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Re: [APML] 47 Tucanae

To: astro-photo@seds.org
Subject: Re: [APML] 47 Tucanae
From: Matt BenDaniel <matt@starmatt.com>
Date: Wed, 01 May 2002 02:19:42 -0400
In-Reply-To: <000801c1f0d6$e2b89620$8074fea9@d5g2w8>
References: <003301c1f0a7$acc54a60$6401a8c0@jeff><5.1.0.14.0.20020501015223.0361fa00@pop3.norton.antivirus>
Reply-To: astro-photo@seds.org
Sender: owner-astro-photo@seds.org

At 11:10 PM 4/30/2002 -0700, Daniel Reyna wrote:
>Great resolution but this one also looks a bit magenta/red.  

Last year I asked Prof. Stephen Zepf (co-author of a book I read entitled Globular Cluster Systems) about the color of globular clusters.

Globular clusters are very old. Their remaining main sequence stars are smaller than our sun and redder. Some of the stars have neared end of life and have turned into red giants. This means that globulars should be slightly reddish overall.

The core of a globular cluster is also thought to have "stripped cores" from gravitational interactions. These are hot and blue. So the core is a bit blue.

>The color seems
>to take abway the difference in the hues of the stars.

I'll take a closer look at that.
--
Matt BenDaniel
matt@starmatt.com
http://starmatt.com

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References:
- [APML] 47 Tucanae
  - From: Matt BenDaniel <matt@starmatt.com>

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