Search Publications
Diffuse Interstellar Bands λ6379, λ6614, and λ6660 in the LAMOST-MRS Spectra
Luo, A. -Li; Hou, Wen; Zhao, Yong-Heng +2 more
Diffuse interstellar bands (DIBs) have always been a mysterious existence in astronomical research. In this work, we provide more DIB samples to slightly uncover this mystery. With the LAMOST medium-resolution survey (MRS) spectra, we detected three DIBs λ6379, λ6614, and λ6660, obviously superimposed on the spectra of 11,003 stars. These spectra …
KIC 10417986: Spectroscopic Confirmation of the Nature of the Binary System with a δ Scuti Component
Esamdin, Ali; Fu, Jian-Ning; Yang, Tao-Zhi +9 more
KIC 10417986 is a short orbital period (0.0737 day) ellipsoidal variable star with a δ Sct and γ Dor hybrid pulsation component discovered by Kepler. The ground-based spectroscopic observations were carried out in the winters of 2020 and 2021 to investigate the binary nature of this star. We derive the orbital parameters using the rvfit code with …
A Stellar Ranging Scheme Based on the Second-order Correlation Measurement
Li, Jian; Xu, Can; Liu, Yinshen +5 more
Stellar ranging is the basis for stellar dynamics research and in-depth research on astrophysics. The parallax method is the most widely used and important basic method for stellar ranging. However, it needs to perform high-precision measurement of the parallax angle and the baseline length together. We aim to propose a new stellar ranging scheme …
Spectral Behavior and Flaring Activity of II Peg in the Ultraviolet
Sanad, M. R.
We have studied the spectral behavior of the II Peg binary system in the ultraviolet band by using International Ultraviolet Explorer (IUE) observations over the period 1979-1993. The ultraviolet observations reveal indication of flare activity in both chromosphere and transition region with their enhanced emission lines. Before and after the flar…
Ensemble Numerical Simulations of Realistic SEP Events and the Inspiration for Space Weather Awareness
Li, Gang; Wang, Xin; Luo, Bingxian +5 more
The solar energetic particle (SEP) event is a kind of hazardous space weather phenomena, so its quantitative forecast is of great importance from the aspect of space environmental situation awareness. We present here a set of SEP forecast tools, which consists of three components : (1) a simple polytropic solar wind model to estimate the backgroun…
The First Photometric Study of W UMa Binary System V1833 Ori
Tanrıver, Mehmet; Bulut, Ahmet
The first photometric solution in the B, V, R c and I c filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric observations. We analyzed the BVRI photometric light curves of the system, using PHOEBE 0.31a, a binary star modeling program, with the Wilson-Devinney metho…