Advances in Astrophysics

Download PDF (1836.4 KB) PP. 75 - 85 Pub. Date: August 1, 2020

DOI: 10.22606/adap.2020.53002

• Le Tian^*
  1College of Science&College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China 2College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China
• ZhongZhong Zhu
  1College of Science&College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China 2College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China
• Liyun Zhang
  1College of Science&College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China 2College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China
• Shuai Wang
  1College of Science&College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China 2College of big data and information engineering, Guizhou University, Guiyang 550025, P. R. China

Big data of the spectroscopic survey of the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) are important for studying the properties of infrared source. We obtained 5946 spectra of 4843 infrared stars through cross matching of LAMOST DR3 and WISE. We measured the equivalent widths of the Hα line and other Balmer lines, Ca ii H and IRT lines. According to the EWs of Hα lines, we found there are 390 spectra of 294 infrared stars showing strong activity. We found that 77 spectra were first observed by LAMOST. We found 36 objects show chromospheric activity variation in the Hα emission line. In the end, we gave the physical mechanism of the early-type stars and late-type stars activity.

infrared source, stars, stellar chromospheric activity, LAMOST

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