Results 51 to 60 of about 152,801 (176)
, 1999 The contributions that BeppoSAX is expected to give and, after one and a half year of operation, has already given, to our knowledge of both type 1 and type 2 Seyfert galaxies are outlined and ...
Giorgio Matt, MATT, Giorgio
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Seyfert galaxies in the infrared
, 1997 This thesis contains complementary aspects of the Seyfert phenomenon, each of which is analysed to bring a better understanding of present unification theories.
Ruiz-Nishiky, Milagros
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The Astrophysical JournalWe performed a comprehensive analysis of flux and color variability in a redshift-matched sample of Seyfert galaxies, comprising 23 gamma-ray-detected narrow-line Seyfert 1 galaxies (gNLS1s), 190 non-gamma-ray-detected narrow-line Seyfert 1 galaxies ...
Vineet Ojha, Xue-Bing Wu, Luis C. Ho
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Extended Narrow-Line Region in Seyfert Galaxies
Frontiers in Astronomy and Space Sciences, 2017 We present our recent results about the extended narrow-line region (ENLR) of two nearby Seyfert 2 galaxies (IC 5063 and NGC 7212) obtained by modeling the observed line profiles and spectra with composite models (photoionization+shocks) in the different
Enrico Congiu +10 more
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The difference between the narrow-line regions of Seyfert 1 and Seyfert 2 galaxies [PDF]
, 1998 This paper presents a comparative study of emission-line ratios of the narrow-line regions (NLRs) of Seyfert 1 and Seyfert 2 galaxies. It includes a literature compilation of the emission-line fluxes [O II] λ3727, [Ne III] λ3869, [O III] λ5007, and [Ne V]
Schmitt, Henrique Roberto
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Detection of Variability in Seyfert 2 Galaxies and Measurement of the Optical Scattering Region Size
The Astrophysical JournalOne main theme of the Unification Model of active galactic nuclei (AGNs) is that there is an obscuring torus structure blocking the direct view of the central engine for Seyfert 2 galaxies.
Natalie Kovacevic +7 more
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Dense molecular gas in Seyfert galaxies?
, 1999 multaneously with CS J = 3! 2 at SEST) transitions in 20 Seyfert galaxies. The sample consists of the 18 galaxies detected in CO J = 1! 0 by Heckman et al. (1989) plus 2 which were not detected in their survey.
R. S. Booth, S. J. Curran, S. Aalto
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ON THE EXCESS OF PHYSICAL COMPANIONS AMONG SEYFERT GALAXIES
, 1995 The results of a search for close companions in two magnitude limited samples (mB less than or equal to 15.5) of 99 Seyfert 1 and 98 Seyfert 2 galaxies are presented. It is found that there is an excess of physical companions in both samples of galaxies,
VIOLATO M. +2 more
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Narrow-line Seyfert 1 Galaxies in the Dark Energy Spectroscopic Instrument Data Release 1
The Astrophysical Journal Supplement SeriesNarrow-line Seyfert 1 (NLSy1) galaxies are peculiar active galactic nuclei (AGN) known to exhibit a variety of intriguing observational features from low-frequency radio waves to high-energy γ -rays.
Vaidehi S. Paliya +4 more
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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
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