazars.
Main contents contain the following parts, 1. the subclasses of blazars and the observational characteristics, 2. emission variabilities from the multi-messenger observations, 3. the physical origin for the multi-messenger studies.
Based on mid-IR observations collected from the $WISE$ database, we collect two sources (BZQ J1700+6830 and BZQ J1842+6809) to analyze the mid-IR variabilities. \\
(1) For BZQ J1700+6830, the period is $P\approx$ 42 hr at the four bands ($W1$, $W2$, $W3$, $W4$); for BZQ J1842+6809, the period is $P\approx$ 123 hr at the two bands ($W1$, $W2$). \\
(2) Using the periodicities, we calculate that the central black hole mass ($BH$) should be $M = (5.44\sim33.0)\times10^8M_{\odot}$ for BZQ J1700+6830 and $M = (1.13\sim6.88)\times10^9M_{\odot}$ for BZQ J1842+6809.\\
(3) For the two sources, during the flaring stage, we find anti-clockwise variation trends based on the time-based relations built by the spectral indices ($\alpha$) and flux densities ($F$).\\
(4) We calculate the Doppler factor ($\delta$) when the sources are in the dimming or brightening stages, and find that with the frequency increasing, the Doppler factor become stronger.
Keywords
galaxies; blazars; multi-messenger studies; generally
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
