Bhat, S. S; Paul, K. T; Subramaniam, A; Mathew, B
(IOP Publishing, 2016-06)
We present an optical spectroscopic study based on 41 spectr
a of 4 Her and 32 spectra of 88 Her,
obtained over a period of 6 months. We estimate the rotationa
l velocity of these stars from He
I
lines in the
blue ...