The jet-disk symbiosis without maximal jets: 1-D hydrodynamical jets revisited
Abstract
In this work we discuss the recent criticism by Zdziarski of the maximal jet model derived in Falcke & Biermann (1995). We agree with Zdziarski that in general a jet's internal energy is not bounded by its rest-mass energy density. We describe the effects of the mistake on conclusions that have been made using the maximal jet model and show when a maximal jet is an appropriate assumption. The maximal jet model was used to derive a 1-D hydrodynamical model of jets in agnjet, a model that does multiwavelength fitting of quiescent/hard state X-ray binaries and low-luminosity active galactic nuclei. We correct algebraic mistakes made in the derivation of the 1-D Euler equation and relax the maximal jet assumption. We show that the corrections cause minor differences as long as the jet has a small opening angle and a small terminal Lorentz factor. We find that the major conclusion from the maximal jet model, the jet-disk symbiosis, can be generally applied to astrophysical jets. We also show that isothermal jets are required to match the flat radio spectra seen in low-luminosity X-ray binaries and active galactic nuclei, in agreement with other works.
Keywords
Cite
@article{arxiv.1703.02842,
title = {The jet-disk symbiosis without maximal jets: 1-D hydrodynamical jets revisited},
author = {Patrick Crumley and Chiara Ceccobello and Riley M. T. Connors and Yuri Cavecchi},
journal= {arXiv preprint arXiv:1703.02842},
year = {2017}
}
Comments
7 pages, accepted by A&A