Results 51 to 60 of about 90,767 (300)

Modeling Nearby Low-Luminosity Active-Galactic-Nucleus Jet Images at All VLBI Scales

Galaxies, 2022
Relativistic jets from nearby low-luminosity active-galactic-nuclei (LLAGN) were observed by Very-Long Baseline Interferometry (VLBI) across many orders of magnitude in space, from milliparsec to sub-parsec scales, and from the jet base in the vicinity ...
Hung-Yi Pu, Keiichi Asada, Masanori Nakamura   +2 more
doaj   +1 more source

GIANT GAMMA-RAY BUBBLES FROMFERMI-LAT: ACTIVE GALACTIC NUCLEUS ACTIVITY OR BIPOLAR GALACTIC WIND? [PDF]

The Astrophysical Journal, 2010
Data from the Fermi-LAT reveal two large gamma-ray bubbles, extending 50° above and below the Galactic center (GC), with a width of about 40° in longitude. The gamma-ray emission associated with these bubbles has a significantly harder spectrum (dN/dE ~ E –2) than the inverse Compton emission from electrons in the Galactic disk, or the gamma rays ...
Su, Meng, Slatyer, Tracy R., Finkbeiner, Douglas P.   +2 more
openaire   +3 more sources

A direct image of the obscuring disk surrounding an active galactic nucleus [PDF]

, 1997
Active galactic nuclei (AGN) are generally accepted to be powered by the release of gravitational energy in a compact accretion disk surrounding a massive black hole. Such disks are also necessary to collimate powerful radio jets seen in some AGN.
A Capetti, A Efstathiou, A Lawrence, A Lawrence, CF Reynolds, Christopher P. O'Dea, DA Neufeld, DB Sanders, EA Pier, EA Pier, G Ferland, Jack F. Gallimore, JE Gunn, JF Gallimore, JF Gallimore, JF Gallimore, JH Krolik, JH Krolik, JH Krolik, JS Mulchaey, KI Kellerman, MC Begelman, MC Begelman, MJ Rees, PG Mezger, RRJ Antonucci, RRJ Antonucci, S Ueno, Stefi A. Baum, T Cornwell, TWB Muxlow   +30 more
core   +2 more sources

A Diverse Population of z ∼ 2 ULIRGs Revealed by JWST Imaging

The Astrophysical Journal, 2023
Four ultraluminous infrared galaxies (ULIRGs) observed with JWST/NIRcam in the Cosmos Evolution Early Release Science program offer an unbiased preview of the z ∼ 2 ULIRG population.
J.-S. Huang, Zi-Jian Li, Cheng Cheng, Meicun Hou, Haojing Yan, S. P. Willner, Y.-S. Dai, X. Z. Zheng, J. Pan, D. Rigopoulou, T. Wang, Zhiyuan Li, Piaoran Liang, A. Esamdin, G. G. Fazio   +14 more
doaj   +1 more source

A Long Decay of X-Ray Flux and Spectral Evolution in the Supersoft Active Galactic Nucleus GSN 069 [PDF]

, 2018
GSN 069 is an optically identified very low-mass active galactic nuclei (AGN) that shows supersoft X-ray emission. The source is known to exhibit a huge X-ray outburst, with flux increased by more than a factor of ∼240 compared to the quiescence state ...
Xinwen Shu, Shaoshao Wang, L. Dou, Ning Jiang, Junxian Wang, Tinggui Wang   +5 more
semanticscholar   +1 more source

Atomic gas fractions in active galactic nucleus host galaxies [PDF]

Monthly notices of the Royal Astronomical Society, 2018
The feedback from an active galactic nucleus (AGN) is frequently invoked as a mechanism through which gas can be heated or removed from a galaxy. However, gas fraction measurements in AGN hosts have yielded mixed support for this scenario.
S. Ellison, T. Brown, B. Catinella, L. Cortese   +3 more
semanticscholar   +1 more source

Dissecting the active galactic nucleus in Circinus, I : peculiar mid-IR morphology explained by a dusty hollow cone [PDF]

, 2017
Recent high angular resolution observations resolved for the first time the mid-infrared (MIR) structure of nearby active galactic nuclei (AGN). Surprisingly, they revealed that a major fraction of their MIR emission comes from the polar regions. This is
M. Stalevski, D. Asmus, K. Tristram
semanticscholar   +1 more source

Active Galactic Nucleus Feedback in an Elliptical Galaxy with the Most Updated AGN Physics. II. High Angular Momentum Case [PDF]

Astrophysical Journal, 2017
This is the second paper of our series of works of studying the effects of active galactic nuclei (AGNs) feedback on the cosmological evolution of an isolated elliptical galaxy by performing two-dimensional hydrodynamical simulations.
D. Yoon, F. Yuan, Z. Gan, J. Ostriker, Ya-Ping Li, L. Ciotti   +5 more
semanticscholar   +1 more source

Powerful mechanical-driven outflows in the central parsecs of the low-luminosity active galactic nucleus ESO 428-G14 [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2018
Low-luminosity Active Galactic Nuclei (LLAGNs) are characterized for low-radiative efficiency, much less than one percent of their Eddington limit. Nevertheless, their main energy release may be mechanical, opposite to powerful AGN classes like Seyfert ...
D. May, A. Rodríguez-Ardila, A. Prieto, J. A. Fern'andez-Ontiveros, Y. Diaz, X. Mazzalay   +5 more
semanticscholar   +1 more source

New Conformally Invariant Born–Infeld Models and Geometrical Currents

Physics
A new conformally invariant gravitational generalization of the Born–Infeld (BI) model is proposed and analyzed from the point of view of symmetries. Taking a geometric identity involving the determinant functions detfBμν, Fμν with the Bach Bμν and the ...
Diego Julio Cirilo-Lombardo
doaj   +1 more source