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.. _astropy-cosmology-realizations:
*******************************
Included Cosmology Realizations
*******************************
.. currentmodule:: astropy.cosmology.realizations
A number of preloaded cosmologies are available from analyses using the WMAP and
Planck satellite data. The full list of the predefined cosmologies is given by
``cosmology.realizations.available`` and summarized below:
=========== ============================== ==== ===== =======
Name Source H0 Om Flat
=========== ============================== ==== ===== =======
|WMAP1| Spergel et al. 2003 72.0 0.257 Yes
|WMAP3| Spergel et al. 2007 70.1 0.276 Yes
|WMAP5| Komatsu et al. 2009 70.2 0.277 Yes
|WMAP7| Komatsu et al. 2011 70.4 0.272 Yes
|WMAP9| Hinshaw et al. 2013 69.3 0.287 Yes
|Planck13| Planck Collab 2013, Paper XVI 67.8 0.307 Yes
|Planck15| Planck Collab 2015, Paper XIII 67.7 0.307 Yes
|Planck18| Planck Collab 2018, Paper VI 67.7 0.310 Yes
=========== ============================== ==== ===== =======
Currently, all are instances of |FlatLambdaCDM|. More details about exactly
where each set of parameters comes from are available in the docstring for each
object and described below::
>>> from astropy.cosmology import WMAP7
>>> print(WMAP7.__doc__)
WMAP7 instance of FlatLambdaCDM cosmology
(from Komatsu et al. 2011, ApJS, 192, 18, doi: 10.1088/0067-0049/192/2/18.
Table 1 (WMAP + BAO + H0 ML).)
.. _astropy_cosmology_realizations_Planck18:
Planck 2018
===========
The parameters are from Planck Collaboration (2020) Table 2 (TT, TE, EE
+ lowE + lensing + BAO) [P18]_.
.. note::
The Planck 2018 paper includes massive neutrinos in ``Om0`` but the Planck18
object includes them in ``m_nu`` instead for consistency. Hence, the ``Om0``
value in Planck18 differs slightly from the Planck 2018 paper but represents
the same cosmological model.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [P18] Planck Collaboration, et. al. (2020). Planck 2018 results. VI.
Cosmological parameters. Astronomy \& Astrophysics, 641, A6.
`<https://ui.adsabs.harvard.edu/abs/2020A%26A...641A...6P/abstract>`_
.. _astropy_cosmology_realizations_Planck15:
Planck 2015
===========
Parameters are from Planck Collaboration (2016) Paper XIII, Table 4 (TT, TE, EE + lowP + lensing + ext) [P15]_.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [P15] Planck Collaboration, et. al. (2016). Planck 2015 results. XIII.
Cosmological parameters. Astronomy \& Astrophysics, 594, A13.
`<https://ui.adsabs.harvard.edu/abs/2016A%26A...594A..13P/abstract>`_
.. _astropy_cosmology_realizations_Planck13:
Planck 2013
===========
Parameters are from Planck Collaboration (2014) Paper XVI, Table 5 (Planck + WP
+ highL + BAO) [P13]_.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [P13] Planck Collaboration, et. al. (2014). Planck 2013 results. XVI.
Cosmological parameters. Astronomy \& Astrophysics, 571, A16.
`<https://ui.adsabs.harvard.edu/abs/2014A%26A...571A..16P/abstract>`_
.. _astropy_cosmology_realizations_WMAP9:
WMAP 9 Year
===========
Parameters are from Hinshaw et al. (2013) Table 4 (WMAP9 + eCMB + BAO + H0) [WM9]_.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [WM9] Hinshaw, G., Larson, D., Komatsu, E., Spergel, D., Bennett, C.,
Dunkley, J., Nolta, M., Halpern, M., Hill, R., Odegard, N., Page, L., Smith,
K., Weiland, J., Gold, B., Jarosik, N., Kogut, A., Limon, M., Meyer, S.,
Tucker, G., Wollack, E., \& Wright, E. (2013). Nine-year Wilkinson Microwave
Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results. The
Astrophysical Journal Supplement, 208(2), 19.
`<https://ui.adsabs.harvard.edu/abs/2014A%26A...571A..16P/abstract>`_
.. _astropy_cosmology_realizations_WMAP7:
WMAP 7 Year
===========
Parameters are from Komatsu et al. (2011) Table 1 (WMAP + BAO + H0 ML) [WM7]_.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [WM7] Komatsu, E., Smith, K., Dunkley, J., Bennett, C., Gold, B., Hinshaw,
G., Jarosik, N., Larson, D., Nolta, M., Page, L., Spergel, D., Halpern, M.,
Hill, R., Kogut, A., Limon, M., Meyer, S., Odegard, N., Tucker, G., Weiland,
J., Wollack, E., \& Wright, E. (2011). Seven-year Wilkinson Microwave
Anisotropy Probe (WMAP) Observations: Cosmological Interpretation. The
Astrophysical Journal Supplement, 192(2), 18.
`<https://ui.adsabs.harvard.edu/abs/2011ApJS..192...18K/abstract>`_
.. _astropy_cosmology_realizations_WMAP5:
WMAP 5 Year
===========
Parameters are from Komatsu et al. (2009) Table 1 (WMAP + BAO + SN ML) [WM5]_.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [WM5] Komatsu, E., Dunkley, J., Nolta, M., Bennett, C., Gold, B., Hinshaw,
G., Jarosik, N., Larson, D., Limon, M., Page, L., Spergel, D., Halpern, M.,
Hill, R., Kogut, A., Meyer, S., Tucker, G., Weiland, J., Wollack, E., \&
Wright, E. (2009). Five-Year Wilkinson Microwave Anisotropy Probe
Observations: Cosmological Interpretation. The Astrophysical Journal
Supplement, 180(2), 330-376.
`<https://ui.adsabs.harvard.edu/abs/2009ApJS..180..330K/abstract>`_
.. _astropy_cosmology_realizations_WMAP3:
WMAP 3 Year
===========
Parameters are from Spergel et al. (2007) Table 6 (WMAP + SNGold) [WM3]_,
obtained from
https://lambda.gsfc.nasa.gov/product/map/dr2/params/lcdm_wmap_sngold.cfm.
``Tcmb0`` and ``Neff`` are the standard values as also used for |WMAP5|,
|WMAP7|, |WMAP9|.
.. note:: Pending WMAP team approval and subject to change.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [WM3] Spergel, D., Bean, R., Doré, O., Nolta, M., Bennett, C., Dunkley, J.,
Hinshaw, G., Jarosik, N., Komatsu, E., Page, L., Peiris, H., Verde, L.,
Halpern, M., Hill, R., Kogut, A., Limon, M., Meyer, S., Odegard, N., Tucker,
G., Weiland, J., Wollack, E., \& Wright, E. (2007). Three-Year Wilkinson
Microwave Anisotropy Probe (WMAP) Observations: Implications for Cosmology.
The Astrophysical Journal Supplement, 170(2), 377-408.
`<https://ui.adsabs.harvard.edu/abs/2007ApJS..170..377S/abstract>`_
.. _astropy_cosmology_realizations_WMAP1:
WMAP 1 Year
===========
Parameters are from Spergel et al. (2003) Table 7 (WMAP + CBI + ACBAR + 2dFGRS
+ Lya) [WM1]_. ``Tcmb0`` and ``Neff`` are the standard values as also used for
|WMAP5|, |WMAP7|, |WMAP9|.
.. note:: Pending WMAP team approval and subject to change.
Metadata
--------
========== =====================================
Oc0 Omega cold dark matter at z=0
n Density perturbation spectral index
sigma8 Density perturbation amplitude
tau Ionisation optical depth
z_reion Redshift of hydrogen reionisation
t0 Age of the universe in Gyr
reference Reference for the parameters
========== =====================================
References
----------
.. [WM1] Spergel, D., Verde, L., Peiris, H., Komatsu, E., Nolta, M., Bennett,
C., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., Limon, M., Meyer, S.,
Page, L., Tucker, G., Weiland, J., Wollack, E., \& Wright, E. (2003).
First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations:
Determination of Cosmological Parameters. The Astrophysical Journal
Supplement, 148(1), 175-194.
`<https://ui.adsabs.harvard.edu/abs/2003ApJS..148..175S/abstract>`_
Reference/API
=============
.. automodapi:: astropy.cosmology.realizations
:no-main-docstr:
:include-all-objects:
:inherited-members:
|
