2008A&A...485L..21H


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.07CEST19:59:10

2008A&A...485L..21H - Astronomy and Astrophysics, volume 485, L21-24 (2008/7-2)

Discovery of a strong Baldwin effect in mid-infrared AGN lines.

HOENIG S.F., SMETTE A., BECKERT T., HORST H., DUSCHL W., GANDHI P., KISHIMOTO M. and WEIGELT G.

Abstract (from CDS):

We present the discovery of a Baldwin effect in 8 nearby Seyfert galaxies for the three most prominent mid-infrared forbidden emission lines observable from the ground that are commonly found in AGN, [ArIII](λ8.99µm), [SIV](λ10.51µm), and [NeII](λ12.81µm). The observations were carried out using the VLT/VISIR imager and spectrograph at the ESO/Paranal observatory. The bulk of the observed line emission originates in the innermost region within a diameter of 0.4", which corresponds to spatial scales of less than 100pc within the targeted galaxies. The correlation index is approximately -0.6 and does not vary significantly for all lines studied. To date, this is the strongest anticorrelation that has been measured between line equivalent width and continuum luminosity. In the case of Circinus, we show that, despite using mid-infrared lines, obscuration by either the host galaxy or the circumnuclear dust torus might affect the measurement. Given the small observed spatial scales from which most of the line emission emanates, it is unclear how well these observations agree with the favored ``disappearing NLR'' scenario for the narrow-line Baldwin effect.

Abstract Copyright:

Journal keyword(s): galaxies: Seyfert - galaxies: active - infrared: galaxies - galaxies quasars: emission lines - X-rays: galaxies

Status at CDS:  

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 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2898 2
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4048 2
3 ESO 428-14 Sy2 07 16 31.2067043371 -29 19 28.898984517   13.28 13.52 11.61   ~ 210 4
4 ESO 434-40 Sy2 09 47 40.1345889569 -30 56 55.959492708   14.10 13.69 12.44   ~ 481 0
5 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1516 2
6 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1471 0
7 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 433 0
8 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 937 0
9 MCG-03-34-064 Sy2 13 22 24.485 -16 43 42.09   14   13.16   ~ 259 2
10 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 994 2

    Equat.    Gal    SGal    Ecl

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2020.04.07-19:59:10

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