HI gas in rejuvenated radio galaxies: GMRT observations of the DDRG J1247+6723
arXiv:astro-ph/0611837 · doi:10.1111/j.1745-3933.2006.00269.x
Abstract
We report the detection of HI absorption towards the inner double of the double-double radio galaxy (DDRG) J1247+6723 with the Giant Metrewave Radio Telescope (GMRT). The inner double is a Giga-hertz peaked spectrum (GPS) source with a linear size of 14 pc while the overall size defined by the outer double is 1195 kpc, making it a giant radio source. The absorption profile is well resolved and consists of a number of components on either side of the optical systemic velocity. The neutral hydrogen column density is estimated to be N(HI)=6.73*10^{20}(T_s/100)(f_c/1.0) cm^{-2}, where T_s and f_c are the spin temperature and covering factor of the background source respectively. We explore any correlation between the occurrence of HI absorption and rejuvenation of radio activity and suggest that there could be a strong relationship between them.
5 pages, 2 figures, accepted for publication in MNRAS Letters
References in corpus (4)
Cited by in corpus (10)
- On the Evolution of and High-Energy Emission from GHz-Peaked-Spectrum Sources
- Spitzer mid-infrared spectroscopy of compact symmetric objects: What powers radio-loud active galactic nuclei?
- A Giant Metrewave Radio Telescope search for associated H{\sc i} 21\,cm absorption in GHz-peaked-spectrum sources
- The peculiar radio galaxy 4C 35.06: a case for recurrent AGN activity?
- Correlation between X-ray and radio absorption in compact radio galaxies
- Decoding the giant extragalactic radio sources
- A search for molecular gas in restarting radio galaxies
- Search and analysis of giant radio galaxies with associated nuclei (SAGAN) V. Study of giant double-double radio galaxies from LoTSS DR2
- Simulations and Observations of the Microwave Universe
- HI gas in the rejuvenated radio galaxy PKS 2014-55