25 citations · 51 across the 6 of their papers we have counts for
6 papers
The -based dimensionless accretion rate and its connection with the corona for AGN
Y. Q. Chen, Y. S. Liu, W. H. Bian
With respect to the full width at half-maximum (), the broad line dispersion () was preferred as a velocity tracer to calculate the sin…
Tracing the origin of moving groups I. The γ Leo moving group with high resolution spectra from the Subaru Telescope
Xilong Liang, Jingkun Zhao, Gang Zhao +7
We present chemical abundances of 15 stars in the γ Leo moving group based on high-resolution spectra with the Subaru High Dispersion Spectrograph. The sample was picked up by appl…
The puzzling abundance pattern of HD134439 and HD134440
Y. Q. Chen, G. Zhao
Abundances of 18 elements are determined for the common proper-motion pair, HD134439 and HD134440, which shows high [Mn/Fe] and low [α/Fe] ratios as compared to normal halo stars.…
Chemical compositions of four barium stars
Y. C. Liang, G. Zhao, Y. Q. Chen +2
Chemical compositions of four barium stars HD 26886, HD 27271, HD 50082 and HD 98839 are studied based on high resolution, high signal-to-noise Echelle spectra. Results show that a…
Sulphur and iron abundances in halo stars
P. E. Nissen, Y. Q. Chen, M. Asplund +1
From equivalent widths of the SI lines at 8694 A, Israelian & Rebolo (2001) and Takada-Hidai et al. (2002) have derived a surprisingly high sulphur-to-iron ratio ([S/Fe] = 0.5 to 0…
Sc and Mn abundances in disk and metal-rich halo stars
P. E. Nissen, Y. Q. Chen, W. J. Schuster +1
Sc and Mn abundances are determined for 119 F and G main-sequence stars with -1.4 < [Fe/H] < +0.1, representing stars from the thin disk, the thick disk and the halo. The results i…