Results 161 to 170 of about 53,302 (262)

Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared

The Astrophysical Journal
Effectively finding and identifying active galactic nuclei (AGNs) in dwarf galaxies is an important step in studying black hole formation and evolution.
Megan R. Sturm, Bayli Hayes, Amy E. Reines   +2 more
doaj   +1 more source

An Active Galactic Nucleus Sample with High X‐Ray–to–Optical Flux Ratio from RASS. II. Optical Emission Line Properties of Seyfert 1–Type Active Galactic Nuclei [PDF]

, 2003
Da Xu, S. Komossa, Jian‐Yan Wei, Y. Qian, Xu-Chang Zheng   +4 more
openalex   +1 more source

An NGC 1068-informed Understanding of Neutrino Emission of the Active Galactic Nucleus TXS 0506+056

The Astrophysical Journal
We present arguments that the neutrinos observed by IceCube from the active galactic nucleus TXS 0506+056 may originate near its core and not in the blazar jet.
Arifa Khatee Zathul, Marjon Moulai, Ke Fang, Francis Halzen   +3 more
doaj   +1 more source

Nuclear Activity and Massive Star Formation in the Low‐Luminosity Active Galactic Nucleus NGC 4303:ChandraX‐Ray Observations [PDF]

, 2003
E. Jiménez‐Bailón, M. Santos‐Lleó, J. M. Más-Hesse, M. Guainazzi, L. Colina, M. Cerviño, R. M. González Delgado   +6 more
openalex   +1 more source

The VSOP 5 GHz Active Galactic Nucleus Survey. III. Imaging Results for the First 102 Sources [PDF]

, 2004
William K. Scott, E. B. Fomalont, S. Horiuchi, J. E. J. Lovell, G. Moellenbrock, Richard Dodson, P. G. Edwards, Georgina Coldwell, S. Fodor, S. Frey, Leonid Gurvits, H. Hirabayashi, M. L. Lister, L. Mosoni, Yasuhiro Murata, Z. Paragi, B. G. Piner, Z. Shen, A. R. Taylor, S. J. Tingay   +19 more
openalex   +1 more source

A Luminous X-Ray Active Galactic Nucleus in the Dwarf–Dwarf Galaxy Merger RGG 66

The Astrophysical Journal
We present the discovery of a luminous X-ray active galactic nucleus (AGN) in the dwarf galaxy merger RGG 66. The black hole is predicted to have a mass of M _BH ∼ 10 ^5.4 M _⊙ and to be radiating close to its Eddington limit ( L _bol / L _Edd ∼ 0.75 ...
Seth J. Kimbrell, Amy E. Reines
doaj   +1 more source

Rapid multi-band space-based optical timing: revolutionizing accretion physics

Frontiers in Astronomy and Space Sciences
Optical timing with rapid, seconds-to-minutes cadences with high photometric precision and gap-free long baselines is necessary for an unambiguous physical picture of accretion phenomena, and is only possible from space.
Krista Lynne Smith
doaj   +1 more source

Distribution of Faraday Rotation Measure in Jets from Active Galactic Nuclei. II. Prediction from Our Sweeping Magnetic Twist Model for the Wiggled Parts of Active Galactic Nucleus Jets and Tails [PDF]

, 2004
Hiromitsu Kigure, Yutaka Uchida, Toshikazu Nakamura, Shigenobu Hirose, R. H. Cameron   +4 more
openalex   +1 more source

Active Galactic Nucleus Feedback in Quiescent Galaxies at Cosmic Noon Traced by Ionized Gas Emission

The Astrophysical Journal
We analyze ionized gas emission lines in deep rest-frame optical spectra of 14 massive ( $\mathrm{log}{M}_{* }\gt 10.2$ M _⊙ ) quiescent galaxies at redshifts 1.7 
Letizia Bugiani, Sirio Belli, Minjung Park, Rebecca L. Davies, J. Trevor Mendel, Benjamin D. Johnson, Amir H. Khoram, Chloë Benton, Andrea Cimatti, Charlie Conroy, Razieh Emami, Joel Leja, Yijia Li, Gabriel Maheson, Elijah P. Mathews, Rohan P. Naidu, Erica J. Nelson, Sandro Tacchella, Bryan A. Terrazas, Rainer Weinberger   +19 more
doaj   +1 more source

Asymmetric eROSITA bubbles as the evidence of a circumgalactic medium wind. [PDF]

Nat Commun, 2023
Mou G, Sun D, Fang T, Wang W, Zhang R, Yuan F, Sofue Y, Wang T, He Z.   +8 more
europepmc   +1 more source