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A photometric-spectroscopic study of the infrared-excess eclipsing binary V2364 Cyg
Jiang, Lin-Qiao; Dai, Hai-Feng; Wang, Shuang +2 more
The eclipsing binary V2364 Cyg is an A7V-type contact binary with a period of 0.5921 d. We present six spectra from LAMOST and BVRc light curves (LCs), which are simultaneously analyzed to obtain the absolute physical parameters. The first light maxima are brighter than the second ones by up to $\mathrm{0}_{.}^\mathrm{m}{038}$ , $\mathr…
Influence of the convective mixing-length parameter α on the chemical abundances in the case of metal-poor giant HD 122563
Zhao, Gang; Song, Nan; Alexeeva, Sofya
One-dimensional (1D) model atmospheres are still the most commonly used tool for the determination of stellar chemical composition. Convection in the model is usually treated by mixing-length theory (MLT). The mixing-length parameter α is generally calibrated from the Sun and applied to all other stars. The metal-poor giant, HD 122563, is an impor…
Searching for exoplanets by HEPS II. detecting earth-like planets in habitable zone around planet hosts within 30 pc
Yang, Ming; Zhang, Hui; Zhou, Ji-Lin +4 more
HEPS (Habitable ExoPlanet Survey) is a planning astrometry satellite that aims to find Earth-like planets in the solar neighbourhood. In this paper, we selected 140 planet harboring stars within 30 pc of the solar system to be potential targets for HEPS. We calculate the detection probability of the planet in habitable zone (HZ) for each system us…
Binary star detection in the open cluster King 1 field
Saleh, Parvej Reja; Hazarika, Debasish; Dar, Ajaz Ahmad +2 more
A rarely studied open cluster, King 1 is observed using the 1.3-m telescope equipped with a 2k × 4k CCD at Vainu Bappu Observatory, India. We analyze the photometric data obtained from CCD observations in both B and V bands. Out of 132 detected stars in the open cluster King 1 field, we have identified four stellar variables, and two among them ar…