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[vsnet-chat 5945] Re: (fwd) ASAS variables: identifications by Anton Paschke
- Date: Tue, 4 Feb 2003 19:16:49 +0900 (JST)
- To: vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
- From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-chat 5945] 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
- Sender: owner-vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
Re: (fwd) ASAS variables: identifications by Anton Paschke
> >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).
Wouldn't this imply that the object is indeed a binary?
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