Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.295...95k&link_type=abstract
Astrophysics and Space Science, Volume 295, Issue 1-2, pp. 95-100
Astronomy and Astrophysics
Astrophysics
Active Galaxies, Galaxies: Kinematics And Dynamics, Quasars, Liners
Scientific paper
We present new interferometric observations of the molecular gas distribution and kinematics in the nuclei of different active galaxies at high angular resolution and high sensitivity carried out with the IRAM Plateau de Bure interferometer (PdBI). The observations cover galaxies in a redshift range of ˜0.03-1.4. We have so far observed five different active galaxies: NGC3718, NGC1068, HE1029-1831, 3C48 and Q0957+561. The first two objects belong to the NUGA (NUclei of GAlaxies) project - an international collaboration mainly between Spain, France and Germany - containing about 30 Seyfert and LINER galaxies. Both are at the same distance of ˜14Mpc and show a warped gas and dust disk. The new mosaic map of NGC3718 corrected for short-spacing effects with IRAM 30 m observations well demonstrates the existence of the warped gas disk with several secondary maxima in the projected gas distribution caused by orbit crowding effects. Based on these new data we have improved recent simulations of the warped disk in NGC3718. HE1029-1831 and 3C48 are nearby QSOs. HE1029-1831 is taken out of the Cologne nearby QSO sample. The maps of the integrated CO(1-0) and CO(2-1) emission clearly show that the molecular gas is mostly related to the central bulge with a non-negligible fraction distributed along the bar known from optical observations. Our new CO data of 3C48 unveil new information about the kinematics of its molecular gas complementing and improving further studies based on previous infrared observations and detailed multi-particle simulations. Finally, new measurements of the CO(1-0) line in Q0957+561 - a highly-red-shifted, gravitationally lensed quasar - will be presented as a link to earlier evolutionary stages of active galaxies and their hosts.
Bertram Thomas
Eckart Andreas
Krips Melanie
Neri Roberto.
Pott Joerg-Uwe
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