Lambda = 3 mm line survey of nearby active galaxies [PDF]
, 2015 We used the IRAM 30m telescope to observe the frequency range [86-116]GHz towards the central regions of the starburst galaxies M83, M82, and NGC253, the AGNs M51, NGC1068, and NGC7469, and the ULIRGs Arp220 and Mrk231.
R. Aladro +10 more
semanticscholar +1 more source
Combining LOFAR and Apertif Data for Understanding the Life Cycle of Radio Galaxies
Galaxies, 2021 Active galactic nuclei (AGN) at the centres of galaxies can cycle between periods of activity and of quiescence. Characterising the duty-cycle of AGN is crucial for understanding their impact on the evolution of the host galaxy.
Raffaella Morganti +12 more
doaj +1 more source
NON-THERMAL RADIATION FROM COLLISIONS OF COMPACT OBJECTS WITH INTERMEDIATE-SCALE JETS IN ACTIVE GALAXIES [PDF]
, 2015 Massive black holes in active galaxies are immersed in huge concentrations of late-type stars in the galactic bulges and also early-type massive stars in the nuclear stellar clusters, which are additionally surrounded by quasi-spherical halos on a scale ...
W. Bednarek, P. Banasiński
semanticscholar +1 more source
COSMIC EVOLUTION OF BLACK HOLES AND SPHEROIDS. V. THE RELATION BETWEEN BLACK HOLE MASS AND HOST GALAXY LUMINOSITY FOR A SAMPLE OF 79 ACTIVE GALAXIES [PDF]
, 2014 We investigate the cosmic evolution of the black hole (BH) mass–bulge luminosity relation using a sample of 52 active galaxies at z ∼ 0.36 and z ∼ 0.57 in the BH mass range of 107.4–109.1 M☉.
Daeseong 대성 Park 박 +5 more
semanticscholar +1 more source
A LOCAL BASELINE OF THE BLACK HOLE MASS SCALING RELATIONS FOR ACTIVE GALAXIES. III. THE MBH–σ RELATION [PDF]
, 2014 We create a baseline of the black hole (BH) mass ( M BH ?> )—stellar-velocity dispersion (σ) relation for active galaxies, using a sample of 66 local ( 0.02 < z < 0.09 ?> ) Seyfert-1 galaxies, selected from the Sloan Digital Sky Survey (SDSS).
V. Bennert +8 more
semanticscholar +1 more source
Galaxies, 2021 Radio galaxies are known to undergo phases of activity, where the stage after the jets have switched off is referred to as the remnant phase. This state can be followed by a restarted phase when the activity reignites. Remnant and restarted radio sources
Nika Jurlin +3 more
doaj +1 more source
THE BLACK HOLE MASS SCALE OF CLASSICAL AND PSEUDO BULGES IN ACTIVE GALAXIES [PDF]
, 2014 The mass estimator used to calculate black hole (BH) masses in broad-line active galactic nuclei (AGNs) relies on a virial coefficient (the “f factor”) that is determined by comparing reverberation-mapped (RM) AGNs with measured bulge stellar velocity ...
L. Ho +5 more
semanticscholar +1 more source
SEDs and Beaming Effect for Fermi Blazars [PDF]
Journal of Astronomy and Space Sciences, 2016 In this work, based on our previous calculations of spectral energy distributions for a sample of Fermi blazars (Fan et al. 2015a), we calculated the radio loudness and performed correlation analyses.
Jun-Hui Fan +5 more
doaj +1 more source
High-Frequency and High-Resolution VLBI Observations of GHz Peaked Spectrum Objects
Galaxies, 2023 Observational studies of GHz peaked spectrum (GPS) sources contribute to the understanding of the radiative properties and interstellar environment of host galaxies.
Xiaopeng Cheng +3 more
doaj +1 more source
The host galaxies and classification of active galactic nuclei [PDF]
, 2006 We present an analysis of the host properties of 85224 emission-line galaxies selected from the Sloan Digital Sky Survey. We show that Seyferts and LINERs form clearly separated branches on the standard optical diagnostic diagrams.
L. Kewley +5 more
semanticscholar +1 more source