The Nuclear Spectral Energy Distribution of NGC 4395, The Least Luminous Type 1 Seyfert Galaxy [PDF]
, 1999 We present X-ray (ROSAT), infrared, and radio observations of NGC 4395, which harbors the optically least luminous type 1 Seyfert nucleus discovered thus far.
Alexei V. Filippenko +13 more
core +2 more sources
Probing the Heart of an Active Galactic Nucleus: NGC 1068 [PDF]
Symposium - International Astronomical Union, 2001 We present results from integral field spectroscopy of the narrow line region of NGC 1068, carried out with the MPE 3D near infrared imaging spectrometer. A map and velocity field of the [Fe II] fine structure line at 1.64μm is presented. The kinematics of the [Fe II] emission, which arises in partially ionized zones, shows red shifted emission in the ...
Tecza, M, Thatte, N, Maiolino, R
openaire +3 more sources
ALMA captures feeding and feedback from the active galactic nucleus in NGC 613 [PDF]
Astronomy & Astrophysics, 2019 We report ALMA observations of CO(3–2) emission in the Seyfert/nuclear starburst galaxy NGC 613, at a spatial resolution of 17 pc, as part of our NUclei of GAlaxies (NUGA) sample.
A. Audibert +13 more
semanticscholar +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 +5 more
semanticscholar +1 more source
The parsec scale region of Active Galactic Nuclei in the IR [PDF]
, 2004 First results from the AGN-Heidelberg program aimed at spatially resolving the central pc region of the closest Active Galactic Nuclei are presented. The core region of prototype active nuclei are clearly unveiled at IR waves and at distances from the ...
Meisenheimer, Klaus, Prieto, M. Almudena
core +2 more sources
A Possible ∼20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-quiet Active Galactic Nucleus Ark 120 [PDF]
Astrophysical Journal Supplement Series, 2017 We study the long-term variability in the optical monitoring database of Ark 120, a nearby radio-quiet active galactic nucleus (AGN) at a distance of 143 Mpc (z = 0.03271). We compiled the historical archival photometric and spectroscopic data since 1974
Yan-Rong Li +17 more
semanticscholar +1 more source
Modeling the Spectral Energy Distribution of the Active Galactic Nucleus inside NGC 4395
The Astrophysical Journal, 2023 We study the broadband spectral energy distribution (SED) of the prototypical low-mass active galactic nucleus (AGN) in NGC 4395. We jointly model the optical through mid-IR SED with a combination of galaxy and AGN light, and find that on arcsecond ...
Hector Afonso G. Cruz +2 more
doaj +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 +5 more
semanticscholar +1 more source
THE IMPACT OF GALAXY INTERACTIONS ON ACTIVE GALACTIC NUCLEUS ACTIVITY IN zCOSMOS [PDF]
The Astrophysical Journal, 2011 Close encounters between galaxies are expected to be a viable mechanism, as predicted by numerical simulations, by which accretion onto supermassive black holes can be initiated. To test this scenario, we construct a sample of 562 galaxies (M*>2.5x10^10 M_sun) in kinematic pairs over the redshift range 0.25 < z < 1.05 that are more likely to ...
C. Knobel +55 more
openaire +6 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 +30 more
core +2 more sources