Results 51 to 60 of about 160 (135)

Spectroscopy of the galaxy components of N and Seyfert galaxies [PDF]

Publications of the Astronomical Society of the Pacific, 1987
Nuclear and off-nuclear spectra of nine active galaxies are presented. The sample consists of four Seyfert galaxies, two N galaxies, one Seyfert radio galaxy, and one liner/Seyfert 2 galaxy. All of the objects show continuum emission off the nucleus. Four clearly show absorption features from a stellar population.
Todd A. Boroson, J. B. Oke
openaire   +1 more source

COMPTEL upper limits for Seyfert galaxies

AIP Conference Proceedings, 1994
The gamma‐ray emission of Seyfert galaxies has fallen far short of pre‐GRO expectations. No single object of this class has been detected by either COMPTEL or EGRET, and OSSE has detected only a fraction of the Seyferts expected. To derive a more stringent upper limit to the emission from these objects in the energy ranges 0.75 to 1 and 1 to 3 MeV, we ...
Maisack, M, Collmar, W, Lichti, G G, Schonfelder, V, Steinle, H, Bloemen, H, Hermsen, W, McConnell, Mark L, Stacy, G, Barr, P, Williams, O R   +10 more
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The radio properties of bright Seyfert galaxies

The Astrophysical Journal Supplement Series, 1990
The radio properties of a sample of 69 bright spectroscopically selected Seyfert galaxies, which suffers from little bias toward Markarian galaxies with strong UV excess. At variance with most of the earlier results, generally based on galaxy samples which are strongly biased toward the inclusion of Markarian objects, there is no clear evidence of a ...
GIURICIN G, MARDIROSSIAN, FABIO, MEZZETTI, MARINO, BERTOTTI G.   +3 more
openaire   +2 more sources

Optical colour maps of Seyfert galaxies [PDF]

Astronomy and Astrophysics Supplement Series, 1998
9 pages, 26 figures, LaTeX, uses l-aa.sty, psfig.sty. A&AS, accepted. Grayscale JPEGs included, original color figures (gif or ps format) can be obtained only by anonymous ftp from ftp://oj287.astro.utu.fi/pub ...
openaire   +2 more sources

Spectra of Seyfert galaxies and Seyfert galaxy candidates

The Astrophysical Journal, 1983
D. E. Osterbrock, O. Dahari
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Narrow-Line Seyfert 1 Galaxies

, 2007
To appear in the proceedings of "The nuclear region, host galaxy and environment of AGN", E. Benitez, I. Cruz-Gonzalez & Y.
openaire   +3 more sources

Unification Model of Seyfert Galaxies: Are All Seyfert 2 Galaxies Created Equal?

, 2002
2 pages, 2 figures to be published in the proceedings of "Active Galactic Nuclei: From Central Engine to Host Galaxy", Meudon, France, 23-27 July, 2002, ASP Conference Series, Eds. S. Collin, F.
openaire   +2 more sources

The polarization of Seyfert galaxies

The Astrophysical Journal, 1983
P. G. Martin, I. B. Thompson, J. Maza, J. R. P. Angel   +3 more
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Variable Nature of Magnetically-Driven Ultra-Fast Outflows. [PDF]

Astrophys J Lett, 2018
Fukumura K, Kazanas D, Shrader C, Behar E, Tombesi F, Contopoulos I.   +5 more
europepmc   +1 more source

Little red dots as young supermassive black holes in dense ionized cocoons. [PDF]

Nature
Rusakov V, Watson D, Nikopoulos GP, Brammer G, Gottumukkala R, Harvey T, Heintz KE, Damgaard R, Sim SA, Sneppen A, Vijayan AP, Adams N, Austin D, Conselice CJ, Goolsby CM, Toft S, Witstok J.   +16 more
europepmc   +1 more source