J/ApJ/922/202 Radio luminous QSOs in SDSS DR14Q (Rusinek-Abarca+, 2021)
The dependence of the fraction of radio luminous quasars on redshift and its
theoretical implications.
Rusinek-Abarca K., Sikora M.
<Astrophys. J., 922, 202 (2021)>
=2021ApJ...922..202R 2021ApJ...922..202R
ADC_Keywords: QSOs; Active gal. nuclei; Radio sources; Redshifts; Optical;
Black holes; Morphology
Keywords: Radio active galactic nuclei ; Quasars ; Radio jets ;
Non-thermal radiation sources
Abstract:
While radio emission in quasars can be contributed to by a variety of
processes (involving star-forming regions, accretion disk coronas and
winds, and jets), the powering of the radio loudest quasars must
involve very strong jets, presumably launched by the Blandford-Znajek
mechanism incorporating the magnetically arrested disk (MAD) scenario.
We focus on the latter and investigate the dependence of their
fraction on redshift. We also examine the dependence of the radio-loud
fraction (RLF) on BH mass (MBH) and Eddington ratio (λEdd),
while excluding the redshift bias by narrowing its range. In both of
these investigations, we remove the bias associated with: (1) the
diversity of source selection by constructing two well-defined,
homogeneous samples of quasars (first within 0.7≤z≤1.9, second
within 0.5≤zw=0.7); and (2) a strong drop in the RLF of quasars at
smaller BH masses by choosing those with BH masses larger than
108.5M☉. We confirm some of the previous results showing the
increase in the fraction of radio-loud quasars with cosmic time and
that this trend can be even steeper if we account for the bias
introduced by the dependence of the RLF on BH mass, whereas the bias
introduced by the dependence of the RLF on Eddington ratio is shown to
be negligible. Assuming that quasar activities are triggered by galaxy
mergers, we argue that such an increase can result from the slower
drop with cosmic time of mixed mergers than of wet mergers.
Description:
With a focus on performing a study of the radio-loud fraction of
quasars on redshift, we decide to use sources from
Gurkan+ (2019, J/A+A/622/A11), who collected 49925 optically selected
quasars for detailed radio analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 64 3511 Sample of 0.5-0.7 QSOs (total of 3511 objects) used
in this study
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)
VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
J/AJ/131/666 : Double-lobed radio quasars from the SDSS (de Vries+, 2006)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/ApJ/658/815 : Radio loudness of active galactic nuclei (Sikora+, 2007)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/A+A/544/A25 : GPS radio sources multifrequency study (Mingaliev+, 2012)
J/ApJ/765/62 : SDSS-DR7 opt. sp. analysis of radio galaxies (Sikora+, 2013)
J/ApJ/769/79 : Spitzer obs. of radio-loud AGNs (CARLA) (Wylezalek+, 2013)
J/MNRAS/462/1910 : H-ATLAS NGP LOFAR radio catalogue (Hardcastle+, 2016)
J/ApJS/228/9 : Physical param. of ∼300000 SDSS-DR12 QSOs (Kozlowski, 2017)
J/ApJS/233/17 : Swift/BAT AGN spectroscopic survey. V. X-ray (Ricci+, 2017)
J/A+A/598/A104 : LOFAR Two-metre Sky Survey (Shimwell+, 2017)
J/MNRAS/477/830 : Radio flux density of extremely red quasars (Hwang+, 2018)
J/A+A/622/A11 : LoTSS/HETDEX. Optical quasars. I. (Guerkan+, 2019)
J/ApJ/870/31 : BAT AGN spectroscopic survey. XI. IR phot. (Ichikawa+, 2019)
J/A+A/622/A15 : Broad absorption line quasars in LDR1 (Morabito+, 2019)
J/other/AstBu/74.348 : 164 GHz-peaked spectrum sources (Sotnikova+, 2019)
J/ApJ/900/125 : Radio properties of Swift/BAT AGNs (Rusinek+, 2020)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS identifier (HHMMSS.ss+DDMMSS.s; J2000)
20- 25 F6.4 --- z [0.5/0.7] Spectroscopic redshift
27- 31 F5.2 [Msun] logMBH [8.5/10.3] log Black Hole mass
33- 37 F5.2 [10-7W] logLb [44/47.1] log bolometric luminosity; erg/s
39- 43 F5.2 [-] logEdd [-3.3/-0.07] log Eddington ratio
45- 50 F6.1 mJy F1.4 [0.6/6626] The 1.4GHz flux density
52- 59 F8.2 --- Ratio [0.49/56027] The 1.4GHz/i band luminosity ratio
61- 62 A2 --- Class Radio class (1)
64 A1 --- Morph Radio morphology (2)
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Note (1): Radio class as follows:
RL = radio-loud (235 occurrences);
RI = radio-intermediate (695 occurrences);
RQ = radio-quiet (2581 occurrences).
Note (2): Radio morphology as follows:
L = lobed (136 occurrences);
E = extended (but not lobed; 35 occurrences);
C = compact (375 occurrences);
U = undetected (2965 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Mar-2023