CO luminosity-Linewidth correlation of low and high redshift galaxies and its possible cosmological utilization

Abstract

A linear correlation has been proposed between the CO luminosity (${\mathrm{L}}_{\mathrm{CO}}^{\prime }$) and full-width at half maximum (FWHM) for high-redshift (z > 1) submillimeter galaxies. However, the controversy concerning the ${\mathrm{L}}_{\mathrm{CO}}^{\prime }$-FWHM correlation seems to have been caused by the use of heterogeneous samples (e.g., different transition lines) and/or data with large measurement uncertainties. In order to avoid the uncertainty caused by using different rotational transitions, in this work we make an extensive effort to select only CO($J=1-0$) data from the literature. We separate these wide-ranging redshift data into two samples : the low-redshift (z < 1) and high-redshift (z > 1) samples. The samples are corrected for lensing magnification factors if gravitational-lensing effects appeared in the observations. The correlation analysis shows that there exists significant ${\mathrm{L}}_{\mathrm{CO}}^{\prime }$-FWHM correlations for both the low-redshift and high-redshift samples. A comparison of the low- and high-redshift ${\mathrm{L}}_{\mathrm{CO}}^{\prime }$-FWHM correlations does not show strong evolution with redshift. Assuming that there is no evolution, we can use this relation to determine the model independent distances of high-redshift galaxies. We then constrain cosmological models with the calibrated high-redshift CO data and the sample of Type Ia supernovae in the Union 2.1 compilation. In the constraint for wCDM with our samples, the derived values are w_{0} = -1.02 {\pm} 0.17, Ω_{m0} = 0.30{\pm}0.02, and H_{0} = 70.00 {\pm}0.60 km\,s^{-1}\,Mpc^{-1}.

arXiv comment11 pages, 7 figures, accepted for publication in MNRAS. Please see the summary talk of this paper : https://www.youtube.com/watch?v=VEDoCUw6g1c

References in corpus (18)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Exploring the Expansion History of the Universe
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34
• A survey of molecular gas in luminous sub-millimetre galaxies
• Intense Star Formation within Resolved Compact Regions in a Galaxy at z=2.3
• CO(1-0) in z>2 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
• A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z>2
• The rapid assembly of an elliptical galaxy of 400 billion solar masses at a redshift of 2.3
• Blind detections of CO J = 1--0 in 11 H-ATLAS galaxies at z = 2.1--3.5 with the GBT/Zpectrometer
• Imaging the Molecular Gas in a z=3.9 Quasar Host Galaxy at 0.3" Resolution: A Central, Sub-Kiloparsec Scale Star Formation Reservoir in APM 08279+5255
• CO J=1-0 spectroscopy of four submillimeter galaxies with the Zpectrometer on the Green Bank Telescope
• The Discovery of the Most Distant Known Type Ia Supernova at Redshift 1.914
• Imaging low order CO emission from the z=4.12 QSO PSS 2322+1944
• VLA Mapping of the CO(1-0) Line in SMM J14011+0252
• Large gas reservoirs and free-free emission in two lensed star-forming galaxies at z=2.7
• High Redshift Standard Candles: Predicted Cosmological Constraints

Cited by in corpus (5)

• Luminosity-duration relation of fast radio bursts
• A scaling relation in [C II]-detected galaxies and its likely application in cosmology
• Kiloparsec-scale imaging of the CO(1-0)-traced cold molecular gas reservoir in a z~3.4 submillimeter galaxy
• The Photometric Analysis of the Environment Around Two Dusty Star-Forming Galaxies at $z\sim 2$
• Implications for galaxy property estimation revealed by CO luminosity-FWHM relations in local star-forming galaxies