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- Chinese Academy of SciencesCN784 papers
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22 papers · 2 filters
Chromospheric activity on the late-type star V1355 Ori using Lijiang 1.8-m and 2.4-m telescopes
Qing-Feng Pi, Li-Yun Zhang, Liang Chang +4
We obtained new high-resolution spectra using the Lijiang 1.8-m and 2.4-m telescopes to investigate the chromospheric activities of V1355 Ori as indicated in the behaviors of Ca ii…
The Broken Lane of a Type II Radio Burst Caused by Collision of a Coronal Shock with a Flare Current Sheet
Guannan Gao, Min Wang, Ning Wu +3
We investigated a peculiar metric type II solar radio burst with a broken lane structure, which was observed on November 13, 2012. In addition to the radio data, we also studied th…
Exploring the helium core of the delta Scuti star CoRoT 102749568 with asteroseismology
Xinghao Chen, Yan Li, Guifang Lin +2
Based on regularities in rotational splittings, we seek possible multiplets for the observed frequencies of CoRoT 102749568. Twenty-one sets of multiplets are identified, including…
Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations
LiYun Zhang, QingFeng Pi, Xianming L. Han +2
We present new 14 high-resolution echelle spectra to discuss the level of chromospheric activity of DM UMa in {He I} D3, {Na I} D1, D2, Halpha, and {Ca II} infrared triplet lines (…
A low-mass-ratio and deep contact binary as the progenitor of the merger V1309 Sco
Li-Ying Zhu, Er-Gang Zhao, Xiao Zhou
Nova Sco 2008 (=V1309 Sco) is an example of a V838 Mon type eruption rather than a typical classical nova. This enigmatic object was recently shown to have resulted from the merger…
Simultaneous longitudinal and transverse oscillation in an active filament
V. Pant, R. Mazumder, D. Yuan +3
We report on the co-existence of longitudinal and transverse oscillations in an active filament. On March 15 2013, a M1.1 class flare was observed in the active region AR 11…