Results 71 to 80 of about 184,376 (200)
Estimation of Central Black Hole Masses in Low-Luminosity Active Galactic Nuclei [PDF]
Publications of the Astronomical Society of Japan, 2001 Abstract We analyzed six low-luminosity active galactic nuclei (hereafter LLAGNs), which consist of two bright LINERs (low-ionization nuclear emission line region) with broad H$ \alpha$, and of four bright low-luminosity Seyferts observed by the X-ray satellite ASCA.
Hisamitsu Awaki +3 more
openaire +2 more sources
Dust in Active Galactic Nuclei [PDF]
arXiv, 2008 Dust plays an essential role in the unification theory of active galactic nuclei (AGNs). This review summarizes our current understanding of the extinction and infrared emission properties of the circumnuclear dust in AGNs as well as the inferred dust composition and size distribution.
arxiv
The Astrophysical JournalWe report on follow-up observations of the Seyfert 1.9 galaxy IC 3599 with the NASA Neil Gehrels Swift mission. The detection of a second X-ray outburst in 2010 by Swift after the first discovery of a bright X-ray outburst in 1990 by ROSAT led to the ...
Dirk Grupe, S. Komossa, Salem Wolsing
doaj +1 more source
Kinematics and Collimation of the Two-sided Jets in NGC 4261: VLBI Study on Subparsec Scales
The Astrophysical Journal, 2023 We report multifrequency VLBI studies of the subparsec scale structure of the two-sided jets in the nearby radio galaxy NGC 4261. Our analyses include new observations using the source frequency phase referencing technique with the Very Long Baseline ...
Xi Yan +4 more
doaj +1 more source
The wavelength dependence of polarization in active galactic nuclei [PDF]
arXiv, 2003 Using the gaseous disk model and the condition for emission based on a stimulated origin of thermal radio emission (Prigara 2003), we received the wavelength dependence of polarization for radio emission from active galactic nuclei consistent with available observational data.
arxiv
The Galactic Center compared with nuclei of nearby galaxies [PDF]
, 2016 Understanding our Galactic Center is easier with insights from nearby galactic nuclei. Both the star formation activity in nuclear gas disks, driven by bars and nuclear bars, and the fueling of low-luminosity AGN, followed by feedback of jets, driving molecular outflows, were certainly present in our Galactic Center, which now appears to be quenched ...
arxiv +1 more source
The Astrophysical Journal, 2023 We identify the intrinsic dependence of star formation quenching on a variety of galactic and environmental parameters, utilizing a machine-learning approach with Random Forest classification.
Asa F. L. Bluck +2 more
doaj +1 more source
The cosmic ray luminosity of the nearby active galactic nuclei [PDF]
arXiv, 2008 The pointing directions of extensive air showers observed at the Pierre Auger Observatory were fitted within 3.1 degree with positions of the nearby active galactic nuclei from the Veron-Cetty and P. Veron catalog. The cosmic ray luminosity of the active galactic nuclei which happened to be a source of the particular cosmic ray event constitutes a ...
arxiv