your ID: 0142
First Name: Dhruba J. 
Last Name: Saikia  
Affiliation: NCRA, Tata Institute of Fundamental Research, Pune University Campus, India

Title: Episodic activity in radio galaxies 
Authors: D.J. Saikia, C. Konar, M. Jamrozy and J. Machalski 
Topic: 3     
Session: oral    

Abstract:
An important issue concerning active galaxies
is the duration of their AGN phase and whether
such periods of activity are episodic. We present the
results of our study of double-double radio galaxies,
which are striking examples of episodic jet activity using
both the GMRT and the VLA. We illustrate the importance of
multifrequency radio observations across a large wavelength
range to determine the spectral ages of the inner and outer
doubles and constrain models of these sources. We also
discuss fuelling of this episodic activity and the possible
occurrence of misaligned double-double radio sources.