This directory holds the Z0 fit. Every metal band is drawn over it below, so what the metals change is visible line by line rather than only in the table. ← all stars
band
Teff
log g
log n(He)/n(H)
fitted Z
reduced χ²
Z-1
54450
6.023
+0.34
—
2.18
Z0
53699
6.140
+0.39
—
2.01
Z1
54051
6.417
+0.60
—
1.96
Z free
53817
6.307
held -0.15
+0.53
1.94
Line by line
residuals
Offset from the line centre in Ångström across, normalised flux up. The observed spectrum is the thin black trace; each model is one metal band. The strip under each profile is observed minus model for whichever fit the buttons above select — all of them switch together, and they share a vertical scale, so a residual cannot look small merely because its own panel was rescaled. The figure in the top right is how far apart the bands get at their widest, in per cent of the continuum; each is at its own best fit, so that is what is left after every band has done what it can.