Seismology and rotation of the Herbig Ae star HD 104237 .

HD 104237 is the first pulsating Herbig Ae star for which very recently a significant number of pulsation frequencies has been detected by means of high-resolution spectroscopy. The high quality radial velocity curve based on 1888 individual echelle spectra obtained in 42 nights in 1999 and 2000 revealed for the first time by spectroscopic means multiperiodic oscillations in a pre-main sequence star: a total of 8 frequencies have been detected so far, 5 amongst them were detected at a very high confidence level Böhm et al. \cite{pulsation}. This result encouraged us to develop asterosismological models for such young pre-main sequence pulsator (Dupret et al. \cite{dupret}), but the dramatic lack of a precise knowledge of the fundamental stellar parameters appear still to be critical. A summary of the main results of the pulsation study are presented and first indications for a stellar rotational modulation are exhibited.