Results 111 to 120 of about 6,292 (222)

Comparing Observed Properties of Winds in Low-luminosity Active Galactic Nuclei with Theoretical Predictions

The Astrophysical Journal
Theoretical and numerical simulations of black hole hot accretion flows have shown the ubiquitous existence of winds and predicted their properties, such as velocity and mass flux.
Fangzheng Shi, Feng Yuan, Francesco Tombesi, Fu-guo Xie   +3 more
doaj   +1 more source

ReveaLLAGN 0: First Look at JWST MIRI Data of Sombrero and NGC 1052

The Astrophysical Journal
We present the first results from the Revealing Low-Luminosity Active Galactic Nuclei (ReveaLLAGN) survey, a JWST survey of seven nearby LLAGNs. We focus on two observations with the Mid-Infrared Instrument (MIRI)’s Medium-Resolution Spectrometer of the ...
Kameron Goold, Anil Seth, Mallory Molina, David Ohlson, Jessie C. Runnoe, Torsten Böker, Timothy A. Davis, Antoine Dumont, Michael Eracleous, Juan Antonio Fernández-Ontiveros, Elena Gallo, Andy D. Goulding, Jenny E. Greene, Luis C. Ho, Sera B. Markoff, Nadine Neumayer, Richard M. Plotkin, Almudena Prieto, Shobita Satyapal, Glenn van de Ven, Jonelle L. Walsh, Feng Yuan, Anja Feldmeier-Krause, Kayhan Gültekin, Sebastian Hönig, Allison Kirkpatrick, Nora Lützgendorf, Amy E. Reines, Jay Strader, Jonathan R. Trump, Karina T. Voggel   +30 more
doaj   +1 more source

Probing The Central Engines Of Low-Luminosity Active Galactic Nuclei

, 2013
I give a brief review of the observational properties of low-luminosity AGNs (LLAGNs). I outline some unresolved issues in the study of LLAGNs, emphasizing the uncertainties in the role of the truncated thin accretion disk, the dusty obscuring torus and the origin of high-energy radiation (X-rays and gamma-rays).
openaire   +2 more sources

Variability-selected Low-luminosity Active Galactic Nuclei Candidates in the 7 Ms Chandra Deep Field-South [PDF]

, 2018
In deep X-ray surveys, active galactic nuclei (AGNs) with a broad range of luminosities have been identified. However, cosmologically distant low-luminosity AGN (LLAGN, LX ≲ 10 42 erg s-1) identification still poses a challenge because of significant ...
Zheng, X. C., Gu, Q. S., Ding, N., Brandt, W. N., Vignali, C., Yang, G., Shemmer, O., Xue, Y. Q., TOZZI, Paolo, Lehmer, B. D., Schneider, D. P., Paolillo, Maurizio, Paolillo, M., Luo, B., Koekemoer, A. M., Wang, J. X., Tozzi, P., Vito, F.   +17 more
core   +1 more source

Mid-infrared Variability from the Central Point Source as Direct Evidence for Obscured Low-luminosity Nuclear Activity in the Nearby Edge-on Galaxy IC 2207

The Astrophysical Journal
Reliable identification of ongoing nuclear activity in nearby galaxies is challenging when central regions are heavily obscured, especially for low-luminosity active galactic nuclei (AGN) whose emission can also be contaminated by the host galaxy.
Yifei Xiong, Lei Hao, Zhenzhen Li, Hongyan Zhou   +3 more
doaj   +1 more source

Studies of Low Luminosity Active Galactic Nuclei with Monte Carlo and Magnetohydrodynamic Simulations

, 2012
Results from several studies are presented which detail explorations of the physical and spectral properties of low luminosity active galactic nuclei.
Hilburn, Guy
core  

4MOST Consortium Survey 6: Active galactic nuclei

, 2019
X-ray and mid-infrared emission are signposts of the accretion of matter onto the supermassive black holes that reside at the centres of most galaxies.
McMahon, R., Wisotzki, L., Worseck, G., Shanks, T., Rosario, D., Boller, T., Dwelly, T., Fotopoulou, S., Croom, S., Steinmetz, M., Alexander, D., Finoguenov, A., Comparat, J., Alexander, D. A., Merloni, A., Krumpe, M., Salvato, M., Banerji, M., Nandra, K., Schwope, A., Lamer, G.   +20 more
core   +1 more source

VLBI Imaging of Parsec-scale Radio Structures in Nearby Low-luminosity Active Galactic Nuclei

The Astrophysical Journal Supplement Series
We report the results of high-resolution 5 GHz Very Long Baseline Array and European VLBI Network observations of 36 nearby galaxies, an extension of the Legacy e-MERLIN Multi-band Imaging of Nearby Galaxies survey.
Xiaopeng Cheng, Tao An, Willem A. Baan, Ranieri D. Baldi, David R. A. Williams-Baldwin, Bong Won Sohn, Robert Beswick, Ian M. McHardy   +7 more
doaj   +1 more source

Relation between radio core length and black hole mass for active galactic nuclei

, 2002
We explore the relation between the linear length of radio core and the central black hole mass for a sample of radio-loud active galactic nuclei (AGNs). An empirical relation between the size of the broad line region (BLR) and optical luminosity is used
Jiang, DR, Cao, XW
core  

The Nuclear Infrared Emission of Low-Luminosity AGN [PDF]

, 2012
We have obtained high-resolution mid-infrared (MIR) imaging, nuclear spectral energy distributions (SEDs) and archival Spitzer spectra for 22 low-luminosity active galactic nuclei (LLAGN; Lbol < 5 x 10⁴² erg s⁻¹).
Itziar Aretxaga
core