Marco Baldi
Marco Baldi
Marco Baldi
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The first hydrodynamical high-resolution N-body simulations for a weak<br />
DE-CDM VARIABLE interaction: [<strong>Baldi</strong>, arXiv:1005.2188]<br />
M / crit<br />
10 5<br />
10 4<br />
10 3<br />
10 2<br />
10 1<br />
Tuesday, July 6, 2010<br />
CDM<br />
EXP010a2<br />
EXP015a3<br />
EXP010e2<br />
EXP010e3<br />
EXP015e3<br />
z = 0.00000<br />
Resuts (IV): halo density profiles<br />
Density profiles for Group nr. 6<br />
M200(CDM) = 1.44298e+14 h -1 M O•<br />
N=2x512 3<br />
L=80Mpc/h<br />
Hydro<br />
10 100 1000<br />
r [ h -1 kpc ]<br />
<strong>Marco</strong> <strong>Baldi</strong> - MGADS, Strasbourg 16 VI 2010<br />
DENSITY PROFILES<br />
The combination of the friction<br />
term and of the mass variation of<br />
(coupled) CDM particles affects<br />
the virial equilibrium of collapsed<br />
objects.... BUT:<br />
If the coupling grows in time,<br />
there is also a decrease of the<br />
gravitational potential energy of<br />
halos. Two effects are competing,<br />
and can determine both shallower<br />
and steeper density profiles<br />
depending on the existence of a<br />
“Growing ϕMDE” phase.
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