Seyfert galaxies in the local Universe (z ≤ 0.1) : the average X-ray spectrum as seen by BeppoSAX [PDF]
, 2008 The BeppoS AX archive is currently the largest reservoir of high sensitivity simultaneous soft and hard-X ray data of Seyfert galaxies. From this database all the Seyfert galaxies (105 objects of which 43 are type I and 62 are type II) with redshift ...
M. Dadina
semanticscholar +1 more source
Seyfert Galaxies with Circumnuclear/Nuclear Starbursts [PDF]
RevMexAA, 2001, 37,3-13, 2000 In this paper, we present our preliminary results on Seyfert galaxies with circumnuclear/nuclear starburst(SB) activity. We have searched the recent available literature and found 76 active galaxies with clear evidence of nuclear SB activity, among which 16 are Seyfert 1s, 51 Seyfert 2s, and 9 LINERs.
arxiv
Jetted Seyfert Galaxies at z = 0: Simulating Feedback Effects on Galactic Morphology and Beyond
The Astrophysical JournalWe use high-resolution cosmological zoom-in simulations to model feedback from Seyfert-type supermassive black hole (SMBH) jets onto galaxies with identical dark matter (DM) halos of log M / M _⊙ ∼ 11.8. The low-mass, ∼10 ^6 M _⊙ , seed SMBHs have been
Julianne Goddard +2 more
doaj +1 more source
REVERBERATION MAPPING MEASUREMENTS OF BLACK HOLE MASSES IN SIX LOCAL SEYFERT GALAXIES [PDF]
, 2010 We present the final results from a high sampling rate, multi-month, spectrophotometric reverberation mapping campaign undertaken to obtain either new or improved Hβ reverberation lag measurements for several relatively low-luminosity active galactic ...
K. Denney +51 more
semanticscholar +1 more source
Dust lanes, thick absorbers, and the unification model for Seyfert galaxies [PDF]
arXiv, 2000 A modification of the popular unification model for Seyfert galaxies is proposed, which takes into account recent observational findings on the statistical properties of both type 1 and type 2 Seyferts. In the proposed scenario, Compton-thick Seyfert 2 galaxies are those sources observed through compact, thick matter (the `torus'), while Compton-thin ...
arxiv
Mapping the Narrow-Line Seyfert 1 Galaxy 1H 0323+342
Universe, 2019 Taking advantage of the most recent measurements by means of high-resolution radio observations and other multiwavelength campaigns, it is possible to elaborate a detailed map of the narrow-line Seyfert 1 Galaxy 1H 0323 + 342 .
Luigi Foschini +5 more
doaj +1 more source
MULTI-WAVELENGTH PROBES OF OBSCURATION TOWARD THE NARROW-LINE REGION IN SEYFERT GALAXIES [PDF]
, 2010 We present a study of reddening and absorption toward the narrow line regions (NLRs) in active galactic nuclei (AGNs) selected from the Revised Shapley-Ames, 12 μm, and Swift/Burst Alert Telescope samples.
S. Kraemer +7 more
semanticscholar +1 more source
Is the cluster environment quenching the Seyfert activity in elliptical and spiral galaxies? [PDF]
Monthly notices of the Royal Astronomical Society, 2016 We developed a hierarchical Bayesian model (HBM) to investigate how the presence of Seyfert activity relates to their environment, herein represented by the galaxy cluster mass, $M_{200}$, and the normalized cluster-centric distance, $r/r_{200}$.
R. S. Souza +10 more
semanticscholar +1 more source
Intensive Broadband Reverberation Mapping of Fairall 9 with 1.8 yr of Daily Swift Monitoring
The Astrophysical JournalWe present 1.8 yr of near-daily Swift monitoring of the bright, strongly variable Type 1 active galactic nucleus (AGN) Fairall 9. Totaling 575 successful visits, this is the largest such campaign reported to date.
R. Edelson +7 more
doaj +1 more source
A MULTI-WAVELENGTH STUDY OF THE NATURE OF TYPE 1.8/1.9 SEYFERT GALAXIES [PDF]
, 2010 We focus on determining the underlying physical cause of a Seyfert galaxy's appearance as type 1.8 or 1.9. Are these “intermediate” Seyfert types typical Seyfert 1 nuclei with reddened broad-line regions?
M. Trippe +7 more
semanticscholar +1 more source