5 papers
Dynamical Age vs Spectral Age of the Lobes of Selected Giant Radio Sources (GRSs)
J. Machalski, M. Jamrozy, D. J. Saikia
Dynamical ages of the opposite lobes determined {\sl independently} of each other suggest that their ratios are between 1.1 to 1.4. Demanding similar values of the jet…
A Multifrequency Study of Double-Double Radio Galaxies
M. Jamrozy, C. Konar, D. J. Saikia +1
One of the striking examples of episodic activity in active galactic nuclei are the double-double radio galaxies (DDRGs) with two pairs of oppositely-directed radio lobes from two…
Spectral Ages of Giant Radio Sources
C. Konar, D. J. Saikia, M. Jamrozy +1
Multifrequency observations with the GMRT and the VLA are used to determine the spectral breaks in consecutive strips along the lobes of a sample of selected giant radio sources (G…
Possible Relic Lobes in Giant Radio Sources
S. Godambe, C. Konar, D. J. Saikia +1
We present low-frequency observations with the GMRT of three giant radio sources (J0139+3957, J0200+4049 and J0807+7400) with relaxed diffuse lobes which show no hotspots and no ev…
21-cm absorbers at intermediate redshifts
N. Gupta, R. Srianand, P. Petitjean +2
Damped Lyman-alpha systems (DLAs) seen in the spectra of high-z QSOs allow us to probe the physical conditions in protogalaxies. Our understanding of physical conditions in DLAs at…