1999AJ....118.2993G

On the basis of a new classification-resolution spectrum, we find that HR 8799, a known member of the newly discovered γ Doradus variable star class, is a λ Bootis star. Spectral synthesis, in conjunction with fluxes from visible spectrophotometry and the TD-1 satellite, yields T_eff=7430 K, logg=4.35, microturbulent velocity ξ_t_=2.7 km.s^–1, and metallicity [M/H]=-0.47 for HR 8799, confirming its metal-weak nature. HR 8799 is also a ``Vega-like'' star in that it shows excess flux at 60 µm, probably due to a circumstellar dust shell or disk. Thus, this star links three astrophysically interesting classes of stars and may provide potentially important constraints on the physics of, and the interconnections between, the λ Bootis phenomenon and the γ Doradus pulsation phenomenon.