Tracing the origin of moving groups I. The γ Leo moving group with high resolution spectra from the Subaru Telescope
arXiv:1808.01242 · doi:10.3847/1538-4357/aacf8a
Abstract
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 applying wavelet transform to UVW velocity compo- nents of stars in the solar neighbourhood. Both photometric and spectroscopic method have been used to determine the stellar parameters of stars. Abun- dances of 11 elements including Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Y and Ba are measured. Our results show that the member stars display a wide metallicity distribution with abundance ratios similar to Milky way disk stars. We presume that the γ Leo moving group is originated from dynamical effects probably related to the Galactic spiral arms.
arXiv comment21 pages, 6 figures, apj in press
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