发表机构
Anton Pannekoek Institute for Astronomy, University of Amsterdam; ASTRON, Netherlands Institute for Radio Astronomy（阿姆斯特丹大学安东·潘内科克天文学研究所; 荷兰射电天文研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过高分辨率光谱观测，确认TYC 2834-1385-1为色球活动的BY Dra型双星系统，并测定其轨道周期，为低频射电巡天发现的活动双星提供了首批光谱验证。
AI 中文摘要
最近研究表明，具有活跃色球的密近双星在低频射电波段会发射圆偏振辐射，这促使人们对其轨道性质进行详细研究。我们利用Mercator望远镜上的HERMES光谱仪，对先前未分类的射电源TYC 2834-1385-1进行了高分辨率（R=85,000）光学光谱观测。我们将该源识别为双线光谱双星，并从金属吸收线和Ca II发射线两方面测量了视向速度。我们发现轨道周期为P=3.601±0.002天，两个子星的视向速度半振幅几乎相等。该系统表现出强烈的Ca II H和K线发射，这与包含两颗相似晚G型/早K型主序星的BY Dra型双星一致，初步分类为K0V。这是继低频射电巡天识别后，对色球活动双星的首次光谱确认之一。
英文摘要
Close binaries with active chromospheres have recently been shown to emit circularly polarised radio emission at low frequencies, motivating detailed studies of their orbital properties. We present high-resolution ($R=85,000$) optical spectroscopy of TYC 2834-1385-1, a previously unclassified radio source, obtained with the HERMES spectrograph on the Mercator Telescope. We identify the source as a double-lined spectroscopic binary and measure radial velocities from both metallic absorption and Ca II emission lines. We find an orbital period of $P=3.601\pm0.002$ days and nearly equal radial-velocity semi-amplitudes for the two components. The system exhibits strong Ca II H and K emission, which is consistent with a BY Dra-type binary containing two similar late-G/early-K main-sequence stars, with a preliminary classification of K0V. This represents one of the first spectroscopic confirmations of a chromospherically active binary following its identification in a low-frequency radio survey.
Comments5 pages, 1 figure
Journal refTamara A. S. Bleeker et al 2026 Res. Notes AAS 10 272
