Results 1 to 10 of about 231 (80)

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   +1 more source

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

CHANG-ES. XXXVIII. A Thin Radio Halo Shaped by Slow Cosmic-Ray Transport in the Quiescent Galaxy NGC 4565

The Astrophysical Journal
We present the Very Large Array C-array S -band (2–4 GHz) radio continuum observations of the nearby edge-on spiral galaxy NGC 4565, a target from the Continuum Halos in Nearby Galaxies—an EVLA Survey.
Jianghui Xu, Jiang-Tao Li, Guilin Liu, Luan Luan, Volker Heesen, Rainer Beck, Judith Irwin, Q. Daniel Wang, Michael Stein, Li-Yuan Lu, Yang Yang, Jeroen Stil, Jayanne English, Ralf-Jürgen Dettmar   +13 more
doaj   +1 more source

A Deep Chandra View of A2597: Bubbles, Shocks, Cold Fueling, and a Plasma Depletion Layer

The Astrophysical Journal
To examine how active galactic nucleus (AGN) feedback shapes the intracluster medium (ICM) and fuels black hole accretion in the cool-core galaxy cluster A2597, we present deep (∼600 ks) Chandra X-ray observations complemented by archival GMRT radio and ...
Osase Omoruyi, Grant Tremblay, Stefi A. Baum, Tracy E. Clarke, Pratik Dabhade, Andrew Fabian, Massimo Gaspari, Sanna Gulati, Preeti Kharb, Maxim Markevitch, Paul Nulsen, Christopher P. O’Dea, Scott Randall, Somak Raychaudhury, Sravani Vaddi, Alexey Vikhlinin, John Zuhone   +16 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