DOPPLER IMAGING OF SPOTTED STARS : APPLICATION TO THE RS CANUM VENATICORUM STAR HR 1099.
DOPPLER IMAGING OF SPOTTED STARS : APPLICATION TO THE RS CANUM VENATICORUM STAR HR 1099.
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斑点星的多普勒成像：应用于 RS Canum VENATICORUM STAR HR 1099。
DOI：
10.1086/131208
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发表时间：
1983
影响因子：
3.5
通讯作者：
G. Penrod
中科院分区：
文献类型：
--
作者：
Steven S. Vogt;G. Penrod
本文讨论了一种对某些快速旋转的斑点星表面成像的技术。该方法利用了波长位置之间的对应关系，整个旋转加宽的光谱线和空间位置的恒星盘。RS CVn星星HR 1099的初步多普勒图像显示，这些斑点在形状和位置上与太阳冕洞的X射线图像惊人地相似。建议RS CVn和其他活跃的晚型恒星上的大星星斑点出现在低纬度，作为太阳复合体的放大类似物，但当它们向极地迁移时，它们更类似于太阳冕洞的光球类似物。星点的演化似乎与太阳大规模磁场的演化非常相似。
A technique for imaging the surfaces of certain rapidly rotating spotted stars is discussed. The method exploits the correspondence between wavelength position across a rotationally broadened spectral line and spatial position across the stellar disk. Preliminary Doppler Images of the RS CVn star HR 1099 show spots which exhibit a striking similarity in shape and location to X ray images of solar coronal holes. It is suggested that the large star spots on RS CVn's and other active late-type stars emerge at low latitude as scaled-up analogs of solar complexes, but as they migrate poleward, they more closely resemble photospheric analogs of solar coronal holes. The evolution of starspots appears remarkably similar to that of large-scale magnetic fields of the sun.