B stars
alp And - Alpheratz
Lines identification
Chemically peculier B star: Hg Mn
Variable Star of alpha2 CVn type
alp And Alpheratz A.D. (2000) 00 08 23.2 De (2000) +29 05 25.5 Sp. Type B8 IV-V HgMn R. V. -10.1 km.s<\sup>-1 B 1.95 V 2.06 R 2.09
Alp And beyongs to the group of HgMn stars (narrow spectral type range B7 to B9 and luminosity class from V to III), first identified by Morgan (1933), althought at that time, Hg II 3984 was unidentified. Enhanced Mn II appears at 4136, 4206 and 4252. Hg II 3984 could be variable.
Echelle spectrum ( R = 11 000)
Line identification
