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http://hdl.handle.net/2289/3626
Title: | A circumnuclear disk of atomic hydrogen in Centaurus A |
Authors: | Morganti, R. Oosterloo, T.A. Struve, C. Saripalli, Lakshmi |
Keywords: | galaxies: active galaxies: ISM galaxies: individual: Centaurus A |
Issue Date: | Jun-2008 |
Publisher: | EDP Sciences for ESO |
Citation: | Astronomy and Astrophysics, 2008, Vol.485, pL5 |
Abstract: | We present new observations, performed with the Australia Telescope Compact Array, of the H I absorption in the central regions of Centaurus A. For the first time, absorption is detected against the radio core at velocities blueshifted with respect to the systemic velocity. Moreover, the data show that the nuclear redshifted absorption component is broader than reported before. With these new results, the kinematics of the H I in the inner regions of Cen A appears very similar to that observed in emission for the molecular circumnuclear disk. This suggests that the central H I absorption is not, as was previously claimed, evidence of gas infall into the AGN, but instead is due to a cold, circumnuclear disk. |
Description: | Open Access |
URI: | http://hdl.handle.net/2289/3626 |
ISSN: | E-ISSN: 1432-0746 P-ISSN: 0004-6361 |
Alternative Location: | http://adsabs.harvard.edu/abs/2008A&A...485L...5M http://arxiv.org/abs/0805.1627 http://dx.doi.org/10.1051/0004-6361:200809974 |
Copyright: | 2008 ESO |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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2008 A&A V485 L5.pdf | Open Access | 269.99 kB | Adobe PDF | View/Open |
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