Quasinormal modes of a black hole surrounded by quintessence
Quasinormal modes of a black hole surrounded by quintessence
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DOI：
10.1088/0264-9381/22/21/011
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发表时间：
2005-10
影响因子：
3.5
通讯作者：
Songbai Chen;Jiliang Jing
中科院分区：
文献类型：
--
作者：
Songbai Chen;Jiliang Jing
利用三阶WKB近似，我们计算了被静态和球对称精质包围的黑洞周围的无质量标量场扰动的准正态频率。我们的结果表明，由于精粹的存在，标量场的衰减速度更快。此外，我们还注意到，典型的状态参数λ（压力pq与能量密度ρq的比值）对准正态频率起着重要作用。随着状态参数的增大，实部增大，虚部绝对值减小。这意味着标量场在较大的柱精情况下衰减得更慢。
Using the third-order WKB approximation, we evaluate the quasinormal frequencies of massless scalar field perturbation around a black hole which is surrounded by static and spherically symmetric quintessence. Our result shows that due to the presence of quintessence, the scalar field damps more rapidly. Moreover, we also note that the quintessential state parameter ϵ (the ratio of pressure pq to the energy density ρq) plays an important role for the quasinormal frequencies. As the state parameter ϵ increases, so does the real part and the absolute value of the imaginary part decreases. This means that the scalar field decays more slowly in the larger ϵ quintessence case.