Results 131 to 140 of about 25,311 (211)

Radio properties of the quasi-periodic eruption source RXJ1301.9+2747 at parsec scales

Astronomy & Astrophysics
Quasi-periodic eruptions (QPEs) are repeating soft X-ray flares associated with galactic nuclei. Several recent works have found evidence that the accretion flow in the galactic nuclei of QPEs is of recent origin, and that it is unlike canonical active ...
von Fellenberg S. D., Arcodia R., Benke P., Goodwin A., Kovalev Y. Y., Ros E., Janssen M., Giustini M., Miniutti G.   +8 more
doaj   +1 more source

Recognizing Blazars Using Radio Morphology from the VLA Sky Survey

The Astrophysical Journal
Blazars are radio-loud active galactic nuclei whose jets have a very small angle to our line of sight. Observationally, the radio emissions are mostly compact or compact-core with a one-sided jet.
Zhang-Liang Xie, Eduardo Bañados, Silvia Belladitta, Chiara Mazzucchelli, Jan-Torge Schindler, Frederick Davies, Bram P. Venemans   +6 more
doaj   +1 more source

Here Be SDRAGNs—Spiral Galaxies Hosting Large Double Radio Sources

The Astronomical Journal
We present a sample of large double radio sources hosted by spiral galaxies (spiral double radio active galactic nuclei, SDRAGNs). Candidates were initially selected through the Radio Galaxy Zoo project and subsequently refined using Sloan Digital Sky ...
Jean Tate, William C. Keel, Michael O’Keeffe, O. Ivy Wong, Heinz Andernach, Julie K. Banfield, Alexei Moiseev, Aleksandrina Smirnova, Arina Arshinova, Eugene Malygin, Elena Shablovinskaya, Roman Uklein, Stanislav Shabala, Ray Norris, Brooke D. Simmons, Rebecca Smethurst, Ivan Terentev, Chris Molloy, Victor Linares   +18 more
doaj   +1 more source

Jets from a stellar-mass black hole are as relativistic as those from supermassive black holes

Nature Communications
Relativistic jets from supermassive black holes in active galactic nuclei are amongst the most powerful phenomena in the universe. Similar jets from stellar-mass black holes offer a chance to study the phenomena on accessible observation time scales ...
X. Zhang, W. Yu, F. Carotenuto, R. Fender, S. Motta, A. Bahramian, J. C. A. Miller-Jones, T. D. Russell, S. Corbel, P. A. Woudt, P. Atri, C. Knigge, G. R. Sivakoff, A. K. Hughes, J. van den Eijnden, J. H. Matthews, M. C. Baglio, P. Saikia   +17 more
doaj   +1 more source

VaDAR: Varstrometry for Dual AGN Using Radio Interferometry

The Astrophysical Journal
Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes.
Emma Schwartzman, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg   +7 more
doaj   +1 more source

JWST Resolves Jet-driven H2 and Ionized Outflows in Radio Galaxy 3C 305

The Astrophysical Journal
We present JWST MIRI medium-resolution spectrometer (MRS), NIRSpec, NIRCam, and MIRI imaging observations of 3C 305, a radio galaxy with a compact jet that is confined within the galaxy. We utilize the H _2 0–0 S(1)–S(7) lines, several mid-infrared (MIR)
Biny Sebastian, Patrick M. Ogle, P. Guillard, L. Lanz, R. Morganti, V. Reynaldi, I. E. López, B. Emonts, S. Garcia-Burillo, C. Tadhunter, C. P. O’Dea, S. Baum, F. R. Faifer, A. Labiano, M. Lehnert, A. Togi, K. Alatalo, P. Appleton, R. Bhutkar, E. Egami   +19 more
doaj   +1 more source

A Wide and Deep Exploration of Radio-detected Active Galactic Nuclei with Subaru HSC (WERGS). XII. Final Optical Identification of VLASS Radio Sources from the Subaru/HSC-SSP Wide Survey over 1200 deg2

The Astrophysical Journal Supplement Series
We present a wide-area and deep optical identification catalog for radio sources based on the Very Large Array Sky Survey (VLASS) Epoch 2 catalog at 3 GHz.
Hisakazu Uchiyama, Kohei Ichikawa, Youwen Kong, Yuxing Zhong, Xiaoyang Chen, Tohru Nagao, Kianhong Lee, Kotaro Kohno, Bovornpratch Vijarnwannaluk, Masayuki Akiyama, Yen-Ting Lin, Yoshiki Toba, Sakiko Obuchi, Itsna Khoirul Fitriana   +13 more
doaj   +1 more source

Deciphering Radio Emissions from Accretion Disk Winds in Radio-quiet Active Galactic Nuclei

The Astrophysical Journal
Unraveling the origins of radio emissions from radio-quiet active galactic nuclei (RQ AGNs) remains a pivotal challenge in astrophysics. One potential source of this radiation is the shock interaction between AGN disk winds and the interstellar medium ...
Tomoya Yamada, Nobuyuki Sakai, Yoshiyuki Inoue, Tomonari Michiyama   +3 more
doaj   +1 more source

Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)?

The Astrophysical Journal
Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still unclear whether
Shuang-Liang Li, Wenwen Zuo, Xinwu Cao
doaj   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source