食双星及活动星系核的观测及研究
1. 变源的测光观测研究
1. Di-Fu Guo , Kai Li , Fen Liu, Huai-Zhen Li and Xin-Yi Liu. WISE J185503.7+592234: A particularly low mass ratio contact binary approaching merger. MNRAS, 2023.
2. Difu Guo , Kai Li, Fen Liu, Huaizhen Li, Xinyi Liu, and Xu Chen. WISE J141530.7+592234: A Very Low Mass Ratio Contact Binary with Significant Light Curve Variations. PASP, 2023.
3. Di-Fu. Guo ,Kai Li , Fen Liu, Huai-Zhen Li, Qi-Qi Xia,Xing Gao, Xiang Gao, Xu Chen, Dong-Yang Gao, and Guo-You Sun. The first photometric and orbital period investigation of an extremely low mass ratio contact binary with a sudden period change TYC 4002-2628-1. MNRAS, 2022.
4. Searching for eclipsing binaries in the area of RA: 02h21m36s, +57◦11m32s. Monthly Notices of the Royal Astronomical Society, 2020.
5. D. F. Guo, K. Li, S. M. Hu, and X. Chen. The first photometric and period investigation of the total eclipse binary system V0474 cam. Publications of the Astronomical Society of the Pacific, 2018.
6. D.-F. Guo , K. Li ,, S.-M. Hu , Y.-G. Jiang , D.-Y. Gao , X. Chen. The highest rate orbital period increasing contact binary LP UMa revisited. New Astronomy, 2016.
7. Discovery of a faint eclipsing binary GSC 02265-01456. Journal of Astrophysics and Astronomy, 2015.
8. Di-Fu Guo, Kai Li,, Shao-Ming Hu, Yun-Guo Jiang, Dong-Yang Gao and Xu Chen. Discovery of a deep, low mass ratio overcontact binary GSC 03517-00663. Research in Astronomy and Astrophysics,
9. Di-Fu GUO, Kai LI, Shao-Ming HU, Yun-Guo JIANG, Dong-Yang GAO, and Xu CHEN. Discovery of a W UMa type binary GSC 03553-00845. Publications of the Astronomical Society of Japan, 2014.
10. Difu Guo∗, Shaoming Hu & Xu Chen. Optical Monitoring of OT 546 in 2009. Journal of Astrophysics and Astronomy, 2014.
11. Di-Fu Guo, Shao-Ming Hu, Jun Tao, Hong-Xing Yin, Xu Chen and Hong-Jian Pan. Optical monitoring of the Seyfert galaxy NGC 4151 and possible periodicities in its historical light curve. Research in Astronomy and Astrophysics, 2014.
12. DI-FU GUO, SHAO-MING HU, XU CHEN, DONG-YANG GAO, AND JUN-JU DU. Sky brightness at Weihai Observatory of Shandong University. Publications of the Astronomical Society of the Pacific, 2014.
