Asteroseismology and mode driving of the Herbig Ae star HD 104237

Details Asteroseismology and mode driving of the Herbig Ae star HD 104237 Asteroseismology and mode driving of the Herbig Ae star HD 104237

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007coast.150...59d&link_type=abstract

Communications in Astroseismology, Vol. 150, p.59

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Eight pulsation frequencies were detected in the Herbig Ae star HD 104237 during two observational campaigns in 1999 -- 2000 (Böhm et al. 2004). Moreover, Böhm et al. (in preparation) detected recently in their data two independent signatures of a signal at 95 hr that corresponds probably to rotational modulation. We present here a seismic study of this Pre-Main Sequence star based on these observations. Different possible interpretations of the pulsation spectrum are considered. The driving of the pulsation modes is not explained by standard models, the observed frequencies being too high for δ Scuti-type pulsations. We consider the effect of He accumulation in its partial ionization zones as a possible explanation for this driving.

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