... stars

Based on observations collected at the German-Spanish Astronomical Center, Calar Alto, Spain.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... [X/Fe]

As usual, [X/Fe] = $\log~(N_{\rm X}/N_{\rm Fe})-\log~(N_{\rm X}/N_{\rm Fe})_\odot$ represents the normalized logarithmic abundance ratio of elements X and Fe.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... factors

The collision factor $S_{\!\!\rm H}$ is defined as a scaling parameter applied to Drawin's (1968, 1969) formula for hydrogen collision rates.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.