Results 21 to 30 of about 7,156,946 (172)

A Unified Framework for X-shaped Radio Galaxies

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 North, Matthew Hopkins   +5 more
openaire   +2 more sources

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

Monthly Notices of the Royal Astronomical Society, 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).
Lal, Dharam Vir, Hardcastle, Martin J., Kraft, Ralph P.   +2 more
openaire   +3 more sources

Relationship between X-shaped radio sources and double-double radio galaxies [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractBoth 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. These models suggest some relationship between the two types of radio sources. In this paper, we collected data from literatures for two samples of X-shaped
Xian Chen, Fukun Liu
openaire   +1 more source

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 smaller galaxy spirals towards the common center, it releases gas to the ISM of the larger active ...
openaire   +2 more sources

Arp 299-A: More than "just" a prolific supernova factory [PDF]

, 2010
We present partial results from our monitoring of the nuclear region of the starburst galaxy IC 694 (=Arp 299-A) at radio wavelengths, aimed at discovering recently exploded core-collapse supernovae, as well as to determine their rate of explosion, which
Marco Bondi, Alberdi, Antonio, Romero-Cañizales, Cristina, Bondi, Marco, Antxon Alberdi, Cristina Romero-Canizales, Polatidis, Antonis, Pérez-Torres, Miguel A, Antonis Polatidis, Miguel Perez-Torres   +9 more
core   +1 more source

X-shaped Radio Galaxies: Optical Properties, Large-scale Environment, and Relationship to Radio Structure [PDF]

The Astrophysical Journal, 2019
Abstract 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, Gopal Krishna, Xiaolong Yang, Jingjing Shi, Si-Yue Yu, Paul J. Wiita, Luis C. Ho, Xue-Bing Wu, Tao An, Ran Wang, Smitha Subramanian, Hassen Yesuf   +11 more
openaire   +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 re-examine the origin of these extensions relating the radio morphology to the properties of their ...
Capetti, A., Zamfir, S., Rossi, P., Bodo, G., Zanni, C., Massaglia, S.   +5 more
openaire   +2 more sources

Spectral index variation across X-shaped radio galaxies

, 2023
20 pages, 2 figures, 2 tables, accepted for publication in ...
Patra, Dusmanta, Joshi, Ravi, Gopal-Krishna   +2 more
openaire   +2 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
Astronomy & Astrophysics, in ...
Machalski, Jerzy, Jamrozy, Marek, Stawarz, Łukasz, Weżgowiec, Marek   +3 more
openaire   +3 more sources

Is the giant radio galaxy M 87 a TeV gamma-ray emitter? [PDF]

, 2003
For the first time an excess of photons above an energy threshold of 730 GeV from the giant radio galaxy M 87 has been measured at a significance level above 4 σ.
Mirzoyan, R., Ripken, J., Kohnle, A., Kankanyan, R., R. de los Reyes, Denninghoff, S., Beilicke, M., Rauterberg, G., T. Coarasa, D. Horns, A. Kohnle, O. Bolz, Reyes, R., Ona, E., G. Hermann, A. Plyasheshnikov, Jung, I., D. Kranich, Tluczykont, M., Konopelko, A., Pühlhofer, G., Cortina, J., V. Sahakian, Bernlohr, K., M. Girma, Krawczynski, H., Bojahr, H., F. Aharonian, Samorski, M., H. J. Völk, G. Pühlhofer, Hermann, G., D. Sobzynska, H.-G. Börst, M. Siems, Stamm, W., Lopez, M., W. Rhode, Sahakian, V., Lorenz, E., Mang, O., Moralejo, A., M. Kestel, Contina, J., Rohring, A., A. Moralejo, W. Wittek, M. Lopez, Akhperjanian, A., O. Mang, Gotting, N., G. Rowell, K. Bernlöhr, M. Schilling, Plyasheshnikov, A., Rowell, G., M. V. Fonseca, Kranich, D., E. Lorenz, Kestel, M., M. Tluczykont, Girma, M., A. Heusler, V. Vitale, Meyer, H., R. Mirzoyan, H. Bojahr, A. Konopelko, H. Kornmeyer, J. Cortina, Horns, D., H. Lampeitl, I. Jung, Bolz, O., Völk, H., Borst, H., E. Ona-Wilhelmi, Aharonian, F., Coarasa, T., Heusler, A., W. Stamm, J. L. Contreras, Contreras, J., Lampeitl, H., M. Samorski, Kornmeyer, H., et al., N. Götting, Siems, M., Fonseca, V., C. A. Wiedner, G. Heinzelmann, Rhode, W., M. Beilicke, Wiedner, C., Sobzynska, D., S. Denninghoff, H. Meyer, Panter, M., R. Kankanyan, J. Ripken, M. Panter, A. Akhperjanian, Fonseca, M., W. Hofmann, F. Lucarelli, Wittek, W., Schilling, M., Hofmann, W., Heinzelmann, G., Lucarelli, F.   +110 more
core   +1 more source