The angular diameter of R Doradus: A nearby Mira-like star

被引：37
作者：
Bedding, TR
Zijlstra, AA
vonderLuhe, O
Robertson, JG
Marson, RG
Barton, JR
Carter, BS
机构：
[1] EUROPEAN SO OBSERV,D-85748 GARCHING,GERMANY
[2] ANGLO AUSTRALIAN OBSERV,EPPING,NSW 2121,AUSTRALIA
[3] S AFRICAN ASTRON OBSERV,ZA-7935 CAPE TOWN,SOUTH AFRICA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1997年 / 286卷 / 04期
关键词：
techniques; interferometric; stars; AGB and post-AGB; imaging; individual; R Dor; alpha Ori; W Hya;
D O I：
10.1093/mnras/286.4.957
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We find the angular diameter of R Doradus to be 57 +/- 5 mas, exceeding that of Betelgeuse and implying that R Dor is larger in apparent size than every star except the Sun. R Dor is shown to be closely related to the Mira variables. We estimate an effective temperature of 2740 +/- 190 K, a distance of 61 +/- 7 pc, a luminosity of 6500 +/- 1400 L. and a radius of 370 +/- 50 R.. The characteristics of R Dor are consistent with it being near the edge of a Mira instability strip. We detect non-zero closure phases from R Dor, indicating an asymmetric brightness distribution. We also observed W Hydrae, a small-amplitude Mira, for which we find an angular diameter of 44 +/- 4 mas.
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页码：957 / &
页数：7
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