2013ApJ...768..107H


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.10CEST01:33:26

2013ApJ...768..107H - Astrophys. J., 768, 107 (2013/May-2)

Fueling active galactic nuclei. I. How the global characteristics of the central kiloparsec of seyferts differ from quiescent galaxies.

HICKS E.K.S., DAVIES R.I., MACIEJEWSKI W., EMSELLEM E., MALKAN M.A., DUMAS G., MULLER-SANCHEZ F. and RIVERS A.

Abstract (from CDS):

In a matched sample of Seyfert and quiescent galaxies we simultaneously probe the stellar and molecular gas kinematics from 1 kpc down to 50 pc with the aim of identifying the dynamical processes dictating black hole accretion rates. This first paper compares the global characteristics of a sample of 10 galaxies. We find several differences within a radius of 500 pc that are correlated with active galactic nucleus (AGN) activity. The Seyferts have (1) a more centrally concentrated nuclear stellar surface brightness with lower stellar luminosities beyond a radius of 100 pc, (2) a lower stellar velocity dispersion within a radius of 200 pc, (3) elevated H21-0 S(1) luminosity out to a radius of at least 250 pc, and (4) more centrally concentrated H2 surface brightness profiles. These observed differences can be interpreted as evidence for Seyfert galaxies having a dynamically cold (in comparison to the bulge) nuclear structure composed of a significant gas reservoir and a relatively young stellar population. This structure is undetected (and possibly does not exist) in quiescent galaxies. The presence of such a nuclear structure in Seyfert galaxies provides evidence for inflow of the surrounding interstellar medium since the nuclear stellar population requires a supply of gas from which to form. The fueling of a Seyfert AGN is thus associated with the formation of a dynamically cold component of gas and stars on scales of hundreds of parsecs.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: kinematics and dynamics - galaxies: nuclei - galaxies: Seyfert - infrared: galaxies

Simbad objects: 10

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Number of rows : 10

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 NGC 357 GiC 01 03 21.873 -06 20 21.30   12   11.62   ~ 63 0
2 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1408 1
3 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1536 2
4 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 743 1
5 NGC 4030 GiP 12 00 23.6122434029 -01 06 00.223672461   11.42   10.3 10.4 ~ 292 1
6 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 454 0
7 NGC 6300 Sy2 17 16 59.473 -62 49 13.98   10.88 13.08 9.44 10.2 ~ 361 0
8 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 722 0
9 IC 5267 GiP 22 57 13.572 -43 23 46.11   11.18 10.47 9.83 10.4 ~ 127 0
10 NGC 7743 Sy2 23 44 21.1586928811 +09 56 02.970129689   14.19 13.28     ~ 289 0

    Equat.    Gal    SGal    Ecl

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2020.08.10-01:33:26

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