ChJAA Vol 2, No 5 (2002) / Xu

On the Red Edge of the δ Scuti Instability Strip

Yan Xu, Zhi-Ping Li, Li-Cai Deng, Da-Run Xiong

Abstract

The δScuti star catalogue is used to derive the observational locations of such stars on the HR diagram. The theoretical and observational instability strips are compared to check the theoretical red edge obtained by considering non-local time-dependent convection theory. The observational instability strip almost overlaps with the theoretical one, but the observed blue and red envelopes are hotter than the theoretical edges. The distribution of δScuti stars in the pulsation strip is not uniform.

Keywords


stars: variables: δScuti --- stars: oscillations --- stars: HR diagram

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