2016A&A...588A..46M


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET09:19:53

2016A&A...588A..46M - Astronomy and Astrophysics, volume 588A, 46-46 (2016/4-1)

The warm molecular hydrogen of PKS B1718-649.

MACCAGNI F.M., SANTORO F., MORGANTI R., OOSTERLOO T.A., OONK J.B.R. and EMONTS B.H.C.

Abstract (from CDS):

We present new SINFONI VLT observations of molecular hydrogen (H2) in the central regions (<2.5kpc) of the youngest and closest radio source PKS B1718-649. We study the distribution of the H2 traced by the 1-0 S(1) ro-vibrational line, revealing a double disk structure with the kinematics of both disks characterised by rotation. An outer disk (r>650pc) is aligned with other components of the galaxy (atomic hydrogen, stars, dust), while the inner disk (r<600pc) is perpendicular to it and is polar with respect to the stellar distribution. However, in the innermost 75pc, the data show the presence of H2 gas redshifted with respect to the rotating inner disk (δv~+150km/s), which may trace gas falling into the super massive black hole associated with the central radio source. Along the same line of sight, earlier observations had shown the presence in the central regions of PKS B1718-649 of clouds of atomic hydrogen with similar unsettled kinematics. The range of velocities and mass of these unsettled clouds of H i and H2 suggest they may be actively contributing to fuelling the central newly born radio source.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: individual: PKS B1718-649 - galaxies: active - infrared: ISM - galaxies: kinematics and dynamics - ISM: clouds - HII regions

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4075 3
2 NGC 6328 QSO 17 23 41.02938963 -65 00 36.6113150   13.17 13.2 11.45 12.2 ~ 212 1

    Equat.    Gal    SGal    Ecl

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2021.03.01-09:19:53

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