Results 1 to 10 of about 26,826 (133)

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 ...
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
core   +3 more sources

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

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   +3 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   +2 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   +2 more sources

Orientation and size of the `Z' in `X'-shaped radio galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
Some X-shaped radio galaxies show a Z-symmetric morphology in the less luminous secondary lobes. Within the scenario of a merger between two galaxies, each hosting a supermassive black hole in its center, this structure has been explained before: As the ...
Begelman, Bekki, Biermann, Blandford, Bournaud, Braun, Brown, C. Zier, Caldwell, Charmandaris, Chirvasa, Clarke, Cowie, Danziger, Dennett-Thorpe, Dufour, Dupraz, Dupraz, Ekers, Enβlin, Fanaroff, Gopal-Krishna, Goudfrooij, Gower, Gull, Hernquist, Hibbard, Hibbard, Leahy, Leahy, Malin, Merritt, Mihos, Morganti, Morganti, Murgia, O'Donoghue, Oosterloo, Quinn, Rottmann, Sage, Schiminovich, Swaters, Thilker, Van Gorkom, Van Gorkom, Wang, Wilson, Zier, Zier   +49 more
core   +3 more sources

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

The Astrophysical Journal, 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-
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
core   +2 more sources

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

Astronomy & Astrophysics, 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
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
core   +5 more sources

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

Monthly Notices of the Royal Astronomical Society, 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 ...
F. K. Liu, Sudou
core   +2 more sources

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

Proceedings of From Planets to Dark Energy: the Modern Radio Universe — PoS(MRU), 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.
Saripalli, Lakshmi, Subrahmanyan, Ravi, Laskar, Tanmoy, Koekemoer, Anton   +3 more
openaire   +3 more sources

Hydrodynamical backflow in X-shaped radio galaxy PKS 2014−55 [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT We present MeerKAT 1.28 GHz total-intensity, polarization, and spectral-index images covering the giant (projected length l ≈ 1.57 Mpc) X-shaped radio source PKS 2014−55 with an unprecedented combination of brightness sensitivity and angular resolution.
F Camilo, V Krishnan, T Mauch, O M Smirnov, R S Kupa, B Fanaroff, L Bester, M Atemkeng, N Oozeer, R Deane, S V White, G I G Józsa, B S Frank, J J Condon, K Thorat, W D Cotton   +15 more
openaire   +3 more sources