| Issue |
A&A
Volume 660, April 2022
|
|
|---|---|---|
| Article Number | A58 | |
| Number of page(s) | 8 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361/202141972 | |
| Published online | 12 April 2022 | |
Opacity effect on core-shift and the spectral properties of jets
1
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
e-mail: richa.sharma110393@gmail.com
2
INAF – Osservatorio Astrofisico di Arcetri, L.go E. Fermi 5, Firenze, Italy
Received:
5
August
2021
Accepted:
27
January
2022
Context. There is theoretical and observational evidence that the jet core position changes with frequency. However, the core position for a given frequency may vary with time in the case of flares or for a precessing jet.
Aims. In this work, we want to explore the changes in core position as a function of frequency, magnetic field alignment, relativistic electron density, and jet inclination angle.
Methods. We use a physical model of a synchrotron-emitting jet. Two cases of the jet are analysed, namely with magnetic field parallel and perpendicular to the jet axis. The evolution of the related spectrum is monitored over the radio band.
Results. We find that a smaller jet inclination angle or a higher electron density causes the jet core position to move downstream of the jet and we demonstrate that this displacement of the core along the jet gives rise to a spectral flattening.
Key words: opacity / astrometry / stars: jets / galaxies: jets / radio continuum: general / black hole physics
© R. Sharma et al. 2022
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Open Access funding provided by Max Planck Society.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.