TY - JOUR
T1 - Large kinetic power in FRII radio jets
AU - Ito, Hirotaka
AU - Kino, Motoki
AU - Kawakatu, Nozomu
AU - Isobe, Naoki
AU - Yamada, Shoichi
N1 - Funding Information:
Acknowledgements This work was partially supported by the Grants-in-Aid for the Scientific Research (14740166, 14079202) from Ministry of Education, Science and Culture of Japan and by Grants-in-Aid for the 21th century COE program “Holistic Research and Education Center for Physics of Self-organizing Systems”. This research has made use of SAOimage DS9, developed by Smithsonian Astrophysical Observatory.
PY - 2007/10
Y1 - 2007/10
N2 - We investigate the total kinetic powers (L j) and ages (t age) of powerful jets of four FR II radio sources (Cygnus A, 3C 223, 3C 284, and 3C 219) by the detail comparison of the dynamical model of expanding cocoons with observed ones. It is found that these sources have quite large kinetic powers with the ratio of L j to the Eddington luminosity (L Edd) resides in 0.02<L j/L Edd<10. Reflecting the large kinetic powers, we also find that the total energy stored in the cocoon (E c) exceed the energy derived from the minimum energy condition (E min∈): 2<E c/E min∈<160. This implies that a large amount of kinetic power is carried by invisible components such as thermal leptons (electron and positron) and/or protons.
AB - We investigate the total kinetic powers (L j) and ages (t age) of powerful jets of four FR II radio sources (Cygnus A, 3C 223, 3C 284, and 3C 219) by the detail comparison of the dynamical model of expanding cocoons with observed ones. It is found that these sources have quite large kinetic powers with the ratio of L j to the Eddington luminosity (L Edd) resides in 0.02<L j/L Edd<10. Reflecting the large kinetic powers, we also find that the total energy stored in the cocoon (E c) exceed the energy derived from the minimum energy condition (E min∈): 2<E c/E min∈<160. This implies that a large amount of kinetic power is carried by invisible components such as thermal leptons (electron and positron) and/or protons.
KW - Radio galaxies: individual (Cygnus A, 3C 223, 3C 284, 3C 219)
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U2 - 10.1007/s10509-007-9539-z
DO - 10.1007/s10509-007-9539-z
M3 - Article
AN - SCOPUS:35248868307
SN - 0004-640X
VL - 311
SP - 335
EP - 339
JO - Astrophysics and Space Science
JF - Astrophysics and Space Science
IS - 1-3
ER -