On the Red Edge of the δ Scuti Instability Strip  

作　　者：Yan Xu Zhi-Ping Li Li-Cai Deng Da-Run Xiong 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012 [2]Department of Physics,Tianjin Normal University,Tianjin 300073 [3]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008

出　　处：《Chinese Journal of Astronomy and Astrophysics》2002年第5期441-448,共8页中国天文和天体物理学报（英文版）

基　　金：This paper is supported in part by the National Natural Science Foundation of China (NSFC) through grant 10173013 ;by the Ministry of Science and Technology of China through grant G19990754; XDR thanks NSFC for continuous support.

摘　　要：The δ Scuti 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 nonlocal 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 δ Scuti stars in the pulsation strip is not uniform.The δ Scuti 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 nonlocal 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 δ Scuti stars in the pulsation strip is not uniform.

关 键 词：stars: variables: δ Sct - stars: oscillations ?stars: HR diagram 

分 类 号：P145[天文地球—天体物理]