Results 81 to 90 of about 2,139,047 (199)

Varstrometry for Dual Active Galactic Nuclei Using Radio Interferometry: VaDAR with the VLBA

The Astrophysical Journal
Multiple active galactic nuclei (multi-AGN) are a known result of galaxy mergers. Therefore, they are an important tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. A novel method for the selection of multi-
Emma Schwartzman, Paula Fudolig, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg   +8 more
doaj   +1 more source

Active Galactic Nuclei and Host Galaxies in COSMOS-Web. II. First Look At the Kiloparsec-scale Dual and Offset AGN Population

The Astrophysical Journal
Kiloparsec-scale dual and offset active galactic nuclei (AGNs) are signposts of accreting supermassive black holes (SMBHs) triggered during late-stage galaxy mergers, offering crucial insights into the coevolution of SMBHs and galaxies. However, robustly
Junyao Li, Ming-Yang Zhuang, Yue Shen, Marta Volonteri, Nianyi Chen, Tiziana Di Matteo   +5 more
doaj   +1 more source

The Gamma-Ray Luminosity Function of Flat-spectrum Radio Quasars

The Astrophysical Journal
We have utilized the largest sample of gamma-ray-selected Fermi flat-spectrum radio quasars (FSRQs) ever used (519 sources) to construct the luminosity function and its evolution through cosmic history. In addition to spanning large redshift (0 
Garima Rajguru, L. Marcotulli, M. Ajello, M. Di Mauro, M. Urry   +4 more
doaj   +1 more source

VODKA-JWST: A 3.8 kpc Dual Quasar at Cosmic Noon in a Powerful Starburst Galaxy with JWST/MIRI Integral Field Unit

The Astrophysical Journal
Dual quasars—two active supermassive black holes at galactic scales—represent crucial objects for studying the impact of galaxy mergers and quasar activity on the star formation rate (SFR) within their host galaxies, particularly at cosmic noon when SFR ...
Yu-Ching Chen, Yuzo Ishikawa, Nadia L. Zakamska, Xin Liu, Yue Shen, Hsiang-Chih Hwang, David Rupke, Andrey Vayner, Arran C. Gross, Weizhe Liu, Dominika Wylezalek, Sylvain Veilleux, Caroline Bertemes, Nadiia Diachenko, Swetha Sankar   +14 more
doaj   +1 more source

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source

VODKA-JWST: Synchronized Growth of Two Supermassive Black Holes in a Massive Gas Disk? A 3.8 kpc Separation Dual Quasar at Cosmic Noon with the NIRSpec Integral Field Unit

The Astrophysical Journal
The search for dual supermassive black holes (SMBHs) is of immense interest in modern astrophysics. Galaxy mergers may fuel and produce SMBH pairs. Actively accreting SMBH pairs are observed as dual quasars, which are vital probes of SMBH growth.
Yuzo Ishikawa, Nadia L. Zakamska, Yue Shen, Xin Liu, Yu-Ching Chen, Hsiang-Chih Hwang, Andrey Vayner, David S. N. Rupke, Sylvain Veilleux, Dominika Wylezalek, Arran C. Gross, Swetha Sankar, Nadiia Diachenko   +12 more
doaj   +1 more source

Radio Counterparts of Ultraluminous X-Ray Sources in Nearby Galaxies

The Astrophysical Journal
Radio surveys of ultraluminous X-ray sources (ULXs) allow us to find supercritically accreting compact objects (SS 433/W50-like systems) or stripped nuclear black holes in nearby galaxies. We identified 21 such objects by crossmatching a ULX catalog with
Yijia Zhang, Hua Feng, Ailing Wang, Roberto Soria   +3 more
doaj   +1 more source

A Massive Protocluster Anchored by a Luminous Quasar at z = 6.63

The Astrophysical Journal Letters
Protoclusters, the progenitors of galaxy clusters, trace large scale structures in the early Universe and are important to our understanding of structure formation and galaxy evolution. To date, only a handful of protoclusters have been identified in the
Feige Wang, Jinyi Yang, Joseph F. Hennawi, Xiaohui Fan, Minghao Yue, Eduardo Bañados, Shane Bechtel, Fuyan Bian, Sarah Bosman, Jaclyn B. Champagne, Frederick B. Davies, Roberto Decarli, Emanuele Paolo Farina, Chiara Mazzucchelli, Bram Venemans, Fabian Walter   +15 more
doaj   +1 more source

H-AMR FORGE’d in FIRE. I. Magnetic State Transitions, Jet Launching, and Radiative Emission in Super-Eddington, Highly Magnetized Quasar Disks Formed from Cosmological Initial Conditions

The Astrophysical Journal
Quasars are powered by supermassive black hole (SMBH) accretion disks, yet standard thin disk models are inconsistent with many observations. Recently, P. F. Hopkins et al.
Nicholas Kaaz, Matthew Liska, Alexander Tchekhovskoy, Philip F. Hopkins, Jonatan Jacquemin-Ide   +4 more
doaj   +1 more source

Limits on MACHOs from microlensing in the double quasar Q0957+561

, 1998
10 pages, 4 figures, accepted by Astronomy & ...
Schmidt, Robert, Wambsganss, Joachim
openaire   +2 more sources