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[vsnet-chat 5942] Re: (fwd) ASAS variables: identifications by Anton Paschke
- Date: Tue, 4 Feb 2003 13:56:11 +0900 (JST)
- To: vsnet-chat@kusastro.kyoto-u.ac.jp
- From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
- Subject: [vsnet-chat 5942] Re: (fwd) ASAS variables: identifications by Anton Paschke
- Delivered-To: vsnet-chat-archive@ooruri.kusastro.kyoto-u.ac.jp
- Delivered-To: vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
- Delivered-To: vsnet-chat@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
Re: (fwd) ASAS variables: identifications by Anton Paschke
Sebastian Otero wrote:
>What's the evolutionary status of a subgiant M- type star?
>I thought that normal stars hadn't had time enough to evolve to that
>stage due to the age of the universe...
Exactly. I think only a star within a semi-detached binary system
can be observed on such stage.
The assumption that the transversal velocity of this star is 10 km/s
would possibly not be real. If it is 100 km/s, which is commonly
observed for the halo-origin stars, M_V becomes about +1 (giant).
Sincerely,
Hitoshi
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