TY - JOUR
T1 - A jet-driven dynamo (JEDD) from jet-inflated bubbles in cooling flows
AU - Soker, Noam
N1 - Publisher Copyright:
© 2017 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - I suggest that the main process that amplifies magnetic fields in cooling flows in clusters and group of galaxies is a jet-driven dynamo (JEDD). The main processes that are behind the JEDD is the turbulence that is formed by the many vortices formed in the inflation processes of bubbles, and the large scale shear formed by the propagating jet. It is sufficient that a strong turbulence exits in the vicinity of the jets and bubbles, just where the shear is large. The typical amplification time of magnetic fields by the JEDD near the jets and bubbles is approximately hundred million years. The amplification time in the entire cooling flow region is somewhat longer. The vortices that create the turbulence are those that also transfer energy from the jets to the intra-cluster medium, by mixing shocked jet gas with the intra-cluster medium gas, and by exciting sound waves. The JEDD model adds magnetic fields to the cyclical behaviour of energy and mass in the jet-feedback mechanism in cooling flows.
AB - I suggest that the main process that amplifies magnetic fields in cooling flows in clusters and group of galaxies is a jet-driven dynamo (JEDD). The main processes that are behind the JEDD is the turbulence that is formed by the many vortices formed in the inflation processes of bubbles, and the large scale shear formed by the propagating jet. It is sufficient that a strong turbulence exits in the vicinity of the jets and bubbles, just where the shear is large. The typical amplification time of magnetic fields by the JEDD near the jets and bubbles is approximately hundred million years. The amplification time in the entire cooling flow region is somewhat longer. The vortices that create the turbulence are those that also transfer energy from the jets to the intra-cluster medium, by mixing shocked jet gas with the intra-cluster medium gas, and by exciting sound waves. The JEDD model adds magnetic fields to the cyclical behaviour of energy and mass in the jet-feedback mechanism in cooling flows.
KW - Dynamo
KW - Galaxies: clusters: intracluster medium
KW - Galaxies: jets
UR - http://www.scopus.com/inward/record.url?scp=85035355015&partnerID=8YFLogxK
U2 - 10.1093/mnras/stx023
DO - 10.1093/mnras/stx023
M3 - 文章
AN - SCOPUS:85035355015
VL - 466
SP - 4776
EP - 4779
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -