The cool Galactic R Coronae Borealis variable DY Persei
The cool Galactic R Coronae Borealis variable DY Persei
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炫酷的银河 R 北极星变星 DY Persei
DOI：
10.1051/0004-6361:200500118
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
C. W. Chen
中科院分区：
文献类型：
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作者：
L. Začs;Wen;O. Alksnis;D. Kinoshita;F. Musaev;T. Brice;K. Sanchawala;H. T. Lee;C. W. Chen
第一CCD测光结果在最近的深光衰退，高分辨率光谱，提出了DY英仙座。光谱显示钠D线的可变蓝移特征。C线很强，而中子俘获元素没有增强.相对于12 CN的同位素13 CN（2，0）线与碳星星U Hya的线具有相似的强度。这些都证实了DY Per的RCB性质和抛射云的存在。在-197.3和-143.0 km s-1处至少有两个云被发现。一颗星星在0.四是西部，二是5、从北到北，从南到北。这颗匿名伴星的观测颜色指数（B-V）= 0.68和（V-R）-1.1，可能是一颗前景星星。
Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented for DY Persei. The spectra show variable blueshifted features in the sodium D lines. The C lines are strong whereas neutron- capture elements are not enhanced. The isotopic 13 CN(2, 0) lines relative to 12 CN are of similar strength with those for the carbon star U Hya. All these confirm the RCB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at −197.3 and −143.0 km s −1 . A star was detected about 0. 4t o the west and 2 . 5 to the north from DY Per. This anonymous companion, with observed colour indices (B − V) = 0.68 and (V − R) � 1.1, may be a foreground star.