Korean VLBI Network (KVN)



2015 Seminar List:

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01/23/2015   01/30/2015   02/13/2015   02/27/2015   03/20/2015   04/10/2015   05/08/2015   05/15/2015   05/22/2015   05/29/2015   06/05/2015   06/12/2015   07/03/2015   07/24/2015   07/31/2015   08/07/2015   08/28/2015   09/04/2015   09/18/2015   09/25/2015   10/02/2015   10/30/2015   11/06/2015   11/27/2015  

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Date

11/06/2015

Speaker

Dr. Motoki Kino (Radio Research Group)

Venue

KASI

Title

Fossil shell emission in NGC 1275

Abstract

We study physical properties of a fossil shell associated with fading radio lobes in NGC~1275 (also known as 3C84). In our recent work of Ito et al., we have modeled the dynamical and spectral evolution of fossil shells which are identical to the forward shocks propagating in the external medium and found that the shell emission overwhelms that of the radio lobes soon after stopping the jet energy injection because fresh electrons are continuously supplied into the shell via the forward shock while the radio lobes rapidly fade out without jet energy injection.

By applying the model to NGC~1275, we find that, (i) shocked the thick torus can be detectable by VLBI several ten years after, and (ii) shocked ambient matter can be compatible to the sensitivity of the Cherenkov Telescope Array (CTA).