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David Kirkby
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Cosmology
By
David Kirkby
Edited
May 30, 2024
1 fork
Importers
4 stars
Cosmology
CosmicExpansion
Curved Space
Cosmic Particles
Model Universes
Time and Distance in Cosmology
Observations: Fluxes and Angles
Cosmic window
CosmoCalc
CosmoViz
CosmoDev
Weak Lensing
DESI in 3D
Evolving Dark Energy
Massive Neutrinos
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Planck15
.
age
// in Gyr
Insert cell
(
1
-
Planck15
.
lookback_time
(
0
,
4n
)
/
Planck15
.
age
)
*
50
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Planck15
.
critical_density0
.
toString
(
)
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Planck15
.
Ode0
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Planck15
.
ngamma
(
0
)
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Planck15
.
ndm
(
0
,
0.1
)
*
1e6
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Planck15
.
ndm
(
0
)
/
Planck15
.
nb
(
0
)
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{
// z<0 corresponds to future times with negative comoving distances and lookback times.
const
z
=
linspace
(
-
0.5
,
2
,
11
,
{
dtype
:
Float64Array
}
)
;
return
Planck15
.
tidyz
(
z
,
'comoving_distance,lookback_time,critical_density,Ode'
)
;
}
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Planck15
.
_critical_density0
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w0wa
=
new
w0waCDM
(
{
H0
:
70
,
Om0
:
0.25
,
Ok0
:
0.1
,
w0
:
-
0.9
,
wa
:
0.1
,
Tcmb0
:
2.7
,
Neff
:
3.04
}
)
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w0wa
.
age
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// Om0=0.3, Ode0=0.7 age in Gyr
new
FluidsModel
(
0
,
0.3
,
0.7
,
70
)
.
age
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// Model without radiation has infinite horizon
new
FluidsModel
(
0
,
0.3
,
0.7
,
70
)
.
horizon
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// Or0=Om0=1 universe reaches max size at a=1.6
new
FluidsModel
(
1
,
1
,
0
,
70
)
.
aminmax
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// Ode0=1 universe reaches min size at a=0.7
new
FluidsModel
(
0
,
0
,
2
,
70
)
.
aminmax
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Planck15Params
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FLRW
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BaseModel
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Const
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