J/AJ/143/83 Properties of a sample of Seyfert 1 galaxies (Xu+, 2012)
Correlation analysis of a large sample of narrow-line Seyfert 1 galaxies:
linking central engine and host properties.
Xu D., Komossa S., Zhou H., Lu H., Li C., Grupe D., Wang J., Yuan W.
<Astron. J., 143, 83 (2012)>
=2012AJ....143...83X 2012AJ....143...83X
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; Redshifts ;
Line Profiles
Keywords: galaxies: active - galaxies: ISM - galaxies: Seyfert -
quasars: emission lines
Abstract:
We present a statistical study of a large, homogeneously analyzed
sample of narrow-line Seyfert 1 (NLS1) galaxies, accompanied by a
comparison sample of broad-line Seyfert 1 (BLS1) galaxies. Optical
emission-line and continuum properties are subjected to correlation
analyses, in order to identify the main drivers of the correlation
space of active galactic nuclei (AGNs), and of NLS1 galaxies in
particular. For the first time, we have established the density of the
narrow-line region as a key parameter in Eigenvector 1 space, as
important as the Eddington ratio L/LEdd. This is important because it
links the properties of the central engine with the properties of the
host galaxy, i.e., the interstellar medium (ISM). We also confirm
previously found correlations involving the line width of Hβ and the
strength of the Fe II and [O III]λ5007 emission lines, and we
confirm the important role played by L/LEdd in driving the properties
of NLS1 galaxies. A spatial correlation analysis shows that
large-scale environments of the BLS1 and NLS1 galaxies of our sample
are similar. If mergers are rare in our sample, accretion-driven
winds, on the one hand, or bar-driven inflows, on the other hand, may
account for the strong dependence of Eigenvector 1 on ISM density.
Description:
Our sample consists of Narrow-line Seyfert 1 (NLS1) galaxies from the
catalog of Veron-Cetty & Veron (2003, Cat. VII/235, superseded by
Cat. VII/258), to which we added a comparison sample of broad-line
Seyfert 1 (BLS1) galaxies from Boroson (2003, Cat. J/ApJ/585/647) at
z<0.3 first presented by Xu et al. (Paper I; 2007ApJ...670...60X 2007ApJ...670...60X). All
galaxies have been observed in the course of the Sloan Digital Sky
Survey (SDSS-DR3, 2005, Cat. II/259, superseded by Cat. V/139) and
have detectable low-ionization emission lines.
Results from our emission-line and continuum measurements are listed
in Table 1. After re-classification based on spectral emission-line
fitting, we have 39 broad-line Seyfert 1 (BLS1) and 55 narrow-line
Seyfert 1 (NLS1) galaxies in our sample. Relevant parameters of the
continua and emission lines were used to derive some active galactic
nuclei (AGN) parameters, including black hole masses and Eddington
ratios (Table 1).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 94 Key properties of the narrow-line Seyfert 1
(NLS1) and broad-line Seyfert 1 (BLS1) galaxies
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See also:
VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
J/ApJ/737/71 : The [OIII] emission line in SDSS AGNs (Zhang+, 2011)
J/AJ/132/321 : Morphology of narrow-line Seyfert 1 galaxies (Deo+, 2006)
J/ApJ/614/91 : Black hole mass and accretion rate of AGNs (Wu+, 2004)
J/ApJ/585/647 : Velocity dispersion in AGN (Boroson, 2003)
J/AJ/124/3042 : Narrow-line Seyfert 1 galaxies from SDSS EDR (Williams+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Hour of Right Ascension (J2000)
3- 4 I2 min RAm Minute of Right Ascension (J2000)
5- 9 F5.2 s RAs Second of Right Ascension (J2000)
10 A1 --- DE- Sign of the Declination
11- 12 I2 deg DEd Degree of Declination (J2000)
13- 14 I2 arcmin DEm Arcminute of Declination (J2000)
15- 18 F4.1 arcsec DEs Arcsecond of Declination (J2000)
20- 35 A16 --- Name Galaxy common name
37- 41 F5.3 --- z [0.034/0.289] Redshift
43- 47 F5.1 mag iMag [-24/-19] SDSS absolute i magnitude (1)
49- 52 I4 km/s W(Hb) Full-Width at Half-Maximum (FWHM) of the
broad component of Hβ (2)
54- 56 F3.1 --- I5007 [0.2/1.8] Ratio of total [O III] over
total Hβ emission (3)
58- 61 F4.2 --- I4570 [0/2.7] Ratio of Fe II 4570 over total
Hβ emission (3)
63- 65 I3 km/s W(SII) [110/570] FWHM of [S II]
67- 69 I3 km/s W(OIII) [110/780] FWHM of the core of [O III]
71- 73 I3 km/s VcOIII [-60/430] Velocity (blue) shift of the core
of [O III] with respect to [S II] (4)
75- 78 F4.2 --- RSII [0.87/1.47] Intensity ratio of
[S II]λ6716/λ6731
80 A1 --- l_Ne [<] Limit flag on Ne
81- 84 I4 cm-3 Ne [10/1030]? Narrow-line region (NLR)
electron density (5)
86- 90 F5.1 10-19W/m2/nm F510 [6.4/251.3] Flux density at 5100Å rest
frame, in 10-17erg/s/cm2/Å (6)
92- 95 F4.1 [uW/nm] logL510 Log of the monochromatic luminosity at
5100Å, derived from the SDSS photometry
(assumed erg/s/Å)
97-101 F5.2 [-] logER Log of the Eddington ratio L/LEdd (8)
103-105 F3.1 [-] logMbh Log of the black hole mass (9)
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Note (1): Derived from the point-spread function (PSF) i magnitude.
Note (2): The standard classification criterion of NLS1 (narrow-line Seyfert 1
galaxies) is according to the full-width at half-maximum (FWHM) of
the broad component of Hβ<2000km/s
(Goodrich, 1989ApJ...340..190G 1989ApJ...340..190G).
Note (3): Total Hβ emission refers to the sum of broad and narrow
components.
Note (4): We use positive velocity values to refer to blueshifts, negative one
for redshifts.
Note (5): Estimated from the density-sensitive [S II] intensity ratio
(see Paper I, 2007ApJ...670...60X 2007ApJ...670...60X, Section 5.1 for details).
Note (6): The point-spread function (PSF) g and r magnitudes (Galactic
extinction corrected) were used to determine the flux density at
5100{angstrom} rest frame.
Note (8): Eddington ratios were calculated from the deduced black hole masses
(see Section 3 for more details).
Note (9): We estimated the black hole masses of our NLS1 and BLS1 galaxies
using the RBLR-λL5100 relation given by Kaspi et al.
(2005ApJ...629...61K 2005ApJ...629...61K). The FWHM of the broad component from the
multi-Gaussian fit of Hβ, FWHM1 (Table 1), was used for
the black hole mass estimates.
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History:
From electronic version of the journal
References:
Xu et al. Paper I. 2007ApJ...670...60X 2007ApJ...670...60X
Komossa & Xu Paper II. 2007ApJ...667L..33K 2007ApJ...667L..33K
Komossa et al. Paper III. 2008ApJ...680..926K 2008ApJ...680..926K
(End) Sylvain Guehenneux [CDS] 21-May-2013