Re: Intelligent signals from globular clusters?

Ed wrote:

> You know, GCs are not expected to host planets as their stars are so
> metal poor. Low metallicity is a barrier to planet formation. There was
> a detection of a planet by HST in GC M4, but that was the exception
> rather than the rule

I wasn't aware if low metallicity in a given star was so certain to
rule out the scope for planet formation out of its acretion disk.
Certainly, the experience with nearby systems would appear to suggest
quite differently. For example, the stars Epsilon Eridani and Rho
Coronae Borealis (two nearby stars I just picked out at random) each
have a metallicity of about *half* of that of our Sun, and yet both
exhibit cometary dusk disks and other charactersitics that hint at a
planetary system being in place:-

http://www.solstation.com/stars/eps-erid.htm

http://www.solstation.com/stars2/rho-crb.htm

AA

.

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