中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Optical flare events on the RS Canum Venaticorum star UX Arietis

文献类型:期刊论文

作者Cao DT(曹东涛)1,2,3; Gu SH(顾盛宏)1,2,3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2017-06-01
卷号17期号:6
ISSN号1674-4527
关键词Stars: Activity Stars: Chromospheres Stars: Binaries: Spectroscopic Stars: Flare Stars: Individual (Ux Ari)
DOI10.1088/1674-4527/17/6/55
产权排序第1完成单位
文献子类Article
英文摘要

Based on long-term high-resolution spectroscopic observations obtained during five observing runs from 2001 to 2004, we study optical flare events and chromospheric activity variability of the very active RS CVn star UX Ari. By means of the spectral subtraction technique, several optical chromospheric activity indicators (including the He I D-3, Na I D-1, D-2 doublet, H alpha and Ca II IRT lines) covered in our echelle spectra were analyzed. Four large optical flare events were detected on UX Ari during our observations, which show prominent He I D-3 line emission together with great enhancement in emission of the H alpha and Ca II IRT lines and strong filled-in or emission reversal features in the Na I D-1, D-2 doublet lines. The newly detected flares are much more energetic than previous discoveries, especially for the flare identified during the 2002 December observing run. Optical flare events on UX Ari are more likely to be observed around two quadratures of the system, except for our optical flares detected during the 2004 November observing run. Moreover, we have found rotational modulation of chromospheric activity in the H alpha and Ca II IRT lines, which suggests the presence of chromospherically active longitudes over the surface of UX Ari. The change in chromospherically active longitudes among our observing runs, as well as the variation in chromospheric activity level from 2001 to 2004, indicates a long-term evolution of active regions.

学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
WOS关键词ACTIVE BINARY-SYSTEMS ; SIMULTANEOUS H ALPHA ; CHROMOSPHERIC ACTIVITY ; II PEGASI ; ROTATIONAL MODULATION ; CLOSE BINARIES ; BV PHOTOMETRY ; IUE SPECTRA ; SZ-PISCIUM ; EMISSION
资助项目Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China[10373023] ; National Natural Science Foundation of China[10773027] ; National Natural Science Foundation of China[11333006] ; Chinese Academy of Sciences project[KJCX2-YW-T24]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号WOS:000408362700007
资助机构Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China[10373023, 10773027, 11333006] ; Chinese Academy of Sciences project[KJCX2-YW-T24]
源URL[http://ir.ynao.ac.cn/handle/114a53/11925]  
专题云南天文台_系外行星研究组
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Cao DT(曹东涛)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714
Cao DT,Gu SH. Optical flare events on the RS Canum Venaticorum star UX Arietis[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(6).
APA Cao DT,&Gu SH.(2017).Optical flare events on the RS Canum Venaticorum star UX Arietis.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(6).
MLA Cao DT,et al."Optical flare events on the RS Canum Venaticorum star UX Arietis".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.6(2017).

入库方式: OAI收割

来源:云南天文台

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