J/ApJ/919/62 AGNs with sp. from SDSS & radio obs. from WENSS (Runnoe+, 2021)
Orientation and accretion in a representative sample of active galactic nuclei.
Runnoe J.C.,Boroson T.
<Astrophys. J., 919, 62 (2021)>
=2021ApJ...919...62R 2021ApJ...919...62R
ADC_Keywords: Active gal. nuclei; Spectra, optical; Radio sources; Redshifts;
Surveys
Keywords: Quasars ; Radio loud quasars ; Radio active galactic nuclei ;
Surveys
Abstract:
We highlight a representative sample of active galactic nuclei
selected independent of orientation. The defining characteristic of
the selection is sophisticated matching between the 0.1<z<0.6 Sloan
Digital Sky Survey quasars from the Seventh Data Release to the
Westerbork Northern Sky Survey at 325MHz and the subsequent
application of a spatially integrated radio spectral luminosity
density cut. The resulting sample is complete down to the limiting
luminosity and unbiased by orientation. Compared to orientation
samples in the literature this approach yields less bias with
redshift, relatively more lobe-dominated sources including those with
radio lobes and no visible core, and a distribution of radio core
dominance that is consistent with expectations from a uniform
distribution of inclinations with solid angle. We measure properties
of the optical spectra, and use the sample to investigate the
orientation dependence of the velocity width of the broad Hβ
emission line. We recover the known orientation dependence, but the
sharp envelope of previous studies where only edge-on sources display
the broadest lines, is absent. Scatter in this diagram is not
attributable solely to black hole mass, Eddington ratio, or
contamination in the sample from compact steep-spectrum sources. A
physical framework for quasar beaming and a disk-like broad-line
region can describe the representative sample when it is expanded to
include additional parameters, in particular jet properties and the
broad-line region velocity field. These points serve to illustrate the
critical role of sample selection in the interpretation of observable
properties as indicators of physical parameters of quasar central
engines.
Description:
We selected objects from the seventh data release (DR7) quasar catalog
(Schneider+ 2010, VII/260 ; superseded by VII/289) of SDSS. We first
applied a redshift cut of 0.1<z<0.6 to ensure complete spectral
coverage of the Hβ region for all sources.
We used a sophisticated procedure to match members of the SDSS DR7
quasar catalog to the Westerbork Northern Sky Survey (WENSS;
Rengelink+ 1997, J/A+AS/124/259), a 325MHz survey where anisotropic
beaming effects are minimized, and applied a total radio luminosity
cut of log(L325)<33.0erg/s/Hz.
The result is a sample of 125 AGN with optical spectra and radio
observations.
In order to put this new sample in context, we compare it to a variety
of orientation samples from the literature. See Section 3.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 131 125 Sample and radio properties
table2.dat 56 125 Spectral properties
table3.dat 70 80 WB86 (Wills & Browne 1986ApJ...302...56W 1986ApJ...302...56W)
sample properties (section 3.1)
table4.dat 60 52 SED sample (Shang+ 2011ApJS..196....2S 2011ApJS..196....2S) properties
(section 3.2)
table5.dat 70 386 B15 (Brotherton+ 2015, J/MNRAS/454/3864) sample
properties (section 3.3)
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See also:
VIII/2 : Molonglo Reference Catalog of Radio Sources (Large+ 1981)
VIII/42 : Texas Survey of radio sources at 365MHz (Douglas+ 1996)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/MNRAS/204/151 : Bright radio sources at 178 MHz (3CRR) (Laing+ 1983)
J/A+AS/124/259 : Westerbork Northern Sky Survey I. (Rengelink+ 1997)
J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)
J/AJ/131/666 : Double-lobed radio quasars from the SDSS (de Vries+, 2006)
J/A+A/520/A62 : Radio-optical scrutiny of compact AGN (Arshakian+, 2010)
J/AJ/141/182 : Radio and optical properties of QSOs (Kimball+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/MNRAS/454/3864 : Orientation & QSO BH mass estimation (Brotherton+ 2015)
J/ApJS/221/7 : SDSS QSOs at z<0.8. II. New sp. obs. (Runnoe+, 2015)
J/ApJS/238/9 : Giant radio sources known to date (Kuzmicz+, 2018)
J/ApJ/904/179 : VLA observations of 147 radio-loud Quasars (Maithil+, 2020)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS DR7 name (HHMMSS.ss+DDMMSS.s;
J2000)
20- 25 F6.4 --- zspec [0.15/0.6] SDSS DR7 spectroscopic
redshift
27- 31 F5.2 [10-7W] logLL5100 [41.27/46.3]? Logarithm of the
monochromatic luminosity
at 5100Å in erg/s
33- 36 F4.2 [10-7W] e_logLL5100 [0.05/0.12]? Mean error on logLL5100
38 A1 --- l_FIRSTcore Limit flag on FIRSTcore
40- 46 F7.2 mJy FIRSTcore [0.17/6051] FIRST core spectral flux
density at 1.4GHz
48- 53 F6.2 mJy e_FIRSTcore [0.14/303] Mean error on FIRSTcore
55 A1 --- n_FIRSTcore Note on FIRSTcore, see Note (1)
57- 63 F7.2 mJy FIRSTtot [16.44/6073] FIRST spatially integrated
spectral flux density at 1.4GHz
65- 70 F6.2 arcsec FIRSTsize [0.28/318]? Angular size from FIRST at
1.4GHz
72- 77 F6.1 mJy NVSStot [27/8102] NVSS spatially integrated
spectral flux density at 1.4GHz
79- 83 I5 mJy WENSStot [82/30410] WENSS spatially integrated
spectral flux density at 325MHz
85- 88 I4 mJy e_WENSStot [6/1216] Mean error on WENSStot
90 A1 --- l_logLc Limit flag on logLc
92- 96 F5.2 [10-7W/Hz] logLc [30/34.8] Logarithm of the core
luminosity νLν at 5GHz
k-corrected from FIRST in erg/s/Hz
98- 101 F4.2 [10-7W/Hz] e_logLc [0.02/0.4] Mean error on logLc
103- 107 F5.2 [10-7W/Hz] logL325 [33/35.2] Logarithm of the luminosity
nu L_nu at 325MHz in erg/s/Hz
109- 112 F4.2 [10-7W/Hz] e_logL325 [0.02/0.04] Mean error on logL325
114 A1 --- l_logRv Limit flag on logRv
116- 119 F4.2 --- logRv [0.25/4.5]? Radio core dominance
121- 124 F4.2 --- e_logRv [0.06/0.5]? Mean error on logRv
126- 131 F6.3 --- alphar [-1.1/0.2] Radio spectral index between
325MHz and 1.4GHz
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Note (1): FIRST core component is estimated. See Section 2.2.
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS DR7 name (HHMMSS.ss+DDMMSS.s; J2000)
20- 24 I5 km/s HbFWHM [1587/29140]? Broad H-beta full-width
at half-maximum
26- 29 I4 km/s e_HbFWHM [75/3804]? Mean error on HbFWHM
31- 37 F7.1 0.1nm HbEW [-241/16389]? Broad H-beta equivalent width (2)
39- 44 F6.1 0.1nm e_HbEW [-74.3/3091]? Mean error on HbEW
46- 52 F7.1 0.1nm FeIIEW [0/11825]? Broad optical FeII equivalent
width (2)
54- 56 F3.1 0.1nm e_FeIIEW [2.8/4.6]? Mean error on FeIIEW
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Note (2): Equivalent widths are given in the rest frame.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- QSO QSO name (HHMM+DDd; B1950)
10- 11 I2 h RAh Hour of Right Ascension (J2000)
13- 14 I2 min RAm Minute of Right Ascension (J2000)
16- 19 F4.1 s RAs Second of Right Ascension (J2000)
21- 21 A1 --- DE- Sign of the Declination (J2000)
22- 23 I2 deg DEd Degree of Declination (J2000)
25- 26 I2 arcmin DEm Arcminute of Declination (J2000)
28- 31 F4.1 arcsec DEs Arcsecond of Declination (J2000)
33- 38 F6.4 --- zspec [0.03/0.96] Spectroscopic redshift
40- 44 I5 km/s HbFWHM [1800/13500] Broad H-beta full width
at half maximum
46- 51 F6.3 [10-7W] logL325 [30.6/36.1]? Logarithm of the luminosity
νLν at 325MHz in erg/s
53- 57 F5.3 [10-7W] e_logL325 [0.001/0.2]? Mean error on logL325
59- 63 A5 --- n_logL325 Note on logL325 (1)
65- 65 A1 --- l_logRv Limit flag on radio core dominance
67- 70 F4.2 --- logRv [0.6/4.2]? Radio core dominance
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Note (1): Note on logL325 as follows:
TEXAS = Douglas et al. (1996AJ....111.1945D 1996AJ....111.1945D ; VIII/42);
VLBI = Arshakian et al. (2010, J/A+A/520/A62);
WENSS = Rengelink et al. (1997, J/A+AS/124/259);
MOL = Large et al. (1981MNRAS.194..693L 1981MNRAS.194..693L ; VIII/2).
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Name Source name
9- 10 I2 h RAh Hour of Right Ascension (J2000)
12- 13 I2 min RAm Minute of Right Ascension (J2000)
15- 18 F4.1 s RAs Second of Right Ascension (J2000)
20- 20 A1 --- DE- Sign of the Declination (J2000)
21- 22 I2 deg DEd Degree of Declination (J2000)
24- 25 I2 arcmin DEm Arcminute of Declination (J2000)
27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000)
32- 37 F6.4 --- zspec [0.15/1.41] Spectroscopic redshift
39- 43 I5 km/s HbFWHM [3095/20925]? Broad H-beta full width
at half maximum
45- 49 F5.2 [10-7W] logL325 [33.17/36.5] Logarithm of the luminosity
νLν at 325MHz in erg/s
51- 54 F4.2 [10-7W] e_logL325 [0.01/0.04] Mean error on logL325
56- 60 F5.2 --- logRv [-0.04/4.32] Radio core dominance
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- SDSS SDSS name (HHMMSS.ss+DDMMSS.s; J2000)
20- 21 I2 h RAh Hour of Right Ascension (J2000)
23- 24 I2 min RAm Minute of Right Ascension (J2000)
26- 29 F4.1 s RAs Second of Right Ascension (J2000)
31- 31 A1 --- DE- Sign of the Declination (J2000)
32- 33 I2 deg DEd Degree of Declination (J2000)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000)
38- 41 F4.1 arcsec DEs Arcsecond of Declination (J2000)
43- 48 F6.4 --- zspec [0.08/0.75] Spectroscopic redshift
50- 54 I5 km/s HbFWHM [1376/28298] Broad H-beta full width
at half maximum
56- 60 F5.2 [10-7W] logL325 [31/35.6]? Logarithm of the luminosity
νLν at 325MHz in erg/s
62- 65 F4.2 [10-7W] e_logL325 [0.02/0.21]? Mean error on logL325
67- 70 F4.2 --- logRv [0.65/4.29] Radio core dominance
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Jan-2023