J/ApJ/737/71 The [OIII] emission line in SDSS AGNs (Zhang+, 2011)
The blueshifting and Baldwin effects for the [O III] λ5007 emission line
in type 1 active galactic nuclei.
Zhang K., Dong X.-B., Wang T.-G., Gaskell C.M.
<Astrophys. J., 737, 71 (2011)>
=2011ApJ...737...71Z 2011ApJ...737...71Z
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; QSOs ; Line Profiles ;
Equivalent widths
Keywords: galaxies: active - galaxies: Seyfert - quasars: emission lines
Abstract:
We use homogeneous samples of radio-quiet Seyfert 1 galaxies and QSOs
selected from the Sloan Digital Sky Survey to investigate the
connection between the velocity shift and the equivalent width (EW) of
the [OIII]λ5007 emission line, and their correlations with
physical parameters of active galactic nuclei (AGNs). We find a
significant and negative correlation between the EW of the core
component, EW(core), and the blueshift of either the core (the peak),
the wing, or the total profile of [OIII] emission; it is fairly strong
for the blueshift of the total profile in particular. However, both
quantities (EW and velocity shift) generally have only weak, if any,
correlations with fundamental AGN parameters such as the nuclear
continuum luminosity at 5100Å (L5100), black hole mass (MBH),
and the Eddington ratio (L/LEdd); these correlations include the
classical Baldwin effect of EW(core), an inverse Baldwin effect of
EW(wing), and the relationship between velocity shifts and L/LEdd.
Our findings suggest that both the large object-to-object variation in
the strength of [OIII] emission and the blueshift-EW(core) connection
are not governed primarily by fundamental AGN parameters such as
L5100, MBH, and L/LEdd. We propose that the interstellar medium
conditions of the host galaxies play a major role instead in the
diversity of the [OIII] properties in active galaxies. This suggests
that the use of [OIII]λ5007 luminosity as a proxy of AGN
luminosity does not depend strongly on the above-mentioned fundamental
AGN parameters.
Description:
Type 1 AGNs are chosen from the sample of Seyfert 1 galaxies and
quasars of Dong et al. (2011ApJ...736...86D 2011ApJ...736...86D) taken from the Fourth
Data Release (Adelman-McCarthy et al. 2006, Cat. II/267, superseded by
Cat. II/294) of SDSS.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 105 383 Parameters of the core and wing components of
[OIII]λ5007 emission line: basic sample
table2.dat 63 1568 Equivalent width and flux of the core and wing
components of [OIII]λ5007 emission line:
extended sample
--------------------------------------------------------------------------------
See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/ApJ/708/427 : Type 2 AGNs with double-peaked [OIII] lines (Liu+, 2010)
J/ApJ/705/L76 : AGNs with double-peaked [OIII] lines (Wang+, 2009)
J/ApJ/702/767 : CIV and FeKα Baldwin effects in AGNs (Wu+, 2009)
J/AJ/130/381 : Blueshifted [O III] emission (Boroson+, 2005)
J/ApJ/549/155 : [OIII] emission in a sample of AGNs (Nagao+, 2001)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SDSS SDSS identification (JHHMMSS.ss+DDMMSS.s)
21- 30 F10.6 [mW/m2] logFc [-16.17/-13.19] Log flux of core component;
erg/s/cm2
32- 41 F10.6 0.1nm EWc [0.81/201.59] Equivalent width of core
component; Angstroms
43- 52 F10.6 [mW/m2] logFw [-15.63/-13.33] Log flux of wing component;
erg/s/cm2
54- 62 F9.5 0.1nm EWw [1.04/159.21] Equivalent width of wing
component; Angstroms
64- 76 F13.8 km/s DVc [-400/233] Velocity shift of core component (1)
78- 91 F14.8 km/s DVw [-1135/557] Velocity shift of wing component (1)
93-105 F13.8 km/s DV [-726/266] Velocity shift of centroid (1)
--------------------------------------------------------------------------------
Note (1): With respect to [SII] (6716, 6731 Angstroms) doublet lines.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- SDSS SDSS identification (JHHMMSS.ss+DDMMSS.s)
21- 30 F10.6 [mW/m2] logFc [-32.39/-13.54]?=-99.999999 Log flux of core
component; erg/s/cm2 (1)
32- 41 F10.6 0.1nm EWc [0.31/127.1]?=0 Equivalent width of core
component; Angstroms
43- 52 F10.6 [mW/m2] logFw [-16.10/-13.67]?=-99.999999 Log flux of wing
component; erg/s/cm2 (1)
54- 63 F10.6 0.1nm EWw [0.93/108.55]?=0 Equivalent width of wing
component; Angstroms
--------------------------------------------------------------------------------
Note (1): -99.999999 indicates an infinite value.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Jan-2013