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Dark energy constraints after the new Planck data
Xia JQ(夏俊卿); Li H(李虹); 张新民;Xia, JQ; Li, H; Zhang, XM
Source PublicationPHYSICAL REVIEW D
AbstractThe Planck Collaboration has recently published maps of the cosmic microwave background radiation with the highest precision. In the standard flat Lambda cold dark matter framework, Planck data show that the Hubble constant H-0 is in tension with that measured by the several direct probes on H-0. In this paper, we perform a global analysis from the current observational data in the general dark energy models and find that resolving this tension requires the dark energy model with its equation of state (EOS) w not equal -1. Firstly, assuming the w to be a constant, the Planck data favor w < -1 at about 2 sigma confidence level when combining with the supernovae "supernova legacy survey" compilation. Consequently the value derived on H-0, H-0 71.3 +/- 2.0 km s(-1) Mpc(-1) (68% C.L.) is consistent with that from direct H-0 probes. We then investigate the dark energy model with a time-evolving w, and obtain the 68% C.L. constraints w(0) = -0.81 +/- 0.19 and w(alpha) = -1.9 +/- 1.1 from the Planck data and the "supernova legacy survey" compilation. Current data still slightly favor the quintom dark energy scenario with EOS across the cosmological constant boundary w -1.
Subject AreaAstronomy & Astrophysics; Physics
WOS IDWOS:000323894000005
ADS Bibcode2013PhRvD..88f3501X
ADS URLhttps://ui.adsabs.harvard.edu/abs/2013PhRvD..88f3501X
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2013PhRvD..88f3501X/citations
Citation statistics
Cited Times:65 [INSPIRE]
Cited Times:63 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Xia JQ,Li H,张新民;Xia, JQ,et al. Dark energy constraints after the new Planck data[J]. PHYSICAL REVIEW D,2013,88(6):63501.
APA 夏俊卿,李虹,张新民;Xia, JQ,Li, H,&Zhang, XM.(2013).Dark energy constraints after the new Planck data.PHYSICAL REVIEW D,88(6),63501.
MLA 夏俊卿,et al."Dark energy constraints after the new Planck data".PHYSICAL REVIEW D 88.6(2013):63501.
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