Results 21 to 30 of about 194,281 (190)
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.
Mar Mezcua +3 more
arxiv +7 more sources
Relationship between X-shaped radio sources and double-double radio galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 Both the X-shaped radio galaxies and double-double radio galaxies (DDRGs) are suggested in the literature to be due to the binary-accretion disk interaction or to the coalescence of SMBBHs.
Xian Chen, F. K. Liu
semanticscholar +4 more sources
Host Galaxies of X-Shaped Radio Sources [PDF]
, 2006 The majority of radiation from galaxies containing active galactic nuclei (AGNs) is emitted not by the stars composing the galaxy, but from an active source at the galactic center, most likely a supermassive black hole.
Alessondra Springmann
semanticscholar +5 more sources
The Chandra View of Nearby X-shaped Radio Galaxies [PDF]
Astrophys.J.710:1205-1227,2010, 2009 We present new and archival Chandra X-ray Observatory observations of X-shaped radio galaxies within z < 0.1 alongside a comparison sample of normal double-lobed FR I and II radio galaxies. By fitting elliptical distributions to the observed diffuse hot X-ray emitting atmospheres, we find that the ellipticity and the position angle of the hot gas ...
Edmund Hodges‐Kluck +3 more
arxiv +8 more sources
X-shaped Radio Galaxies: Optical Properties, Large-scale Environment, and Relationship to Radio Structure [PDF]
The Astrophysical Journal, 2019 In pursuit of clues to the origin of “winged” or X-shaped radio galaxies (XRGs) we investigate the parent galaxies of a large sample of 106 XRGs for optical–radio axes alignment, interstellar medium, black hole mass, and large-scale environment.
Ravi Joshi +11 more
semanticscholar +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 that result under certain conditions.
Edmund Hodges‐Kluck, C. S. Reynolds
semanticscholar +7 more sources
X-Shaped Radio Galaxies and the Nanohertz Gravitational Wave Background [PDF]
Proceedings of the International Astronomical Union, 2015 Coalescence of supermassive black holes (SMBHs) in galaxy mergers is potentially the dominant contributor to the low frequency gravitational wave background (GWB).
D. H. Roberts +2 more
semanticscholar +4 more sources
Dynamical analysis of the complex radio structure in 3C 293: clues on a rapid jet realignment in X-shaped radio galaxies [PDF]
Astronomy & Astrophysics, 2016 Context. Radio galaxies classified as X-shaped/winged, are characterised by two pairs of extended and misaligned lobes, which suggest a rapid realignment of the jet axis, for which a potential cause (including binary supermassive black holes, a black ...
J. Machalski +3 more
semanticscholar +8 more sources
GMRT Low-frequency Imaging of an Extended Sample of X-shaped Radio Galaxies [PDF]
The Astronomical Journal, 2019 We present a low-frequency imaging study of an extended sample of X-shaped radio sources using the Giant Metrewave radio telescope (GMRT) at two frequencies (610 and 240 MHz). The sources were drawn from a Very Large Array FIRST-selected sample and extends an initial GMRT study at the same frequencies, of 12 X-shaped radio galaxies predominantly from ...
D. Lal +3 more
arxiv +8 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 We 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 ...
C. C. Wang +4 more
semanticscholar +4 more sources