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We use all available baryon acoustic oscillation distance measurements and Hubble parameter data to constrain the cosmological constant $\Lambda$, dynamical dark energy, and spatial curvature in simple cosmological models. We find that the…

宇宙学与河外天体物理 · 物理学 2018-07-19 Joseph Ryan , Sanket Doshi , Bharat Ratra

We use Pantheon Type Ia supernova (SN Ia) apparent magnitude, DES-3yr binned SN Ia apparent magnitude, Hubble parameter, and baryon acoustic oscillation measurements to constrain six spatially flat and non-flat cosmological models. These…

宇宙学与河外天体物理 · 物理学 2021-04-21 Shulei Cao , Joseph Ryan , Bharat Ratra

Cosmic microwave background (CMB) anisotropy (spatial inhomogeneity) data provide the tightest constraints on the Hubble constant, matter density, spatial curvature, and dark energy dynamics. Other data, sensitive to the evolution of only…

宇宙学与河外天体物理 · 物理学 2019-09-04 Chan-Gyung Park , Bharat Ratra

We use updated Hubble parameter and baryon acoustic oscillation data, as well as other lower-redshift Type Ia supernova, Mg II reverberation-measured quasar, quasar angular size, H II starburst galaxy, and Amati-correlated gamma-ray burst…

宇宙学与河外天体物理 · 物理学 2022-05-31 Shulei Cao , Bharat Ratra

We constrain two non-flat time-evolving dark energy cosmological models by using Hubble parameter data, Type Ia supernova apparent magnitude measurements, and baryonic acoustic oscillation peak length scale observations. The inclusion of…

宇宙学与河外天体物理 · 物理学 2017-03-22 Omer Farooq , Data Mania , Bharat Ratra

We use HII starburst galaxy apparent magnitude measurements to constrain cosmological parameters in six cosmological models. A joint analysis of HII galaxy, quasar angular size, baryon acoustic oscillations peak length scale, and Hubble…

宇宙学与河外天体物理 · 物理学 2020-08-14 Shulei Cao , Joseph Ryan , Bharat Ratra

We use higher-redshift gamma-ray burst (GRB), HII starburst galaxy (HIIG), and quasar angular size (QSO-AS) measurements to constrain six spatially flat and non-flat cosmological models. These three sets of cosmological constraints are…

宇宙学与河外天体物理 · 物理学 2021-01-15 Shulei Cao , Joseph Ryan , Narayan Khadka , Bharat Ratra

We use the Busca et al. (2012) measurement of the Hubble parameter at redshift z = 2.3 in conjunction with 21 lower z measurements, from Simon et al. (2005), Gaztanaga et al. (2009), Stern et al. (2010), and Moresco et al. (2012), to place…

宇宙学与河外天体物理 · 物理学 2015-06-12 Omer Farooq , Bharat Ratra

We use Hubble parameter versus redshift data from Stern, et al(2010) and Gazta\~{n}aga, et al (2009) to place constraints on model parameters of constant and time-evolving dark energy cosmological models. These constraints are consistent…

宇宙学与河外天体物理 · 物理学 2013-07-12 Yun Chen , Bharat Ratra

We use the Risaliti & Lusso (2015) compilation of 808 X-ray and UV flux measurements of quasars (QSOs) in the redshift range $0.061 \leq z \leq 6.28$, alone and in conjuction with baryon acoustic oscillation (BAO) and Hubble parameter…

宇宙学与河外天体物理 · 物理学 2020-04-21 Narayan Khadka , Bharat Ratra

We use baryon acoustic peak measurements by Eisenstein et al. (2005) and Percival et al. (2007a) and galaxy cluster gas mass fraction measurements of Allen et al. (2008) to constrain parameters of three different dark energy models. For…

天体物理学 · 物理学 2009-09-24 Lado Samushia , Bharat Ratra

We use updated Type Ia Pantheon+ supernova, baryon acoustic oscillation, and Hubble parameter (now also accounting for correlations) data, as well as new reverberation-measured C IV quasar data, and quasar angular size, H II starburst…

宇宙学与河外天体物理 · 物理学 2023-05-19 Shulei Cao , Bharat Ratra

In this paper, we use a newly compiled sample of ultra-compact structure in radio quasars and strong gravitational lensing systems with quasars acting as background sources to constrain six spatially flat and non-flat cosmological models…

宇宙学与河外天体物理 · 物理学 2022-12-07 Tonghua Liu , Shuo Cao , Xiaolei Li , Hao Zheng , Yuting Liu , Wuzheng Guo , Chenfa Zheng

We study how the determination of the Hubble constant from cosmological distance measures is affected by models of dark energy and vice versa. For this purpose, constraints on the Hubble constant and dark energy are investigated using the…

天体物理学 · 物理学 2008-11-26 Kazuhide Ichikawa , Tomo Takahashi

We constrain cosmological parameters using only Hubble parameter data and quantify the impact of future Hubble parameter measurements on parameter estimation for the most typical dark energy models. We first constrain cosmological…

宇宙学与河外天体物理 · 物理学 2018-09-27 Jia-Jia Geng , Rui-Yun Guo , Anzhong Wang , Jing-Fei Zhang , Xin Zhang

In this paper we compare data to theory. We use a compilation of the most recent cosmic microwave background (CMB) measurements to constrain Hubble's constant h, the baryon fraction Omega_b, and the cosmological constant lambda. We fit h-,…

天体物理学 · 物理学 2008-02-03 Charles H. Lineweaver , Domingos Barbosa , Alain Blanchard , James G. Bartlett

We use angular size versus redshift data for galaxy clusters from Bonamente et al. (2006) to place constraints on model parameters of constant and time-evolving dark energy cosmological models. These constraints are compatible with those…

宇宙学与河外天体物理 · 物理学 2013-07-12 Yun Chen , Bharat Ratra

We use the 2% distance measurement from our reconstructed baryon acoustic oscillations (BAOs) signature using the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) Luminous Red Galaxies (LRGs) from Padmanabhan et al. (2012) and Xu et al.…

宇宙学与河外天体物理 · 物理学 2015-06-04 Kushal T. Mehta , Antonio J. Cuesta , Xiaoying Xu , Daniel J. Eisenstein , Nikhil Padmanabhan

We use observational data from Type Ia Supernovae (SN), Baryon Acoustic Oscillations (BAO), Cosmic Microwave Background (CMB) and observational Hubble data (OHD), and the Markov Chain Monte Carlo (MCMC) method, to constrain the cosmological…

宇宙学与河外天体物理 · 物理学 2015-03-13 Jianbo Lu , Emmanuel N. Saridakis , M. R. Setare , Lixin Xu

In the paper, we consider two models in which dark energy is coupled with either dust matter or dark matter, and discuss the conditions that allow more time for structure formation to take place at high redshifts. These models are expected…

宇宙学与河外天体物理 · 物理学 2021-03-08 Shulei Cao , Tong-Jie Zhang , Xinya Wang , Tingting Zhang
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