Search Publications
Properties of Flare Events on M Stars from LAMOST Spectral Survey Based on Kepler and TESS Light Curves
Han, Xianming L.; Misra, Prabhakar; Long, Liu +7 more
A catalog of M stars has been published from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope data release 7 (LAMOST DR7). We cross-matched the LAMOST M catalog with Kepler, Kepler 2 (K2) and Transiting Exoplanet Survey Satellite (TESS) surveys. We obtained the light curves from the Kepler and TESS surveys. We detected 20,047 flare ev…
A Revised Graduated Cylindrical Shell Model and its Application to a Prominence Eruption
Zhang, Qing-Min; Hou, Zhen-Yong; Bai, Xian-Yong
In this paper, the well-known graduated cylindrical shell (GCS) model is slightly revised by introducing longitudinal and latitudinal deflections of prominences originating from active regions (ARs). Subsequently, it is applied to the three-dimensional (3D) reconstruction of an eruptive prominence in AR 13110, which produced an M1.7 class flare an…
Variable Star Detection in the Field of Open Cluster NGC 188
Zhang, Yu; Esamdin, Ali; Song, Fang-Fang +2 more
This work presents the charge-coupled device (CCD) photometric survey of the old open cluster NGC 188. Time-series V-band photometric observations were conducted for ten nights in 2017 January using the Nanshan One-meter Wide-field Telescope to search for variable stars in the field of the cluster. A total of 25 variable stars, including one new v…
The Study of Helium Variations in Star Clusters Using China Space Station Telescope
Deng, Licai; Li, Chengyuan; Ji, Xin +2 more
The China Space Station Telescope (CSST) is a 2 m space-based optical-UV telescope. Its primary goal is to carry out a high-resolution photometric imaging survey of a 17,500 square degree sky area using the on board Survey Camera. With its wide field of view (1.1 square degrees) and a mosaic imager containing 640 million pixels, studying the diffe…
The H I Gas Fraction Scaling Relation of the Green Pea Galaxies
Luo, A. -Li; Kong, Xiao; Zhao, Yong-Heng +3 more
Green Pea galaxies are compact galaxies with high star formation rates. However, limited samples of Green Pea galaxies have H I 21 cm measurements. Whether the H I gas fraction (f H I ≡ M H I/M ⋆) of Green Pea galaxies follows the existing scaling relations between the f H I and NUV-r color or linear com…
Searching For Wide Binary Stars with Non-coeval Components in the Southern Sky
Malkov, Oleg; Kniazev, Alexey
We have completed our observational program to search for wide binary systems with non-coeval components in the southern sky and report our results here. The final set of four systems was spectroscopically investigated in this paper. No binary systems with components of different ages were found among them. Taking into account our previous studies…
Possible Origin of a Newly Discovered GeV Gamma-Ray Source Fermi J1242.5+3236
Mo, Xiu-Rong; Luo, Ming-Hong; Tan, Hong-Bin +2 more
Based on the first 13.4 yr of Fermi science data in the energy range from 300 MeV to 500 GeV, we discovered a bright GeV gamma-ray source with a ~5.64σ detection, named Fermi J1242.5+3236, which has an offset of about 0.°0996 from a nearby star-forming galaxy NGC 4631. When using the 12 yr' data, the detection significance of Fermi J1242.5+3236 is…
The Bar-Bulge Relation in Non-dwarf SB0 Galaxies in the Central Region of Coma Cluster
Hasan, S. N.; Poloji, Nagamani; Hasan, Priya
In this paper we explore the formation of bars and present the bulge and bar properties and their correlations for a sample of lenticular barred (SB0) and lenticular unbarred (S0) galaxies in the central region of the Coma Cluster using HST/ACS data. In our sample, we identified bar features using the luminosity profile decomposition software GALF…
First Detailed Analysis of a Relatively Deep, Low Mass-ratio Contact Binary: ATO J108.6991+27.8306
Zhang, Yu; Ma, Shuo; Liu, Jinzhong +3 more
We present the first detailed photometric analysis of ATO J108.6991+27.8306 (hereinafter as J108). The short-period close binary J108 was observed by the Nanshan 1 m Wide Field Telescope of the Xinjiang Astronomical Observatory. The obtained BVRI-band light curves were used to determine the photometric solution by using the 2003 version of the Wil…
Physical and Kinematical Characteristics of Wolf-Rayet Central Stars and their Host Planetary Nebulae
Ali, A.; Awad, Z.
We address the physical and kinematical properties of Wolf-Rayet [WR] central stars (CSs) and their host planetary nebulae (PNe). The studied sample comprises all [WR] CSs that are currently known. The analysis is based on recent observations of the parallax, proper motion, and color index of [WR] CSs from the Gaia space mission's early third rele…