Results 1 to 10 of about 7,516,516 (168)

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

Origin of the Double-peaked Narrow Emission Lines in the Optical Spectra of X-shaped Radio Galaxies

The Astrophysical Journal
We investigate X-shaped radio galaxies (XRGs) with optical double-peaked narrow emission lines (DPNELs) as potential hosts of dual or binary supermassive black holes (SMBHs).
Ghosh Prajnadipt, Ravi Joshi, Xiaolong Yang, Yingkang Zhang, Gopal-Krishna, Paul J. Wiita, Dusmanta Patra, Ankit Patel, Arti Goyal, Gourab Giri, Santanu Mondal, Vibhore Negi, Marek Weżgowiec, Katarzyna Małek, Xue-Bing Wu, Luis C. Ho   +15 more
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Detection of a parsec-scale, compact, and fading ejecta from an accreting massive black hole

Astronomy & Astrophysics
Dwarf galaxies, characterized by their low luminosities and masses, are excellent candidates for searches for intermediate-mass black holes (IMBHs), particularly when they show strong accretion and ejection activity.
Li Chao, Chang Ning, Yang Jun, Cui Lang, Ho Luis C.   +4 more
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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
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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
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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
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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

JWST Reveals How Black Holes are Fed: Kiloparsec-scale Multiphase Filaments Feed Subkiloparsec Circumnuclear Disks

The Astrophysical Journal Letters
The Centaurus cluster is one of the most important archetypes of radio-mode active galactic nucleus (AGN) feedback, with its central galaxy, NGC 4696, launching powerful jets that inflate X-ray cavities and regulate cooling and star formation.
Julie Hlavacek-Larrondo, Hyunseop Choi, Minghao Guo, Mathieu Marquis, Olivia Pereira, G. Mark Voit, Loïc Albert, Jorge Barrera-Ballesteros, Rebecca E. A. Canning, Francesco D’Eugenio, Megan Donahue, Andrew C. Fabian, Gary J. Ferland, John S. Gallagher, Marie-Lou Gendron-Marsolais, Pierre Guillard, Nina Hatch, Ralf Kotulla, Yuan Li, Roberto Maiolino, Allison Man, Michael A. McDonald, B. R. McNamara, Valeria Olivares, Marine Prunier, Michael Reefe, Christopher S. Reynolds, Carter Rhea, Annabelle Richard-Laferrière, Helen R. Russell, Philippe Salomé, Ming Sun, Prathamesh Tamhane, Gregory Taylor, Auriane Thilloy, Grant R. Tremblay, Benjamin Vigneron, Stephen A. Walker   +37 more
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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