Results 1 to 10 of about 188,318 (144)

The Origin of X-shaped Radio Galaxies: Clues from the Z-symmetric Secondary Lobes [PDF]

Astrophys.J.594:L103,2003, 2003
Existing radio images of a few X-shaped radio galaxies reveal Z-symmetric morphologies in their weaker secondary lobes which cannot be naturally explained by either the galactic merger or radio-lobe backflow scenarios, the two dominant models for these X-shaped radio sources.
Charmandaris V., Fanaroff B., Gopal-Krishna, Gopal-Krishna, , Hogbom J. A., Holloway A. J., Laing R. A., Leahy J. P., Paul J. Wiita, Peter L. Biermann   +9 more
arxiv   +9 more sources

On the origin of X-shaped radio-sources: new insights from the properties of their host galaxies [PDF]

Astron.Astrophys. 394 (2002) 39-46, 2002
A significant fraction of extended radio sources presents a peculiar X-shaped radio morphology: in addition to the classical double lobed structure, radio emission is also observed along a second axis of symmetry in the form of diffuse wings or tails. We re-examine the origin of these extensions relating the radio morphology to the properties of their ...
A. Capetti, Blandford, C. Zanni, Capetti, Colella, Dennett-Thorpe, Fanaroff, Fanti, G. Bodo, Harvanek, Klein, Leahy, Murgia, O'Dea, P. Rossi, Rees, S. Massaglia, S. Zamfir, Willis, Wirth, Worrall   +20 more
arxiv   +9 more sources

X-shaped radio galaxies as observational evidence for the interaction of supermassive binary black holes and accretion disk at pc scale [PDF]

Mon.Not.Roy.Astron.Soc. 347 (2004) 1357, 2003
A supermassive black hole binary may form during galaxy mergering. we investigate the interaction of the supermassive binary black holes (SMBBHs) and an accretion disk and show that the detected X-shaped structure in some FRII radio galaxies may be due to the interaction-realignment of inclined binary and accretion disk occurred within the pc scale of ...
F. K. Liu, Sudou
arxiv   +8 more sources

Starbursts and black hole masses in X-shaped radio galaxies: Signatures of a merger event? [PDF]

Astronomy & Astrophysics, 2012
We present new spectroscopic identifications of 12 X-shaped radio galaxies and use the spectral data to derive starburst histories and masses of the nuclear supermassive black holes in these galaxies. The observations were done with the 2.1-m telescope of the Observatorio Astron\'omico Nacional at San Pedro M\'artir, M\'exico.
Chavushyan, V. H., León-Tavares, J., Lobanov, A. P., Mezcua, M.   +3 more
arxiv   +10 more sources

The optical spectra of X-shaped radio galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
X-shaped radio galaxies are defined by their peculiar large-scale radio morphology. In addition to the classical double-lobed structure they have a pair of low-luminosity wings that straddles the nucleus at almost right angles to the active lobes, thus giving the impression of an 'X'.
Aars, Abazajian, Becker, Best, Best, Black, Boroson, Brotherton, Buttiglione, Capetti, Cardelli, Cheung, Cheung, Cheung, Chi C. Cheung, Corbin, De Robertis, Dennett-Thorpe, Dickey, Ekers, Ferland, Gaskell, Gopal-Krishna, Hermine Landt, Hodges-Kluck, Kraft, Lacy, Laing, Lal, Landt, Landt, Landt, Leahy, Leahy, Ledlow, Mannucci, Marziani, Merritt, Miller, Murgia, Osterbrock, Perlman, Peterson, Peterson, Rawlings, Saripalli, Shen, Stephen E. Healey, Tadhunter, Tadhunter, Ulrich, Van Breugel, Wang, Wirth, Worrall, Zhang   +55 more
arxiv   +8 more sources

On the origin of X-shaped radio galaxies [PDF]

Research in Astronomy and Astrophysics, 2011
After a brief, critical review of the leading explanations proposed for the small but important subset of radio galaxies showing an X-shaped morphology (XRGs) we propose a generalized model, based on the jet-shell interaction and spin-flip hypotheses ...
Balcells, Balcells, Barai, Battistini, Biermann, Black, Blandford, Bogdanovič, Cavaliere, Charmandaris, Cheung, Cheung, Choi, de Gouveia Dal Pino, Dupraz, Evans, Evans, Falceta-Gonçalves, Falle, Fanaroff, Ferrarese, Gergely, Giovannini, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Gopal-Krishna, Heinz, Hernquist, Higgins, Hodges-Kluck, Hodges-Kluck, Hodges-Kluck, Hogbom, Holt, Hooda, Hooda, Hota, Israel, Kaiser, Kaiser, Kaiser, Kawakatu, Klein, Komossa, Komossa, Kompaneets, Konar, Kraft, Kunert-Bajraszewska, Kunert-Bajraszewska, Lal, Landt, Lara, Leahy, Leahy, Lippai, Liu, Liu, Liu, Liu, László Á. Gergely, Magorrian, Malin, Malin, Merritt, Miller, Nagar, Nakamura, Natarajan, Noel-Storr, Oosterloo, Palimaka, Paul J. Wiita, Perez-Fournon, Peter L. Biermann, Pierfederici, Press, Prieur, Prieur, Quinn, Ramos Almeida, Rodriguez, Rottmann, Sadler, Sansom, Saripalli, Saripalli, Schiminovich, Schiminovich, Schoenmakers, Shields, Silk, Sillanpaa, Stocke, Sutherland, Tadhunter, Valtonen, Wang, Wang, Wiita, Wilson, Wirth, Worrall, Zeldovich, Zhang, ZieStocr   +112 more
core   +5 more sources

Restarting engine in an X-shaped radio galaxy [PDF]

arXiv, 2008
J2018-556, an X-shaped FR-I radio galaxy provides a unique opportunity to discuss the formation scenarios for the extended structures seen in this class of radio sources. An understanding of the origin of X-shaped source structures has important implications for radio galaxy models as well as black hole-black hole mergers.
L. Saripalli, R. Subrahmanyan, T. Laskar, Anton M. Koekemoer   +3 more
arxiv   +8 more sources

Simulations of Precessing Jets and the Formation of X-shaped Radio Galaxies [PDF]

The Astrophysical Journal, 2023
Jet precession is sometimes invoked to explain asymmetries in radio galaxy (RG) jets and “X/S/Z-shaped” RGs, caused by the presence of a binary black hole companion to the source active galactic nucleus or by accretion instabilities.
Chris Nolting, Jay Ball, Tri M. Nguyen
doaj   +6 more sources

"Normal" FRII Radio Galaxies as a Probe of the Nature of X-Shaped Radio Sources [PDF]

Mon.Not.Roy.Astron.Soc.390:1105, 2008, 2008
We present a multiwavelength radio study of a sample of nearby Fanaroff-Riley class II (FRII) radio galaxies, matched with the sample of known X-shaped radio sources in size, morphological properties and redshift, using new Giant Metrewave Radio Telescope (GMRT) data and archival data from the Very Large Array (VLA).
D. Lal, M. J. Hardcastle, Ralph Kraft
arxiv   +6 more sources

Hydrodynamic Models of Radio Galaxy Morphology: Winged and X-shaped Sources [PDF]

The Astrophysical Journal, 2011
We present three-dimensional hydrodynamic models of radio galaxies interacting with initially relaxed hot atmospheres and explore the significant off-axis radio lobe structures which result under certain conditions.
Hodges-Kluck, Edmund J., Reynolds, Christopher S.   +1 more
core   +4 more sources