Results 21 to 30 of about 35,434 (190)

X-Shaped Radio Galaxies and the Nanohertz Gravitational Wave Background [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractCoalescence of supermassive black holes (SMBHs) in galaxy mergers is potentially the dominant contributor to the low frequency gravitational wave background (GWB). It was proposed by Merritt & Ekers that X-shaped radio galaxies are signposts of such coalescences and that their abundance might be used to predict the magnitude of the GWB ...
D. H. Roberts, L. Saripalli, R. Subrahmanyan   +2 more
semanticscholar   +4 more sources

Discovery of an unusual radio galaxy with a hybrid double-double and X-shaped morphology [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractWe report the discovery of the first ‘X’-shaped double-double radio galaxy (DDRG), MRC0929+164 (J0932+1611), from FIRST radio survey. The intersection angle of the lines of two pairs of radio lobes is around 20.6° for this object, much larger than other DDRGs.
C. C. Wang, Hongyan Zhou, Tuo Ji, Wenjuan Liu, Ning Jiang   +4 more
semanticscholar   +4 more sources

FIRST "Winged" and X-shaped Radio Source Candidates: II. New Redshifts [PDF]

, 2008
We report optical spectroscopic observations of X-shaped radio sources with the Hobby-Eberly Telescope and Multiple-Mirror Telescope, focused on the sample of candidates from the FIRST survey presented in Paper I (Cheung 2007).
Adelman-McCarthy, Andrés Jordán, Bonning, C. C. Cheung, Cheung, Condon, de Koff, de Vaucouleurs, Fanaroff, Gijs Verdoes Kleijn, Hermine Landt, Komossa, Komossa, Leahy, Leahy, Lehár, Machalski, Miller, Monet, Owen, Rottmann, Saripalli, Schlegel, Stephen E. Healey, Tadhunter, Ulrich, Urry, Zirbel   +27 more
core   +2 more sources

The Abundance of X-Shaped Radio Sources: Implications for the Gravitational Wave Background [PDF]

, 2015
Coalescence of super massive black holes (SMBH's) in galaxy mergers is potentially the dominant contributor to the low frequency gravitational wave background (GWB).
Roberts, David H., Saripalli, Lakshmi, Subrahmanyan, Ravi   +2 more
core   +4 more sources

CGCG 292-057 - a radio galaxy with merger-modulated radio activity [PDF]

, 2012
We announce the discovery of a unique combination of features in a radio source identified with the merger galaxy CGCG 292-057. The radio galaxy both exhibits a highly complex, X-like structure and shows signs of recurrent activity in the form of double ...
A. Kuźmicz, Andreasyan, Baars, Baldwin, Becker, Bessell, Brocksopp, Bruzual, Buttiglione, Capetti, Cattaneo, Cattaneo, Cheung, Cid, Cohen, Condon, D. Kozieł-Wierzbowska, Dennett-Thorpe, Evans, Fanaroff, G. Stachowski, Gopal-Krishna, Gopal-Krishna, Gregory, Guthrie, Hardcastle, Hardcastle, Healey, Heckman, Heckman, Heckman, Hodges-Kluck, Hodges-Kluck, Hota, Keel, Kewley, Laing, Lal, Lal, Leahy, Leahy, Liu, Liu, Liu, M. Jamrozy, Martel, Mateus, Merritt, Mihos, Murgia, Palimaka, Parma, Parma, Rengelink, S. Zola, Saikia, Saripalli, Schoenmakers, Shimasaku, Spergel, Springel, Stoughton, Strateva, Sánchez, Tremaine, Wilson, Worrall, York   +67 more
core   +2 more sources

The innermost region of the water megamaser radio galaxy 3C403 [PDF]

, 2007
The standard unified scheme of active galactic nuclei requires the presence of high column densities of gas and dust potentially obscuring the central engine.
Braatz, J., Brunthaler, A., Henkel, C., Menten, K. M., Tarchi, A., Weiss, A.   +5 more
core   +2 more sources

From 100 MHz to 10 GHz: Unveiling the spectral evolution of the X-shaped radio galaxy in Abell 3670 [PDF]

Astronomy & Astrophysics
X-shaped radio galaxies (XRGs) are characterised by two pairs of misaligned lobes: active lobes hosting radio jets and the wings. None of the formation mechanisms proposed thus far are able to exhaustively reproduce the diverse features observed among ...
L. Bruno, M. Brienza, A. Zanichelli, M. Gitti, F. Ubertosi, K. Rajpurohit, T. Venturi, D. Dallacasa   +7 more
semanticscholar   +4 more sources

Discovery of Giant Bubbles in the Hot Gaseous Halo of the Massive Disk Galaxy NGC 6286

The Astrophysical Journal
Based on archival Chandra X-ray observation, optical integral-field spectroscopic data, and radio interferometric data, we report the discovery of a pair of giant bubbles (with a projected radius ∼5 kpc) of ionized gas emerging from a highly inclined ...
Lin He, Zhiyuan Li, Zongnan Li, Rubén García-Benito, Yuanqi Liu, Meicun Hou   +5 more
doaj   +2 more sources

Jet Interaction with Galaxy Cluster Mergers

The Astrophysical Journal
Active galactic nucleus (AGN) bubbles in cool-core galaxy clusters are believed to facilitate the transport of cosmic-ray electrons (CRe) throughout the cluster.
P. Domínguez-Fernández, J. ZuHone, R. Weinberger, E. Bellomi, L. Hernquist, P. Nulsen, G. Brunetti   +6 more
doaj   +2 more sources

A Unified Framework for X-shaped Radio Galaxies [PDF]

The Astrophysical Journal, 2020
Abstract We propose a radically different picture for X-shaped radio galaxies compared with existing models as transition objects between cold-mode accreting, low-spinning retrograde black holes and low-spinning prograde black holes. This model explains their smaller average black hole masses; their general aversion for cluster compared ...
David Garofalo, Ravi Joshi, Xiaolong Yang, Chandra B. Singh, Max M. North, Matthew J. Hopkins   +5 more
openalex   +4 more sources