Identification of beryllium hydride isotopomer lines in sunspot umbral spectra

A high resolution spectrum of FTS sunspot umbra of NSO/Kitt Peak was used to conduct a search for the molecular absorption lines due to BeH, BeD and BeT isotopomers. Analysis led to estimates of identification of the molecular lines of bands A - X (0,0), (1,1) and (2,2) for BeH, A - X (0,0), (1,1), (2,2) and (3,3) for BeD and of A - X (0,0), (1,1) and (2,2) for BeT. Among the identified lines, those which are well resolved were selected for measurements to calculate equivalent widths. The values of effective rotational temperature T were estimated for bands A - X(1,1) and (2,2) of BeH, A - X(1,1) of BeD and A - X(2,2) of BeT to be 4228K, 4057K, 3941K and 3243K respectively. Spektri umbre sunceve pege visoke rezolucije snimljene spektrografom FTS opservatorije NSO/Kitt Peak iskorisceni su za izucavanje apsorpcionih linija molekula izotopomera BeH, BeD i BeT. Izvrsena je identifikacija linija molekula u spektralnim trakama A-X(0,0), (1,1) i (2,2) molekule BeH, A-X(0,0), (1,1), (2,2) i (3,3) molekule BeD, i A-X(0,0), (1,1) i (2,2) molekule BeT. Od identifikovanih linija izabrane su dobro razdvojene linije i izmerene su njihove ekvivalentne sirine. Na osnovu tih podataka su procenjene rotacione efektivne temperature trake A-X(1,1) i (2,2) molekule BeH, A X(1,1) molekule BeD i A-X(2,2) molekule BeT i iznose redom 4228 K, 4057 K, 3941 K i 3243 K.