# Constraints on a φCDM model from strong gravitational lensing and updated Hubble parameter measurements

## Abstract

We constrain the scalar field dark energy model with an inverse power-law potential, i.e., V(φ) ∝ φ{sup −α} (α > 0), from a set of recent cosmological observations by compiling an updated sample of Hubble parameter measurements including 30 independent data points. Our results show that the constraining power of the updated sample of H(z) data with the HST prior on H{sub 0} is stronger than those of the SCP Union2 and Union2.1 compilations. A recent sample of strong gravitational lensing systems is also adopted to confine the model even though the results are not significant. A joint analysis of the strong gravitational lensing data with the more restrictive updated Hubble parameter measurements and the Type Ia supernovae data from SCP Union2 indicates that the recent observations still can not distinguish whether dark energy is a time-independent cosmological constant or a time-varying dynamical component.

- Authors:

- Department of Physics, National Tsing Hua University, Hsinchu, 300 Taiwan (China)
- Department of Astronomy, Beijing Normal University, Beijing 100875 (China)

- Publication Date:

- OSTI Identifier:
- 22381992

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL CONSTANT; GRAVITATIONAL LENSES; LIMITING VALUES; NONLUMINOUS MATTER; POTENTIALS; SCALAR FIELDS; SUPERNOVAE

### Citation Formats

```
Chen, Yun, Geng, Chao-Qiang, Cao, Shuo, Huang, Yu-Mei, and Zhu, Zong-Hong, E-mail: chenyun@bao.ac.cn, E-mail: geng@phys.nthu.edu.tw, E-mail: caoshuo@bnu.edu.cn, E-mail: huangymei@gmail.com, E-mail: zhuzh@bnu.edu.cn.
```*Constraints on a φCDM model from strong gravitational lensing and updated Hubble parameter measurements*. United States: N. p., 2015.
Web. doi:10.1088/1475-7516/2015/02/010.

```
Chen, Yun, Geng, Chao-Qiang, Cao, Shuo, Huang, Yu-Mei, & Zhu, Zong-Hong, E-mail: chenyun@bao.ac.cn, E-mail: geng@phys.nthu.edu.tw, E-mail: caoshuo@bnu.edu.cn, E-mail: huangymei@gmail.com, E-mail: zhuzh@bnu.edu.cn.
```*Constraints on a φCDM model from strong gravitational lensing and updated Hubble parameter measurements*. United States. doi:10.1088/1475-7516/2015/02/010.

```
Chen, Yun, Geng, Chao-Qiang, Cao, Shuo, Huang, Yu-Mei, and Zhu, Zong-Hong, E-mail: chenyun@bao.ac.cn, E-mail: geng@phys.nthu.edu.tw, E-mail: caoshuo@bnu.edu.cn, E-mail: huangymei@gmail.com, E-mail: zhuzh@bnu.edu.cn. Sun .
"Constraints on a φCDM model from strong gravitational lensing and updated Hubble parameter measurements". United States.
doi:10.1088/1475-7516/2015/02/010.
```

```
@article{osti_22381992,
```

title = {Constraints on a φCDM model from strong gravitational lensing and updated Hubble parameter measurements},

author = {Chen, Yun and Geng, Chao-Qiang and Cao, Shuo and Huang, Yu-Mei and Zhu, Zong-Hong, E-mail: chenyun@bao.ac.cn, E-mail: geng@phys.nthu.edu.tw, E-mail: caoshuo@bnu.edu.cn, E-mail: huangymei@gmail.com, E-mail: zhuzh@bnu.edu.cn},

abstractNote = {We constrain the scalar field dark energy model with an inverse power-law potential, i.e., V(φ) ∝ φ{sup −α} (α > 0), from a set of recent cosmological observations by compiling an updated sample of Hubble parameter measurements including 30 independent data points. Our results show that the constraining power of the updated sample of H(z) data with the HST prior on H{sub 0} is stronger than those of the SCP Union2 and Union2.1 compilations. A recent sample of strong gravitational lensing systems is also adopted to confine the model even though the results are not significant. A joint analysis of the strong gravitational lensing data with the more restrictive updated Hubble parameter measurements and the Type Ia supernovae data from SCP Union2 indicates that the recent observations still can not distinguish whether dark energy is a time-independent cosmological constant or a time-varying dynamical component.},

doi = {10.1088/1475-7516/2015/02/010},

journal = {Journal of Cosmology and Astroparticle Physics},

number = 02,

volume = 2015,

place = {United States},

year = {Sun Feb 01 00:00:00 EST 2015},

month = {Sun Feb 01 00:00:00 EST 2015}

}