| Title | Dark energy and fate of the Universe |
| Authors | Li, Xiao Dong Wang, Shuang Huang, Qing Guo Zhang, Xin Li, Miao |
| Affiliation | Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China Key Laboratory of Frontiers in Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China Department of Physics, College of Sciences, Northeastern University, Shenyang 110004, China Center for High Energy Physics, Peking University, Beijing 100080, China |
| Issue Date | 2012 |
| Citation | 2012,55(7),1330-1334. |
| Abstract | We explore the ultimate fate of the Universe by using a divergence-free parametrization for dark energy w(z)=w0+wa [ln(2+z) / (1+z) ln 2] . Unlike the Chevallier-Polarski-Linder parametrization, this parametrization has well behaved, bounded behavior for both high redshifts and negative redshifts, and thus can genuinely cover many theoretical dark energy models. After constraining the parameter space of this parametrization by using the current cosmological observations, we find that, at the 95.4% confidence level, our Universe can still exist at least 16.7 Gyr before it ends in a big rip. Moreover, for the phantom energy dominated Universe, we find that a gravitationally bound system will be destroyed at a time t=P ??2 |1+3w(-1) | / [6?? |1+ w(-1) |] , where P is the period of a circular orbit around this system, before the big rip. ? 2012 Science China Press and Springer-Verlag Berlin Heidelberg. |
| URI | http://hdl.handle.net/20.500.11897/461457 |
| DOI | 10.1007/s11433-012-4748-z |
| Indexed | EI |
| Appears in Collections: | 物理学院 |
