The Secondary Star of the HgMn Binary Phi Her
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The binary nature of the bright (V = 4.2 mag) Mercury-Manganese star Phi Her has been known since 1976 and it was considered a low-amplitude single-lined SB. In a recent study we found evidence for lines of the secondary star. Other recent results from interferometry provide a good measure of the light ratio. It is very plausible that the secondary is a late main-sequence A star. We find the rotational velocity of the secondary to be ~42 +/- 5 km/s.
Four pages. Four figures. Presented to the Working Group on Ap Stars at IAU General Assembly in Prague, August 2006
Four pages. Four figures. Presented to the Working Group on Ap Stars at IAU General Assembly in Prague, August 2006