The Distance to NGC 5128 (Centaurus A)
The Distance to NGC 5128 (Centaurus A)
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DOI：
10.1071/as09061
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发表时间：
2009-11
影响因子：
6.3
通讯作者：
G. Harris;M. Rejkuba;W. Harris
中科院分区：
文献类型：
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作者：
G. Harris;M. Rejkuba;W. Harris
摘要本文综述了各种高精度的方法，现在可以用来确定距离NGC 5128。这些方法包括：造父变星、TRGB（红巨星分支的顶端）、PNLF（行星状星云光度函数）、SBF（表面亮度波动）和长周期变星（LPV）米拉星。通过对这些方法及其不确定性的评估，我们得出了NGC 5128的最佳估计距离为3.8±0.1 Mpc，并发现这一平均值现在得到了现有数据的很好支持。我们还讨论了NGC 5128的作用，更普遍的河外距离尺度作为一个测试平台，这些关键方法之间的最直接的可能的比较。
Abstract In this paper we review the various high precision methods that are now available to determine the distance to NGC 5128. These methods include: Cepheids, TRGB (tip of the red giant branch), PNLF (planetary nebula luminosity function), SBF (surface brightness fluctuations), and Long Period Variable (LPV) Mira stars. From an evaluation of these methods and their uncertainties, we derive a best-estimate distance of 3.8±0.1 Mpc to NGC 5128 and find that this mean is now well supported by the current data. We also discuss the role of NGC 5128 more generally for the extragalactic distance scale as a testbed for the most direct possible comparison among these key methods.