From boud at astro.uni.torun.pl  Tue Apr  7 13:19:58 2009
From: boud at astro.uni.torun.pl (Boud Roukema)
Date: Tue, 7 Apr 2009 13:19:58 +0200 (CEST)
Subject: [Cos-top] recent cosmic topology work
Message-ID: <Pine.LNX.4.64.0904071305160.23316@adjani.astro.uni.torun.pl>

hi everyone on cos-top,

The Ulm group continue to work on T^3 models - here's a nice new
paper:

http://arXiv.org/abs/0903.3133


Other news: there's an observational signature of cosmic topology
which occurs for flat compact models but not for curved compact models
(assuming standard physical components of the Universe in both cases).

The good news for cosmic topology in general: this observational
signature has been detected to extremely high significance!  :)

The bad news for the Poincare space: this observational signature has
been detected to extremely high significance!  :(

Details: http://arxiv.org/abs/0904.0975

A Poincare space is certainly not excluded by the argument, but it
would require an exotic explanation for the observational signature
rather than a simple explanation. Occam's razor suggests that we may
have to accept T^3 (or another flat compact space).

Anyway, see the paper to find out what this observational signature
is.

cheers
boud



From reboucas.marcelo at gmail.com  Tue Apr  7 19:05:51 2009
From: reboucas.marcelo at gmail.com (Marcelo J. Reboucas)
Date: Tue, 7 Apr 2009 14:05:51 -0300
Subject: [Cos-top] recent cosmic topology work
In-Reply-To: <Pine.LNX.4.64.0904071305160.23316@adjani.astro.uni.torun.pl>
References: <Pine.LNX.4.64.0904071305160.23316@adjani.astro.uni.torun.pl>
Message-ID: <405df0860904071005i7a716a76rbea62204cea4c291@mail.gmail.com>

Dear Boud,

Thank you very much for calling my attention for the references.

Best wishes,
Marcelo.

On Tue, Apr 7, 2009 at 8:19 AM, Boud Roukema <boud at astro.uni.torun.pl>wrote:

> hi everyone on cos-top,
>
> The Ulm group continue to work on T^3 models - here's a nice new
> paper:
>
> http://arXiv.org/abs/0903.3133 <http://arxiv.org/abs/0903.3133>
>
>
> Other news: there's an observational signature of cosmic topology
> which occurs for flat compact models but not for curved compact models
> (assuming standard physical components of the Universe in both cases).
>
> The good news for cosmic topology in general: this observational
> signature has been detected to extremely high significance!  :)
>
> The bad news for the Poincare space: this observational signature has
> been detected to extremely high significance!  :(
>
> Details: http://arxiv.org/abs/0904.0975
>
> A Poincare space is certainly not excluded by the argument, but it
> would require an exotic explanation for the observational signature
> rather than a simple explanation. Occam's razor suggests that we may
> have to accept T^3 (or another flat compact space).
>
> Anyway, see the paper to find out what this observational signature
> is.
>
> cheers
> boud
>
> _______________________________________________
> Cos-top mailing list
> Cos-top at cosmo.torun.pl
> http://cosmo.torun.pl/mailman/listinfo/cos-top
>
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