Chromospheric activity in several single late-type stars

New high-resolution echelle spectra of six single late-type Pleiades-like stars （V368 Cep, EP Eri, DX Leo, GJ 211, PW And and V383 Lac） were obtained with the 2.16 meter telescope at Xinglong Station in 2008-2010. Using the spectral subtraction technique, we analyzed our spectroscopic data and calcu...

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Bibliographic Details
Published inResearch in astronomy and astrophysics Vol. 15; no. 2; pp. 252 - 274
Main Authors Zhang, Li-Yun, Pi, Qing-Feng, Zhu, Zhong-Zhong
Format Journal Article
LanguageEnglish
Published 01.02.2015
Subjects
activity
chromospheres
Emission analysis
Indicators
late-type
Mathematical analysis
Measuring instruments
Meters
Modulation
Spectra
spectroscopic
Stars
stars：rotation
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Summary:New high-resolution echelle spectra of six single late-type Pleiades-like stars （V368 Cep, EP Eri, DX Leo, GJ 211, PW And and V383 Lac） were obtained with the 2.16 meter telescope at Xinglong Station in 2008-2010. Using the spectral subtraction technique, we analyzed our spectroscopic data and calculated the equiva- lent widths of excess emission from several indicators of chromospheric activity （Na I D1, D2, Hoz and Ca II infrared triplet lines）. All our results using chromospheric activ- ity indicators confirmed the previous findings. In addition, the maximum amplitudes of chromospheric rotational modulation and the ratio of EW8542/EW8498 were found to rise with increasing v sin i velocity.
Bibliography:11-5721/P
ObjectType-Article-1
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ISSN:1674-4527
2397-6209
DOI:10.1088/1674-4527/15/2/009