Submitted on: 19 July 2000.
Revised on: 21 August 2000.
Accepted on: 09 September 2000.
Research in Astronomy and Astrophysics
http://reply.papertrans.cn/3/264/26392/26392-12.png
http://reply.papertrans.cn/3/264/26392/26392-13.png
http://reply.papertrans.cn/3/264/26392/26392-14.png
Submitted on: 05 July 2023.
Revised on: 26 July 2023.
Accepted on: 31 July 2023.
Research in Astronomy and Astrophysics
http://reply.papertrans.cn/3/264/26392/26392-16.png
http://reply.papertrans.cn/3/264/26392/26392-17.png
Submitted on: 01 October 2014.
Revised on: 04 November 2014.
Accepted on: 10 November 2014.
Research in Astronomy and Astrophysics
http://reply.papertrans.cn/3/264/26392/26392-19.png
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