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Powerful radio galaxies are often associated with gas-rich galaxy mergers. These mergers may provide the fuel to trigger starburst and active galactic nuclear (AGN) activity. In this Research Note, we study the host galaxies of three…

We present a radio morphological study and spectral analysis for a sample of 13 cD galaxies in rich and poor clusters of galaxies.} Our study is based on new high sensitivity Giant Metrewave Radio Telescope (GMRT) observations at 1.28 GHz,…

We present the results of new rest-frame far-IR observations of the z = 4.25 radio galaxy, 8C1435+635, which not only confirm that it contains an enormous quantity of dust (as first inferred from its mm-wave detection by Ivison 1995) but…

NGC 253 hosts the nearest nuclear starburst. Previous observations show a region rich in molecular gas, with dense clouds associated with recent star formation. We used ALMA to image the 350 GHz dust continuum and molecular line emission…

The cessation of AGN activity in radio galaxies leads to a remnant phase during which jets are no longer sustained, but lobes can be detected for a period of time before they fade away due to radiative and dynamical energy losses. The…

Astrophysics of Galaxies · Physics 2022-12-19 Sushant Dutta , Veeresh Singh , C. H. Ishwara Chandra , Yogesh Wadadekar , Abhijit Kayal

We present a multiwavelength investigation of star formation activity towards the southern H II regions associated with IRAS 17160-3707, located at a distance of 6.2 kpc with a bolometric luminosity of 830000 Lsun.The ionised gas…

Astrophysics of Galaxies · Physics 2016-11-15 G. Nandakumar , V. S. Veena , S. Vig , A. Tej , S. K. Ghosh , D. K. Ojha

We report results from XMM-Newton and Chandra observations of the nearby (z = 0.067) giant radio galaxy 3C 35. We find evidence for an X-ray emitting gas belt, orthogonal to and lying between the lobes of 3C 35, which we interpret as…

Cosmology and Nongalactic Astrophysics · Physics 2013-02-28 Elizabeth J. A. Mannering , Diana M. Worrall , Mark Birkinshaw

We present low-frequency observations starting from ~150 MHz with the Giant Metrewave Radio Telescope (GMRT), and high-frequency observations with the Very Large Array (VLA) of two large radio galaxies 3C46 and 3C452. These observations…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 S. Nandi , A. Pirya , S. Pal , C. Konar , D. J. Saikia , M. Singh

To investigate the impact of radio jets during the formation epoch of their massive host galaxies, we present an analysis of two massive, log(M_stel/ M_sun)~10.6 and 11.3, compact radio galaxies at z=3.5, TNJ0205+2242 and TNJ0121+1320.…

Astrophysics · Physics 2009-11-13 N. P. H. Nesvadba , M. D. Lehnert , C. De Breuck , A. Gilbert , W. van Breugel

We present deep near-infrared images, taken with Subaru Telescope, of the region around the z=1.08 radio source 3C 356 which show it to be associated with a poor cluster of galaxies. We discuss evidence that this cluster comprises two…

Astrophysics · Physics 2009-11-07 Chris Simpson , Steve Rawlings

We report new detailed surface U, B, V, R, and I photometry of 81 stellar structures in the disk of the barred galaxy NGC 3367. The images show many different structures indicating that star formation is going on in the most part of the…

We present deep kpc- and pc-scale neutral atomic hydrogen (HI) absorption observations of a very young radio source (< 5000 yrs), 4C 31.04, using the WSRT and the Global VLBI array. Using $z=0.0598$, we detect a broad absorption feature…

Astrophysics of Galaxies · Physics 2024-08-07 Suma Murthy , Raffaella Morganti , Tom Oosterloo , Robert Schulz , Zsolt Paragi

We report the discovery of the largest giant radio galaxy, J1420-0545: a FR type II radio source with an angular size of 17.4' identified with an optical galaxy at z=0.3067. Thus, the projected linear size of the radio structure is 4.69 Mpc…

Astrophysics · Physics 2010-11-11 J. Machalski , D. Kozieł-Wierzbowska , M. Jamrozy , D. J. Saikia

We report the radio continuum structure of the barred galaxy NGC 3367 with an angular resolution of 4''.5. The radio structure indicates emission from the disk and from a triple source consisting of the nucleus straddled by extended sources…

Astrophysics · Physics 2009-10-30 J. A. Garcia-Barreto , L. Rudnick , J. Franco , M. Martos

9C J1503+4528 is a very young CSS radio galaxy, with an age of order 10^4 years. This source is therefore an ideal laboratory for the study ofthe intrinsic host galaxy/IGM properties, interactions between the radio source and surrounding…

We associate the existence of short-lived compact radio sources with the intermittent activity of the central engine caused by a radiation pressure instability within an accretion disk. Such objects may constitute a numerous sub-class of…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-11 Bozena Czerny , Aneta Siemiginowska , Agnieszka Janiuk , Blazej Nikiel-Wroczynski , Lukasz Stawarz

With multiband photometric data in public archives, we detected four intracluster star-forming regions in the Virgo cluster. Two of them were at a projected distance of 35 kpc away from NGC4388, and the other two were 66 kpc away. Our new…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Masafumi Yagi , Liyi Gu , Yutaka Fujita , Kazuhiro Nakazawa , Takuya Akahori , Takashi Hattori , Michitoshi Yoshida , Kazuo Makishima

Radio galaxies with jets of relativistic particles are usually hosted by massive elliptical galaxies with active nuclei powered by accretion of interstellar matter onto a supermassive black hole. In some rare cases (<5%), their jets drive…

Astrophysics of Galaxies · Physics 2020-11-11 Pratik Dabhade , Francoise Combes , Philippe Salome , Joydeep Bagchi , Mousumi Mahato

Much of the evolution of galaxies takes place in groups where feedback has the greatest impact on galaxy formation. By using an optically selected, statistically complete sample of 53 nearby groups (CLoGS), observed in Radio (GMRT) and in…

NIR K band imaging spectroscopy of the central 8'' (1.3 kpc) in the Wolf-Rayet LINER galaxy NGC6764 shows that the most recent star formation is most likely still unresolved at sub-arcsecond resolution (< 100pc). The continuum source has a…

Astrophysics · Physics 2009-10-31 E. Schinnerer , A. Eckart , Th. Boller