Results 1 to 10 of about 319 (139)

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   +4 more sources

Weak-lensing Analysis of the Complex Cluster Merger A746 with Subaru/Hyper Suprime-Cam

The Astrophysical Journal
The galaxy cluster A746 ( z = 0.214), featuring a double radio relic system, two isolated radio relics, a possible radio halo, disturbed V-shaped X-ray emission, and intricate galaxy distributions, is a unique and complex merging system.
K. HyeongHan, H. Cho, M. James Jee, D. Wittman, S. Cha, W. Lee, K. Finner, K. Rajpurohit, M. Brüggen, W. Forman, C. Jones, R. van Weeren, A. Botteon, L. Lovisari, A. Stroe, P. Domínguez-Fernández, E. O’Sullivan, J. Vrtilek   +17 more
doaj   +1 more source

Serendipitous Discovery of a Young Cluster of Galaxies at z ∼ 0.5 Projected Next to the Nearby Tadpole Galaxy KUG 1138 + 327

The Astrophysical Journal
Using a 90 ks Chandra ACIS-S observation in the 0.3–7 keV band, along with complementary Low-Frequency Array and Karl G. Jansky Very Large Array data in the 120–168 MHz and 1–2 GHz ranges, we study the diffuse emission around the nearby dwarf galaxy KUG ...
Q. Daniel Wang, Juergen Ott
doaj   +1 more source

Simulating Radio Synchrotron Morphology, Spectra, and Polarization of Cosmic Ray Driven Galactic Winds

The Astrophysical Journal
The formation of galaxies is significantly influenced by galactic winds, possibly driven by cosmic rays due to their long cooling times and better coupling to plasma compared to radiation.
H.-H. Sandy Chiu, Mateusz Ruszkowski, Timon Thomas, Maria Werhahn, Christoph Pfrommer   +4 more
doaj   +1 more source

Multiple Emission Regions in Jets of the Low-Luminosity Active Galactic Nucleus in NGC 4278

The Astrophysical Journal
The Large High Altitude Air Shower Observatory (LHAASO) has detected very-high-energy gamma rays from the low-ionization nuclear emission-line region galaxy NGC 4278, which has a low-luminosity active galactic nucleus (LLAGN) and symmetric, mildly ...
Samik Dutta, Nayantara Gupta
doaj   +1 more source

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   +1 more source

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   +1 more source

Astronomaly Protege: Discovery through Human-machine Collaboration

The Astronomical Journal
Modern telescopes generate catalogs of millions of objects with the potential for new scientific discoveries, but this is beyond what can be examined visually.
Michelle Lochner, Lawrence Rudnick
doaj   +1 more source

The X-shaped Radio Galaxy J0725+5835 is Associated with an AGN Pair [PDF]

, 2022
Xiaolong Yang, Jialu Ji, Ravi Joshi, Jun Yang, Tao An, Ran Wang, Luis C. Ho, D. H. Roberts, L. Saripalli   +8 more
openalex   +1 more source

Spectral index variation across X-shaped radio galaxies [PDF]

, 2023
Dusmanta Patra, Ravi Joshi, Gopal‐Krishna   +2 more
openalex   +1 more source