Results 41 to 50 of about 261,296 (275)

The Kiloparsec-scale Influence of the AGN in NGC 1068 with SALT RSS Fabry–Pérot Spectroscopy

The Astronomical Journal, 2023
We present Fabry–Pérot (FP) imaging and longslit spectroscopy of the nearby Seyfert II galaxy NGC 1068 using the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT) to observe the impact of the central active galactic nucleus (
Raphael E. Hviding, Ryan C. Hickox, Petri Väisänen, Rajin Ramphul, Kevin N. Hainline   +4 more
doaj   +1 more source

Spitzer/IRS 5-35 um Low-Resolution Spectroscopy of the 12 um Seyfert Sample [PDF]

, 2009
We present low-resolution 5.5-35 um spectra for 103 galaxies from the 12 um Seyfert sample, a complete unbiased 12 um flux limited sample of local Seyfert galaxies selected from the IRAS Faint Source Catalog, obtained with the Infrared Spectrograph (IRS)
Antonucci, Armus, Armus, Bassani, Bernard-Salas, Brand, Brandl, Buchanan, Calzetti, Calzetti, Charmandaris, Clavel, Cohen, Contursi, Deo, Desai, Draine, Dudley, Efstathiou, Engelbracht, Farrah, Genzel, Gorjian, Hao, Hao, Hao, Houck, Houck, Houck, Jiasheng Huang, Laurent, Le Floc'h, Luigi Spinoglio, Lutz, Maiolino, Markwardt, Meléndez, Meléndez, Nardini, Nenkova, Peeters, Sajina, Sanders, Schaerer, Shi, Shu, Silvia Tommasin, Sirocky, Smith, Spoon, Stern, Sturm, Sturm, Teplitz, Thompson, Tommasin, Vassilis Charmandaris, Voit, Weedman, Weedman, Weedman, Werner, Wu, Yan, Yanling Wu   +64 more
core   +3 more sources

Simultaneous X-ray and optical observations of true type 2 Seyfert galaxies [PDF]

, 2012
We present the results of a campaign of simultaneous X-ray and optical observations of ‘true’ type 2 Seyfert galaxies candidates, i.e. active galactic nuclei without a broad-line region (BLR).
S. Bianchi, F. Panessa, X. Barcons, F. Carrera, F. Franca, G. Matt, F. Onori, A. Wolter, A. Corral, L. Monaco, A. Ruiz, M. Brightman   +11 more
semanticscholar   +1 more source

X-ray perspective of Narrow-line Seyfert 1 galaxies [PDF]

Proceedings of Revisiting narrow-line Seyfert 1 galaxies and their place in the Universe — PoS(NLS1-2018), 2018
It is arguably in the X-ray regime that Narrow-line Seyfert 1 galaxies (NLS1s) exhibit the most extreme behaviour. Spectral complexity, rapid and large amplitude flux variations, and exceptional spectral variability are well known characteristics ...
L. Gallo
semanticscholar   +1 more source

Recent Results from the SAFIR Project

Acta Polytechnica CTU Proceedings, 2014
The "Seyfert and star formation Activity in the Far-Infrared" (SAFIR) project is aimed at studying the physical nature of the nuclear IR emission and star formation properties of a small sample of nearby Seyfert galaxies observed with the PACS and SPIRE ...
M. Sánchez-Portal, M. Castillo-Fraile, C. Ramos Almeida, P. Esquej, A. Alonso-Herrero, A. M. Pérez García, J. Acosta-Pulido, B. Altieri, A. Bongiovanni, J. M. Castro Céron, J. Cepa, D. Coia, L. Conversi, J. Fritz, J. I. Gonzalez-Serrano, E. Hatziminaoglou, M. Povic, J. M. Rodrguez Espinosa, I. Valtchanov   +18 more
doaj   +1 more source

Spectral properties of the narrow‐line region in Seyfert galaxies selected from the SDSS‐DR7 [PDF]

, 2012
Although the properties of the narrow-line region (NLR) of active galactic nuclei (AGN) have been deeply studied by many authors in the past three decades, many questions are still open.
L. Vaona, S. Ciroi, F. D. Mille, V. Cracco, G. L. Mura, P. Rafanelli   +5 more
semanticscholar   +1 more source

What We Talk about When We Talk about Blazars?

Frontiers in Astronomy and Space Sciences, 2017
After the discovery of powerful relativistic jets from Narrow-Line Seyfert 1 Galaxies, and the understanding of their similarity with those of blazars, a problem of terminology was born.
Luigi Foschini
doaj   +1 more source

The Relative Orientation of Nuclear Accretion and Galaxy Stellar Disks in Seyfert Galaxies [PDF]

, 1999
We use the difference (delta) between the position angles of the nuclear radio emission and the host galaxy major axis to investigate the distribution of the angle (beta) between the axes of the nuclear accretion disk and the host galaxy disk in Seyfert ...
Andrew S. Wilson, Antonucci R. R. J., Davies R. D., Edmunds M. G., Kukula M. J., Morris S., Mundell C. G., Neff S. G., Neil M. Nagar, Pedlar A., Pringle J. E., Sandqvist A., Sopp H. M., Takase B., Ulvestad J. S., Unger S. W., Winkler H.   +16 more
core   +4 more sources

Physical properties of dense molecular gas in centres of Seyfert galaxies [PDF]

, 2012
We present new ∼1 arcsec resolution data of the dense molecular gas in the central 50–100 pc of four nearby Seyfert galaxies. Plateau de Bure Interferometer (PdBI) observations of HCN and, in two of the four sources, simultaneously HCO + allow us to ...
E. Sani, E. Sani, R. Davies, A. Sternberg, J. Graciá-Carpio, E. Hicks, M. Krips, L. Tacconi, R. Genzel, B. Vollmer, E. Schinnerer, S. García-Burillo, A. Usero, G. O. D. Xivry   +13 more
semanticscholar   +1 more source

Stellar and dust properties in a sample of blue early type galaxies [PDF]

Serbian Astronomical Journal, 2022
This paper presents a comparative study of physical properties of a sample of 89 blue early-type galaxies (ETGs) from the local universe by fitting SEDs to their multi-wavelength photometric and spectroscopic data.
Deshmukh S.P., Vagshette N.D., Patil M.K.   +2 more
doaj   +1 more source