共查询到4条相似文献，搜索用时 0 毫秒
1.
C. Konar M. Jamrozy M. J. Hardcastle J. H. Croston S. Nandi D. J. Saikia J. Machalski 《Journal of Astrophysics and Astronomy》2011,32(4):477-486
Relativistic and magnetized plasma ejected by radio loud AGNs through jets form the diffuse lobes of radio galaxies. The radiating
particles (electron/electron–positron) in lobes emit in radio via the synchrotron process and X-ray via inverse-Compton scattering
of cosmic microwave background photons. The thermal environment around radio galaxies emits X-rays via the thermal bremsstrahlung
process. By combining information from these processes we can measure physical conditions in and around the radio lobes and
thus study the dynamics of radio galaxies, including double–double radio galaxies. 相似文献
2.
V. G. Surdin 《Astrophysics and Space Science》1991,183(1):129-134
Four pairs of visual double star clusters with the lowest mass-to-luminosity ratio have been selected among globular clusters of our Galaxy. By taking into accounts the effects of dynamical friction and compressive gravitational shocks, we conclude that the probability for the pairs to be gravitationally bound is very low. 相似文献
3.
M. Jamrozy D. Kozieł-Wierzbowska S. Zoła A. Kuźmicz J. Machalski 《Journal of Astrophysics and Astronomy》2011,32(4):467-470
J1159+5820 is an extended radio galaxy with a quite unusual morphology, featuring two pairs of radio lobes. Such sources,
called double–double radio galaxies, constitute a very rare class of extragalactic radio sources. Furthermore, the extended
radio structure of this source shows an X-shape form. According to a much likely scenario, such a morphology is due to interrupting
nuclear activity in its central active galactic nucleus. Interestingly, the host of this source is a near-distance bright
galaxy named CGCG 292-057, which is clearly disturbed, with tidal features and shells as plausible signs of a recent merger. 相似文献
4.
Ruta Kale K. S. Dwarakanath Joydeep Bagchi Surajit Paul 《Journal of Astrophysics and Astronomy》2011,32(4):533-536
The case of spectacular ring-like double radio relics in the merging, rich galaxy cluster A3376 is of great interest to study
non-thermal phenomena at cluster outskirts. We present the first low frequency (330 and 150 MHz) images of the double relics
using the GMRT. With our GMRT 330 MHz map and the VLA 1400 MHz map (Bagchi et al. 2006), we have constructed and analyzed the distribution of spectral indices over the radio relics. We find flat spectral
indices at the outer edges of both the relics and a gradual steepening of spectral indices toward the inner regions. This
supports the model of outgoing merger shock waves. The eastern relic has a complex morphology and spectral index distribution
toward the inner region. This will be discussed in the context of the effect of large-scale accretion flows on the outgoing
merger shocks as reported in the recent simulations. 相似文献