 |
Figure 1: Sample HES prism spectrum of a candidate FHB star. Note that wavelength increases from right to left. The sharp drop at about 5400 Å is due to the sensitivity cutoff of the IIIa-J emulsion. |
| Open with DEXTER | |
In the text
 |
Figure 2:
Automatic classification of
A-type stars in the two-dimensional feature space c1 versus
sum of Balmer line equivalent widths
 .
In the left panel we
show the learning sample of 228 stars before the classification is
applied; in the right panel, crosses and dots denote the main-sequence
and FHB stars that have been classified as main-sequence stars,
respectively, and empty and full circles are the objects that have been
classified as FHB stars. |
| Open with DEXTER | |
In the text
 |
Figure 3: Adjusting the cost factor t2o by evaluating the classifcation results. For further explanation see text. |
| Open with DEXTER | |
In the text
 |
Figure 4: Distribution of the 8321 HES FHB candidates on the sky. |
| Open with DEXTER | |
In the text
 |
Figure 5: Distance distribution of the FHB candidate sample of 8321 stars, assuming that they are all indeed FHB stars. |
| Open with DEXTER | |
In the text