J/MNRAS/515/1358 Radio-loud quasars luminosity distances (Huang+, 2022)
A cosmological distance measure using radio-loud quasars.
Huang L., Chang Z.X.
<Mon. Not. R. Astron. Soc. 515, 1358-1364 (2022)>
=2022MNRAS.515.1358H 2022MNRAS.515.1358H (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Radio sources ; Stars, distances
Keywords: galaxies: high-redshift - quasars: general - cosmology: observations -
dark energy - distance scale
Abstract:
We use the X-ray luminosity relation of radio-loud quasars (RLQs) to
measure these luminosity distances as well as estimate cosmological
parameters. We adopt four parametric models of X-ray luminosity to
test luminosity correlation for RLQs and radio-intermediate quasars
(RIQs) and give these cosmological distances. By Bayesian information
criterion (BIC), the data suggest that the luminosity relation
LX∝LUVgamma-uvLRadiogamma-radio for RLQs has better
goodness of fit, relative to other models, which can be interpreted as
this relation being preferred for RLQs. Meanwhile, we compare the
results from flat-spectrum radio-loud quasars (FSRLQs) and
steep-spectrum radio-loud quasars (SSRLQs), which indicate that their
luminosity correlations are not exactly the same. We also consider
dividing the RLQs sample into various redshift bins, which can be used
to check if the X-ray luminosity relation depends on the redshift.
Finally, we apply a combination of RLQs and SNla Pantheon to verify
the nature of dark energy concerning.
Description:
The properties of the 571 radio-loud quasars, including radio,
UV/optical and X-ray flux, which can be used to check X-ray luminosity
relation and measure these cosmological luminosity distances.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 104 571 The properties of the radio-loud quasars
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name SDSS name of radio-loud quasars
(HHMMSS.ss+DDMMSS.s)
20- 24 F5.3 --- z Redshift
26- 30 F5.2 mag imag SDSS i magnitude
32- 43 F12.8 10-7W/Hz/m2 FUV Rest-frame flux at 2500 Angstroem
(in erg/s/Hz/m2)
45- 56 F12.8 10-7W/Hz/m2 Fradio Rest-frame flux at 5GHz (in erg/s/Hz/m2)
58- 69 F12.8 10-7W/Hz/m2 FX Rest-frame flux at 2keV (in erg/s/Hz/m2)
71- 74 F4.2 [-] logR The radio loudness (in logarithm scale)
76- 80 F5.2 --- alphar Radio slope
82- 92 F11.8 --- DM Distance modulus
94-104 F11.9 --- e_DM Error on distance modulus
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Acknowledgements:
Long Huang, huanglong20122021(at)163.com
(End) Patricia Vannier [CDS] 14-Jul-2022