Abstract. High resolution MERLIN 5 GHz observations (0 ′′ . 04) of 7 Seyfert galaxies, selected as the ones previously showing evidence of collimated ejection, have been compared with high resolution archive HST data. The radio maps reveal rich structures in all the galaxies. NGC 2639 and TXFS 2226-184 have multiple knot parsec-scale extended structures, Mrk 1034, Mrk 1210, NGC 4922C and NGC 55...

We analyze the 0.5−10 keV spectra of six Seyfert 2 galaxies observed with the X-ray satellite ASCA: Mrk 3, Mrk 348, Mrk 1210, Mrk 477, NGC 7212, and Was 49b. These galaxies were selected based on their possession of optical polarized broad lines. In the 2−10 keV band, their spectra are heavily absorbed, with 2−10 keV absorption-corrected X-ray luminosities ranging from 10 to 10 ergs s−1. The ob...

High resolution, 1.1, 1.6, and 2.2 μm imaging of the luminous infrared galaxy NGC 6090 obtained with NICMOS of the Hubble Space Telescope are presented. These new observations are centered on the two nuclei of the merger, and reveal the spiral structure of the eastern galaxy and the amorphous nature of the western galaxy. The nuclear separation of 3.2 kpc (H0 = 75 kms −1 Mpc) indicates that NGC...

Collimated outflows (ranging from barely collimated winds to actual jets) are present in a wide range of astrophysical objects, four types of them being represented at this conference, namely young stellar objects, planetary nebulae, radio galaxies and Seyfert galaxies. In this paper, I first try to give a brief overview of the basic properties of the outflows and their environments, as they ar...

A critical study of the properties of groups of galaxies can be done only once a complete census of group members is available. Despite extensive surveys, even nearby groups can lead to surprises. Indeed we report the discovery of a previously unnoticed member of the Centaurus A Group, NGC 5011C.While the galaxy is a well known stellar system listed with a NGC number its true identity remained ...

We just started an observational program to obtain 2D kinematics of nuclear bars, to be compared to N body simulations of single and double-barred galaxies. We have started a program to study the kinematics of double-barred galaxies using the Integral Field Spectrograph OASIS (CFHT). Stellar bidimensional velocity fields obtained with OASIS are compared with N body + SPH simulations, to constra...

We present NICMOS imaging of broad band and molecular hydrogen emission in Seyfert galaxies. In 6/10 Seyferts we detect resolved or extended emission in the 1-0 S(1)λ2.121μm or 1-0 S(3)λ1.9570μm molecular hydrogen lines. We did not detect emission in the most distant galaxy or in the 2 Seyfert 1 galaxies in our sample because of the luminosity of the nuclear point sources. In NGC 5643, NGC 2110...

As part of an ongoing program to test Newton’s law of gravity in the low acceleration regime using globular clusters, we present here new results obtained for NGC 6171. Combining VLT spectra for 107 stars with data from the literature, we were able to trace the velocity dispersion profile up to ∼ 16 pc from the cluster center, probing accelerations of gravity down to 3.5× 10−9 cm s−2. The veloc...

We present the results of a K-band imaging survey of 40 arcmin in fields around 14 radio-loud AGN (6 radio galaxies and 8 quasars) with z > 1.5. The survey, 80% complete to K < 19.2 and complemented by R-band imaging, aimed at investigating whether extremely red objects (EROs) are present in excess around high-z AGN, and to study the environment of z > 1.5 radio galaxies and radio-loud quasars....

Studies of high-redshift galaxies usually interpret offsets from the Tully-Fisher (TF) relation as luminosity evolution. However, apparent luminosity offsets may actually reflect anomalous velocity widths. Rotation curve anomalies such as strong asymmetries or radial truncation are probably common in high-z samples, due to frequent galaxy interactions and in some cases low S/N data, although lo...