45 citations · 156 across the 15 of their papers we have counts for
4 papers · 1 filter
Checking the reliability of equivalent width R23 for estimating metallicities of galaxies
Y. C. Liang, F. Hammer, S. Y. Yin
We verify whether the O/H abundances of galaxies can be derived from the equivalent width (EW) R23 instead of the extinction-corrected flux R23, and eventually propose a method of…
The direct oxygen abundances of metal-rich galaxies derived from electron temperature
Y. C. Liang, F. Hammer, S. Y. Yin +3
We aim to derive the electron temperature Te in the gas of metal-rich star-forming galaxies, which can be obtained from their ratios of auroral lines [O II]7320,7330 to nebular lin…
The study about the revised R23-P method for metallicity estimates based on ~20,000 SDSS galaxies
S. Y. Yin, Y. C. Liang, B. Zhang
We select ~20000 metal-rich star-forming galaxies from the SDSS-DR2 to study the R23-P method suggested by Pilyugin et al. for metallicity estimates. The oxygen abundances derived…
Hardness ratio evolutionary curves of gamma-ray bursts expected by the curvature effect
Y. -P. Qin, C. -Y. Su, J. H. Fan +1
We have investigated the gamma-ray bursts pulses assumed to arise from relativistically expending fireballs. We find, due to the curvature effect, the evolutionary curve of the raw…