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Photometric And Spectroscopic Studies Of V582 Lyr And V1016 Oph, Yao Cheng, Li-Yun Zhang, Xianming L. Han, Liu Long, Hongpeng Lu, Qiang Yue, Linyan Jiang
Photometric And Spectroscopic Studies Of V582 Lyr And V1016 Oph, Yao Cheng, Li-Yun Zhang, Xianming L. Han, Liu Long, Hongpeng Lu, Qiang Yue, Linyan Jiang
Scholarship and Professional Work - LAS
We present new CCD photometric light curves about two eclipsing binaries of V582 Lyr and V1016 Oph. Our observations were carried out by the SARA 91.4 cm telescope of America in 2016 and the 60 cm telescope of Chile in 2018. V582 Lyr’s spectra type was classified as K5, and its radial velocity was determined using the LAMOST spectral survey. There are absorptions in the observed Hα line and excess emissions in the subtracted Hα line, which show weak chromospheric activity. We obtained the updated ephemeris information for V582 Lr and V1016 Oph, and found that their orbital periods are …
Magnetic Activities Of M-Type Stars Based On Lamost Dr5 And Kepler And K2 Missions, Hong-Peng Lu, Li-Yun Zhang, Jianrong Shi, Xianming L. Han1, Dongwei Fan, Liu Long, Qingfeng Pi
Magnetic Activities Of M-Type Stars Based On Lamost Dr5 And Kepler And K2 Missions, Hong-Peng Lu, Li-Yun Zhang, Jianrong Shi, Xianming L. Han1, Dongwei Fan, Liu Long, Qingfeng Pi
Scholarship and Professional Work - LAS
We performed a statistical study of magnetic activities of M-type stars by combining the spectra of LAMOST DR5 with light curves from the Kepler and K2 missions. We mainly want to study the relationship between chromospheric activity and flares, and their relations of magnetic activity and rotation period. We have obtained the maximum catalog of 516,688 M-type stellar spectra of 480,912 M stars from LAMOST DR5 and calculated their equivalent widths of chromospheric activity indicators (Hα, Hβ, Hγ, Hδ, Ca II H&K, and He I D3). Using the Hα indicator, 40,464 spectra of 38,417 M stars show chromospheric activity, and …