J/A+A/631/A46 SDSS DR10 radio-loud quasars sample (Gaur+, 2019)
Properties of radio-loud quasars in Sloan Digital Sky Survey.
Gaur H., Gu M., Ramya S., Guo H.
<Astron. Astrophys. 631, A46 (2019)>
=2019A&A...631A..46G 2019A&A...631A..46G (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Spectroscopy
Keywords: Galaxy: general - galaxies: active - galaxies: jets -
quasars: emission lines
Abstract:
We present a study of a sample of 223 radio loud quasars (up to
redshift <0.3) in order to investigate their spectral properties.
Twenty-six of these radio loud quasars are identified as Flat Spect
rum Radio Quasars (FSRQs) and fifty-four are identified as Steep
Spectrum Radio Quasars (SSRQs) based on their radio spectral index. We
study the [OIII] line properties of these quasars to investigate the
origin and properties of blue wings (shift of the profile towards
lower wavelengths) and blue outliers (shift of the whole spectroscopic
feature). Most of the quasars show blue wings with velocities up to
420km/s. We find that around 17% of the quasars show outliers with
velocities spanning 4 19 to -315km/s. Finally, we revisit the
MBH-σ relation of our sample using [SII]λ6716, 6731 and
[OIII] linewidths as surrogates for stellar velocity dispersions,
σ, to investigate their location on the MBH-σ relation
for quiescent galaxies. Due to strong blending of [SII] with
Hα, we could estimate σ[SII] of only 123 quasars. We
find that the radio-loud quasars do not show a relationship between
MBH and σ[SII]/[OIII] up to a redshift of 0.3, although they
cluster around the local relation. We find an overall offset of
0.12±0.05dex of our sample of radio loud quasars from the
MBH-σ relation of quiescent galaxies. Quasars in our highest
redshift bin (z=0.25-0.3) show a deviation of ∼0.33±0.06dex with
respect to the local relation. Implications of the results are
discussed.
Description:
We selected our sample of radio-loud quasars from the Sloan
Digital Sky Survey (SDSS) Data Release (DR10) quasar catalog.
We studied a sample of 223 radio-loud quasars out to z<0.3. We
investigated their black hole mass, radio luminosity, and Eddington
ratio distributions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 99 223 Estimates of optical measurements for the
radio-loud sample
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See also:
http://skyserver.sdss.org/DR10 : SDSS DR10 HomePage
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.2 deg RAdeg Right ascension (J2000)
8- 13 F6.2 deg DEdeg Declination (J2000)
15- 19 F5.3 --- z Redshift
21- 28 F8.2 km/s FWHMHa Hα FWHM
30- 36 F7.2 km/s e_FWHMHa rms uncertainty on Hα FWHM
38- 42 F5.2 [10-7W] logLHa log of Hα luminosity
44- 48 F5.3 [10-7W] e_logLHa rms uncertainty on Hα luminosity
50- 53 F4.2 [Msun] logMBH log of black hole mass
55- 60 F6.2 km/s sigma[SII] ? Velocity dispersion of [SII] line
62- 67 F6.2 km/s e_sigma[SII] ? rms uncertainty on velocity dispersion
of [SII] line
69- 74 F6.2 km/s sigma[OIII] Velocity dispersion of [OIII] line
76- 81 F6.2 km/s e_sigma[OIII] rms uncertainty on velocity dispersion
of [OIII] line
83- 87 F5.2 [10-7W] logL[OIII] log of [OIII] luminosity
89- 93 F5.3 [10-7W] e_logL[OIII] rms uncertainty on [OIII] luminosity
95- 99 F5.2 [10-7W] lognuL1.4 log of 1.4GHz luminosity
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Acknowledgements:
Haritma Gaut, harry.gaur31(at)gmail.com
(End) Patricia Vannier [CDS] 19-Sep-2019