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ORIGINAL RESEARCH article

Front. Astron. Space Sci.
Sec. Cosmology
Volume 11 - 2024 | doi: 10.3389/fspas.2024.1384234
This article is part of the Research Topic

The Dynamic Universe: Realizing the Potential of Time Domain and Multimessenger Astrophysics

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Light Travel Time Effects in Blazar Flares Provisionally Accepted

Justin D. Finke1*
  • 1Naval Research Laboratory, United States

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I present a model for light travel time effects for emission from a plasma blob in a blazar jet. This calculation could be incorporated into more complex models with particle acceleration and radiation mechanisms, but as presented here it is a agnostic as to these mechanisms. This model includes light travel time effects for an expanding or contracting blob. As an example, this model is applied to a flare observed by VERITAS and MAGIC from Mrk 421 in 2013; and to a flare observed by the Fermi Large Area Telescope from 3C 454.3 in 2010.

Keywords: BL Lacertae object: general, BL Lacertae objects: individual (Mrk 421), quasars: general, quasars: individual (3C 454.3), gamma-rays: general, gamma-rays: galaxies, Time-domain astronomy

Received: 08 Feb 2024; Accepted: 13 May 2024.

Copyright: © 2024 Finke. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Mx. Justin D. Finke, Naval Research Laboratory, Washington D.C., United States