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Please use this identifier to cite or link to this item: 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)

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