The long-period variables of Fornax – I. Search, discovery and periods
The long-period variables of Fornax – I. Search, discovery and periods
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Fornax 的长周期变量 – I. 搜索、发现和周期
DOI：
10.1093/mnras/226.4.943
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发表时间：
1987
影响因子：
4.8
通讯作者：
M. Irwin
中科院分区：
文献类型：
--
作者：
S. Demers;M. Irwin
21个视觉UKST板，测量的APM，被用来确定30个长期变量在天炉座。确定了其中26个的期限。没有大振幅的米拉变量已被检测到，我们观察到一组低振幅的变量。这些星族II变星的绝对视星等基本上与银河系球状星团中的LPV和SMC中NGC 371附近的LPV相同。然而，它们的周期和振幅分布是不同的。我们的视觉测光不足以揭示这些变星的更多物理性质，但从它们的颜色我们可以说，近四分之一的变星似乎是碳星。
Twenty-one visual UKST plates, measured by the APM, were used to identify 30 long-period variables in Fornax. Periods are determined for 26 of them. No large-amplitude Mira variable has been detected; we observe a group of low-amplitude variables. These Population II variables have essentially the same absolute visual magnitude as the LPVs in galactic globular clusters and the LPVs near NGC 371 in the SMC. Their period and amplitude distributions are, however, different. Our visual photometry is not extensive enough to reveal more of the physical properties of these variables, but from their colour we can state that nearly a quarter of the variables appear to be carbon stars.