来自MUSICOS 1998观测的EI Eri的多普勒图和地表自转差异

arXiv: Astrophysics Pub Date : 2008-11-03 DOI:10.1063/1.3099204

Zs. KHov'ari, A. Washuettl, B. Foing, K. Vida, J. Bartus, K. Ol'ah, the Musicos 98 team

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引用次数: 1

摘要

由于临界旋转周期为1.947天，因此不可能从单个地点获得时间分辨率的图像，因此我们展示了1998年MUSICOS多站点运动期间收集的快速旋转的活动双星EI Eri的时间序列多普勒图像。从表面重建中测量到微弱的太阳型微分旋转，以及微小的极向经向流动。

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Doppler maps and surface differential rotation of EI Eri from the MUSICOS 1998 observations

We present time‐series Doppler images of the rapidly‐rotating active binary star EI Eri from spectroscopic observations collected during the MUSICOS multi‐site campaign in 1998, since the critical rotation period of 1.947 days makes it impossible to obtain time‐resolved images from a single site. From the surface reconstructions a weak solar‐type differential rotation, as well as a tiny poleward meridional flow are measured.

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arXiv: Astrophysics

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