Results 31 to 40 of about 90,767 (300)
ULTRAFAST OUTFLOWS: GALAXY-SCALE ACTIVE GALACTIC NUCLEUS FEEDBACK [PDF]
The Astrophysical Journal, 2013 We show, using global 3D grid-based hydrodynamical simulations, that Ultra Fast Outflows (UFOs) from Active Galactic Nuclei (AGN) result in considerable feedback of energy and momentum into the interstellar medium (ISM) of the host galaxy. The AGN wind interacts strongly with the inhomogeneous, two-phase ISM consisting of dense clouds embedded in a ...
Wagner, A. Y. +2 more
openaire +3 more sources
Evolution of Retrograde Orbiters in an Active Galactic Nucleus Disk [PDF]
, 2020 Active galactic nucleus (AGN) disks have been proposed as promising locations for the mergers of stellar-mass black hole binaries (BBHs). Much recent work has been done on this merger channel, but the majority focuses on stellar-mass black holes (BHs ...
Amy Secunda +6 more
semanticscholar +1 more source
Active galactic nucleus feedback in NGC 3982
Astronomy & Astrophysics, 2022 The energetic feedback from supermassive black holes can influence star formation at the centres of galaxies. Observational evidence for active galactic nucleus (AGN) impact on star formation can be searched for in galaxies by combining ultraviolet imaging and optical integral field unit data. The ultraviolet flux directly traces recent star formation,
P. Joseph, K. George, K. T. Paul
openaire +2 more sources
A possible active galactic nucleus in M82? [PDF]
New Astronomy Reviews, 1999 MERLIN and VLA observations of the galaxy M82 have detected a jet-like elongated radio continuum feature emanating from one of the compact sources, 44.01+59.6, embedded in the starburst. The proximity of this source to the dynamical centre of M82 led us to suspect that it could be a weak active nucleus rather than a supernova remnant.
K. A. Wills +3 more
openaire +1 more source
Dissecting the active galactic nucleus in Circinus – II. A thin dusty disc and a polar outflow on parsec scales [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Recent observations which resolved the mid-infrared (MIR) emission of nearby active galactic nuclei (AGNs), surprisingly revealed that their dust emission appears prominently extended in the polar direction, at odds with the expectations from the ...
M. Stalevski, K. Tristram, D. Asmus
semanticscholar +1 more source
NGC 1808: active galactic nucleus or starburst? [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 We present optical and near-infrared images, together with long-slit spectra at red wavelengths, of NGC 1808. The complex morphology of hotspots seen at short wavelengths may be the result of dust obscuration. Our data (namely the equivalent width of the Ca II triplet and broad-band colours) suggest the presence of red supergiants, associated with a ...
D. A. Forbes, C. Boisson, M. J. Ward
openaire +1 more source
Black hole variability and the star formation-active galactic nucleus connection : do all star-forming galaxies host an active galactic nucleus? [PDF]
, 2014 We investigate the effect of active galactic nucleus (AGN) variability on the observed connection between star formation and black hole accretion in extragalactic surveys.
Alexander, D.M. +6 more
core +2 more sources
Discovery of an Mg ii Changing-look Active Galactic Nucleus and Its Implications for a Unification Sequence of Changing-look Active Galactic Nuclei [PDF]
Astrophysical Journal, 2019 Changing look (CL) is a rare phenomenon of active galactic nuclei (AGNs) that exhibit emerging or disappearing broad lines accompanied by continuum variations on astrophysically short timescales (≲1 yr to a few decades). While previous studies have found
H. Guo 郭 +7 more
semanticscholar +1 more source
ACTIVE GALACTIC NUCLEUS FEEDBACK WORKS BOTH WAYS [PDF]
The Astrophysical Journal, 2013 Simulations of galaxy growth need to invoke strong negative feedback from active galactic nuclei (AGNs) to suppress the formation of stars and thus prevent the over-production of very massive systems. While some observations provide evidence for such negative feedback, other studies find either no feedback or even positive feedback, with increased star
Zinn, Peter C. +3 more
openaire +2 more sources
FRAMEx. IV. Mechanical Feedback from the Active Galactic Nucleus in NGC 3079
The Astrophysical Journal, 2023 Using the Very Long Baseline Array, we observed the active galactic nucleus (AGN) in NGC 3079 over a span of six months to test for variability in the two main parsec-scale radio components, A and B , which lie on either side of the AGN.
Luis C. Fernandez +3 more
doaj +1 more source