| Perturbations of the quintom models of dark energy and the effects on observations | |
Zhao GB(赵公博); Xia JQ(夏俊卿) ; Feng B(冯波); Zhang XM(张新民); Zhao, GB; Xia, JQ; Li, MZ; Feng, B; Zhang, XM
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| 2005 | |
| Source Publication | PHYSICAL REVIEW D
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| Volume | 72Issue:12Pages:123515 |
| Corresponding Author | Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; Inst Theoret Phys, D-69120 Heidelberg, Germany |
| Subtype | Review |
| Abstract | We study in this paper the perturbations of the quintom dark energy model and the effects of quintom perturbations on the current observations. Quintom describes a scenario of dark energy where the equation of state gets across the cosmological constant boundary w = -1 during evolution. We present a new method to show that the conventional dark energy models based on a single k-essence field and perfect fluid cannot act as the quintom due to the singularities and classical instabilities of perturbations around w= -1. One needs to add extra degrees of freedom for successful quintom model building. There are no singularities or classical instabilities in perturbations of realistic quintom models and they are potentially distinguishable from the cosmological constant. Basing on the realistic quintom models in this paper we provide one way to include the perturbations for dark energy models with parametrized equation of state across -1. Compared with those assuming no dark energy perturbations, we find that the parameter space which allows the equation of state to get across -1 will be enlarged, in general, when including the perturbations. |
| Subject Area | Astronomy & Astrophysics; Physics |
| DOI | 10.1103/PhysRevD.72.123515 |
| URL | 查看原文 |
| Indexed By | INSPIREHEP ; ADS |
| Language | 英语 |
| WOS Research Area | Astronomy & Astrophysics ; Physics |
| WOS Subject | Astronomy & Astrophysics ; Physics, Particles & Fields |
| WOS ID | WOS:000234274900029 |
| ADS Bibcode | 2005PhRvD..72l3515Z |
| ADS URL | https://ui.adsabs.harvard.edu/abs/2005PhRvD..72l3515Z |
| ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2005PhRvD..72l3515Z/citations |
| inspireid | 687863 |
| inspireURL | https://inspirehep.net/literature/687863 |
| Citation statistics |
Cited Times:210 [INSPIRE]
Cited Times:213 [ADS]
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| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/240980 |
| Collection | 理论物理室 粒子天体物理中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Zhao GB,Xia JQ,Feng B,et al. Perturbations of the quintom models of dark energy and the effects on observations[J]. PHYSICAL REVIEW D,2005,72(12):123515. |
| APA | 赵公博.,夏俊卿.,冯波.,张新民.,Zhao, GB.,...&Zhang, XM.(2005).Perturbations of the quintom models of dark energy and the effects on observations.PHYSICAL REVIEW D,72(12),123515. |
| MLA | 赵公博,et al."Perturbations of the quintom models of dark energy and the effects on observations".PHYSICAL REVIEW D 72.12(2005):123515. |
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