Results 41 to 50 of about 6,087 (169)
Spitzer spectra of Seyfert galaxies
, 2009 to appear in the proceedings of "The Starburst-AGN Connection Conference", Shanghai, China, 27 Oct - 1 Nov 2008, ASP Conference ...
Spinoglio, Luigi +3 more
openaire +3 more sources
HNC, HCN and CN in Seyfert galaxies [PDF]
Astronomy & Astrophysics, 2007 Accepted for publication in A&A. A selection of this paper will be presented as a poster in the FIR workshop 2007, held at Bad Honnef, Germany. High resolution figures in original paper.
Susanne Aalto +3 more
openaire +4 more sources
Clustering of X‐Ray‐Selected AGN
Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012 The study of the angular and spatial structure of the X‐ray sky has been under investigation since the times of the Einstein X‐ray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario regarding the consequences of the angular and spatial distribution of X‐ray sources.
N. Cappelluti +3 more
wiley +1 more source
Seyfert galaxies in UZC-Compact Groups [PDF]
Astronomy & Astrophysics, 2004 We present results concerning the occurrence of Seyfert galaxies in a new automatically selected sample of nearby Compact Groups of galaxies (UZC-CGs). Seventeen Seyferts are found, constituting ~3% of the UZC-CG galaxy population. CGs hosting and non-hosting a Seyfert member exhibit no significant differences, except that a relevant number of Sy2 is ...
KELM, BIRGIT, FOCARDI, PAOLA, ZITELLI V.
openaire +4 more sources
Symposium - International Astronomical Union, 1989 We present data for Seyfert and normal galaxies in the Revised Shapley-Ames Catalog. The type 2 Seyferts are stronger CO and Far-IR emitters (by factors of 2–4) than either normal galaxies or type 1 Seyferts. The Seyfert CO line-widths correlate with both the 21cm HI and [OIII]5007 line-widths.
openaire +1 more source
THE MID-INFRARED CONTINUA OF SEYFERT GALAXIES [PDF]
The Astrophysical Journal, 2009 25 pages, 3 tables, 11 figures; Accepted for Publication in Nov.
Steven B. Kraemer +3 more
openaire +2 more sources
Hidden starbursts in Seyfert 1 galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 5 pages, 1 figure.
S. Viegas, A. Rodriguez-Ardila
openaire +4 more sources
On X‐Ray Variability in Seyfert Galaxies [PDF]
The Astrophysical Journal, 1999 11 pages, 1 figure 1 table. LaTeX with encapsulated postscript. Accepted for publication in the Astrophysical Journal. Replaced first version to fix a printing problem caused by the figure.
Ian M. George +6 more
openaire +3 more sources
The Astrophysical Journal, 2001 It is known that the spectral energy distribution (SED) of the nuclear radiation of narrow-line Seyfert 1 galaxies (NLS1s) has different shapes with respect to that of ordinary broad-line Seyfert 1 galaxies (BLS1s), particularly in wavelengths of X-ray.
Yoshiaki Taniguchi +2 more
openaire +3 more sources
Seyfert 2 Galaxies with Spectropolarimetric Observations [PDF]
Symposium - International Astronomical Union, 2002 We compare Seyfert 2 galaxies(Sy2s) with detected polarized broad emission lines(PBL) with Sy2s without detected PBL and find that the majority of Sy2s without PBL are those sources with less powerful AGN activity, most likely caused by low accretion rates.
Qiusheng Gu, Jie-Hao Huang
openaire +5 more sources