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(`AGSS09(a09p), Asplund et al. 2009 <https://ui.adsabs.harvard.edu/abs/2009ARA%26A..47..481A/abstract>`_),
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(`AAG21, Asplund et al. 2021 <https://ui.adsabs.harvard.edu/abs/2021A%26A...653A.141A/abstract>`_),
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and (`MB22, Magg et al. 2022 <https://doi.org/10.1051/0004-6361/202142971>`_). Users can
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adopt this new set of tables by selecting one of the following
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options for ``kap_file_prefix``:
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+
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+ ``'oplib_gs98'``
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+ ``'oplib_agss09'``
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+ ``'oplib_aag21'``
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+ ``'oplib_mb22'``
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+
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See :ref:`kap/overview:Overview of kap module` and
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:ref:`kap/defaults:kap_file_prefix` for more details on the
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implementation of these tables. For further details on these new OPLIB opacity tables, a direct comparison with
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the Type 1 OPAL/OP tables as well as their effect on solar models can be found in
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in Farag et al. 2024.
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+
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**Low Temperature Opacity Tables**
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Low temperature Rosseland-mean opacity tables for both (`AAG21, Asplund et al. 2021 <https://ui.adsabs.harvard.edu/abs/2021A%26A...653A.141A/abstract>`_),
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and (`MB22, Magg et al. 2022 <https://doi.org/10.1051/0004-6361/202142971>`_)
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solar-scaled abundance mixtures have been privately communicated by Jason Ferguson. These opacity tables were
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computed following the approach of `Ferguson et al. (2005) <https://ui.adsabs.harvard.edu/abs/2005ApJ...623..585F/abstract>`_. Users can
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adopt this new set of tables by selecting one of the following
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options for :ref:`kap/defaults:kap_lowT_prefix`:
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+
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+ ``'lowT_fa05_mb22'``
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+ ``'lowT_fa05_aag21'``
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**Opacity interpolation**
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MESA interpolates across opacity tables in the :math:`X–Z` plane through the use of two consequtive 1D splines.
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Previous versions of MESA have offered the users the ability to choose linear or cubic interpolation for these splines,
@@ -88,50 +128,6 @@ opacity of a model, and can directly effect the structure of solar models, see A
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We encourage users to experiment with these different opacity interpolation routines and be mindful of the effect they can have on their stellar models.
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`High Temperature Opacity Tables`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Type 1 Rosseland-mean opacity tables from The Los Alamos
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OPLIB database (`Colgan et al. 2016 <https://ui.adsabs.harvard.edu/abs/2016ApJ...817..116C/abstract>`_) are now available (Farag et al. 2024).
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These tables cover the region :math:`0.0\leq X \leq1-Z` and
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:math:`0.0\leq Z \leq0.2`. Each set of OPLIB
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opacity tables contains 1194 individual tables, a
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dramatic increase in table density (in the X--Z plane) over the standard
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126 individual tables provided in previous opacity releases. These tables
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are available for four solar-scaled abundance mixtures constructed from photospheric estimates of the solar heavy element abundance:
(`AGSS09(a09p), Asplund et al. 2009 <https://ui.adsabs.harvard.edu/abs/2009ARA%26A..47..481A/abstract>`_),
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(`AAG21, Asplund et al. 2021 <https://ui.adsabs.harvard.edu/abs/2021A%26A...653A.141A/abstract>`_),
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and (`MB22, Magg et al. 2022 <https://doi.org/10.1051/0004-6361/202142971>`_). Users can
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adopt this new set of tables by selecting one of the following
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options for ``kap_file_prefix``:
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+ ``'oplib_gs98'``
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+ ``'oplib_agss09'``
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+ ``'oplib_aag21'``
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+ ``'oplib_mb22'``
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-
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See :ref:`kap/overview:Overview of kap module` and
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:ref:`kap/defaults:kap_file_prefix` for more details on the
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implementation of these tables. For further details on these new OPLIB opacity tables, a direct comparison with
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the Type 1 OPAL/OP tables as well as their effect on solar models can be found in
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in Farag et al. 2024.
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`Low Temperature Opacity Tables`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Low temperature Rosseland-mean opacity tables for both (`AAG21, Asplund et al. 2021 <https://ui.adsabs.harvard.edu/abs/2021A%26A...653A.141A/abstract>`_),
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and (`MB22, Magg et al. 2022 <https://doi.org/10.1051/0004-6361/202142971>`_)
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solar-scaled abundance mixtures have been privately communicated by Jason Ferguson. These opacity tables were
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computed following the approach of `Ferguson et al. (2005) <https://ui.adsabs.harvard.edu/abs/2005ApJ...623..585F/abstract>`_. Users can
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adopt this new set of tables by selecting one of the following
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options for :ref:`kap/defaults:kap_lowT_prefix`:
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+ ``'lowT_fa05_mb22'``
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+ ``'lowT_fa05_aag21'``
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-
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Chem
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~~~~~
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New initial metal mass fractions ``initial_zfracs`` taken from photospheric estimates of the solar heavy element abundances in (AAG21, Asplund et al. 2021) and (MB22, Magg et al. 2022)
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