2008A&A...485L...5M


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.26CEST06:40:45

2008A&A...485L...5M - Astronomy and Astrophysics, volume 485, L5-8 (2008/7-2)

A circumnuclear disk of atomic hydrogen in Centaurus A.

MORGANTI R., OOSTERLOO T., STRUVE C. and SARIPALLI L.

Abstract (from CDS):

We present new observations, performed with the Australia Telescope Compact Array, of the HI 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 HI 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 HI absorption is not, as was previously claimed, evidence of gas infall into the AGN, but instead is due to a cold, circumnuclear disk.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: ISM - galaxies: individual: Centaurus A

Status at CDS:  

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1773 3
2 PKS 1315-46 Rad 13 18 29.90 -46 20 34.0           ~ 16 1
3 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3974 3
4 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 944 1
5 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2097 2

    Equat.    Gal    SGal    Ecl

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2020.05.26-06:40:45

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