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main page: GrassmannCosmoFun2009**These are just rough notes - feel free to correct them, add links, etc.** from the Grassmann ian Conference in Fundamental Cosmology (Grasscosmofun'09). These are **not** official proceedings. The speakers might even disagree that they said anything even vaguely related to what are in these online notes! Don't say you weren't warned.
# Thu 17 Sep 2009

## Nemanja KALOPER - inflaton etc

## Arman SHAFIELOO - Is cosmic acceleration slowing down?

## Masahiro MORIKAWA - Bose-Einstein condensate DE/DM (BEC)

## Mikhail KATANAEV - geometric theory of defects

## Marek SZYDLOWSKI - whirlpool scenario

## Ivan DEBONO - weak lensing forecasts for DE, neutrinos and initial conditions

## Stefano CAMERA (Turino) - weak lensing in unified DM/DE models

## Boud ROUKEMA - Some spaces are more equal than others

- Thu 17 Sep 2009
- Nemanja KALOPER - inflaton etc
- Arman SHAFIELOO - Is cosmic acceleration slowing down?
- Masahiro MORIKAWA - Bose-Einstein condensate DE/DM (BEC)
- Mikhail KATANAEV - geometric theory of defects
- Marek SZYDLOWSKI - whirlpool scenario
- Ivan DEBONO - weak lensing forecasts for DE, neutrinos and initial conditions
- Stefano CAMERA (Turino) - weak lensing in unified DM/DE models
- Boud ROUKEMA - Some spaces are more equal than others

main page: GrassmannCosmoFun2009

- inflaton difficult but not impossible to obtain
- T^4, topological mass term ...

- 90 new low z < 0.08 SNe Ia data from CfA
- OM fittings, SN+BAO vs SN+BAO+WMAP gives
- ArXiv:0903.5141
- OM behaviour at low z
- can be derived directly from H rather than dot(H)
- errors in OM smaller than for EOS
- OM not sensitive to Omega_m
- CPL parametrisation strains to fit low z and high z data simultaneously

- AstroPh:0403571
- boson field
- What is the boson? axion? neutrino pair condensation? new physics?
- if m = 1 eV, then BEC collapses to form objects of size l* approx 30(m/1eV)^2 kpc
- if BEC decays at z = 20, this gives about 20 kpc

- predicts stagflation which dissipatively reduces Lambda to zero

- edge dislocation - in elastic media - Burger's vector
- disclinations - in spin structures
- geometric model vs elasticity model

- flat model
- ArXiv:0906.0335
- 3D phase space trajectory matches different evolution stages of Universe, i.e. radiation, dust and accelerating epochs

- modelling of local cosmological parameters
- lensing can be useful
- need to: minimise "systematics in lensing", more accurate theoretical power spectrum calculation, combining different experiments is always better

- ArXiv:0902.4204
- would have some effect on weak lensing via a high l effect

- AstroPh:0602159 + ArXiv:0902.3402 (summary: ArXiv:0905.2543)

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Topic revision: r1 - 17 Sep 2009, BoudRoukema

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