御夫座星盘的结构:日食进入期间中性钾的光谱观测
Structure in the disc of epsilon Aurigae: Spectroscopic observations of neutral Potassium during eclipse ingress
摘要:
本文报道了御夫座双星7699A中性钾线在食入和全食过程中的等效宽度变化。线强度的增加和平台与新的系统参数和干涉成像的限制,加上辅助数据同时报告。总之,这些数据揭示了过境光盘的结构细节,以前从未测量过。测量的环和间隙的位置不立即适合任何建议的模型,使用简单的潮汐估计。然而,我们预测出口时间的利益,并敦促继续监测这颗星在平衡的日食,并鼓励理论治疗的光盘子结构进行追求。
英文摘要:
Variations in the equivalent width of the neutral potassium line at 7699A are reported, during ingress and into totality of the current eclipse of the enigmatic eclipsing binary epsilon Aurigae. The increase and plateaus of line strength are correlated with new system parameters and interferometric imaging constraints, plus ancillary data being reported contemporaneously. Together, these data reveal structural details of the transiting disc, never before measured. Measured ring and gap placements do not immediately fit any proposed model using simple tidal estimation. However, we predict egress times of interest and urge continued monitoring of this star during the balance of its eclipse, and encourage theoretical treatment of the disc substructure to be pursued.
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