Welcome to the GSFC Exoplanet Modeling and Analysis Center (EMAC)

EMAC serves as a catalog, repository and integration platform for modeling and analysis resources focused on the study of exoplanet characteristics and environments. EMAC is a key project of the GSFC Sellers Exoplanet Environments Collaboration (SEEC).

If you make use of tools linked or hosted on EMAC: please use the following statement in your publication acknowledgements: “This research made use of the NASA Exoplanet Modeling and Analysis Center (EMAC), which is funded by the NASA Planetary Science Division’s Internal Scientist Funding Model.”

Stay up to date with EMAC!
  • Subscribe to our monthly RSS messages on new updates and tools
  • Check out the (unofficial) Twitter account @ExoplanetModels, where new tools and features are highlighted

  • Help us improve EMAC!
  • Visit our Feedback page or email us at and tell us what you’d change or improve
  • help us determine the best tools for new web interfaces by voting on our Vote page

  • More Information on EMAC for first-time visitor...       
    • EMAC is intended as a clearinghouse for the whole research community interested in exoplanets, where any software or model developer can submit their tool/model or their model output as a contribution for others to use.
    • EMAC provides a searchable and sortable database for available source code and data output files - both resources hosted locally by EMAC as well as existing external tools and repositories hosted elsewhere.
    • The EMAC team also helps develop new web interfaces for tools that can be run “on-demand” or model grids that can be interpolated for more individualized results.
    • If you would like to submit a new tool/model to EMAC, please visit Submit a Resource page.
    • For help with tutorials for select resources/tools use the “Demo” button below and subscribe to our YouTube channel.
    • Watch this video for a walk-through of the whole EMAC site, including how to submit a new tool and how to access information for each resource.

    The P.I. is Avi Mandell, and the Deputy P.I. is Eric Lopez; more information on EMAC staffing and organization will be posted shortly.

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    https://emac.gsfc.nasa.gov#6fdbe6b7-ea6c-4ad3-8c16-8cf4a5fa97ca
    ATMO Generic Grid @ ExoCTK: A Generic Model Grid of Planetary Transmission Spectra

    Jayesh Goyal et al.

    A generic model grid of planetary transmission spectra, scalable to a wide range of H2/He dominated atmospheres. The grid is computed using the 1D/2D atmosphere model ATMO for two different chemical scenarios, first considering local condensation only, secondly considering global condensation and removal of species from the atmospheric column (rainout). Using the model grid as a framework, we allow you to rescale your models with custom temperature, gravity, and radius values. The web interface is hosted and maintained by the STScI Exoplanet Characterization ToolKit.

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    https://emac.gsfc.nasa.gov#6fdbe6b7-ea6c-4ad3-8c16-8cf4a5fa97ca

    ATMO Generic Grid @ ExoCTK: A Generic Model Grid of Planetary Transmission Spectra

    Jayesh Goyal et al.

    A generic model grid of planetary transmission spectra, scalable to a wide range of H2/He dominated atmospheres. The grid is computed using the 1D/2D atmosphere model ATMO for two different chemical scenarios, first considering local condensation only, secondly considering global condensation and removal of species from the atmospheric column (rainout). Using the model grid as a framework, we allow you to rescale your models with custom temperature, gravity, and radius values. The web interface is hosted and maintained by the STScI Exoplanet Characterization ToolKit.

    ABOUT data-tooltip tabindex="1" title="View a video demonstration of the basic use of the tool" data-position="bottom" data-alignment="right">Demo
    data-tooltip tabindex="1" title="The number of times the paper associated with this tool has been cited on ADS, if applicable." data-position="bottom" data-alignment="right">ADS: 14 Reset data-tooltip tabindex="1" title="Open the tool's web application" data-position="bottom" data-alignment="right">WebApp
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    https://emac.gsfc.nasa.gov#8ef3e9d0-05a4-4e6a-ba0b-c0139b186676
    ATMO Exoplanet-Specific Grid: A Grid of Forward Model Transmission Spectra

    Jayesh Goyal et al.

    A grid of forward model transmission spectra, adopting an isothermal temperature-pressure profile, alongside corresponding equilibrium chemical abundances for 117 observationally significant hot exoplanets (equilibrium temperatures of 547–2710 K). This model grid has been developed using a 1D radiative–convective–chemical equilibrium model termed ATMO, with up-to-date high-temperature opacities.

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    https://emac.gsfc.nasa.gov#8ef3e9d0-05a4-4e6a-ba0b-c0139b186676

    ATMO Exoplanet-Specific Grid: A Grid of Forward Model Transmission Spectra

    Jayesh Goyal et al.

    A grid of forward model transmission spectra, adopting an isothermal temperature-pressure profile, alongside corresponding equilibrium chemical abundances for 117 observationally significant hot exoplanets (equilibrium temperatures of 547–2710 K). This model grid has been developed using a 1D radiative–convective–chemical equilibrium model termed ATMO, with up-to-date high-temperature opacities.

    ABOUT
    data-tooltip tabindex="1" title="The number of times the paper associated with this tool has been cited on ADS, if applicable." data-position="bottom" data-alignment="right">ADS: 5 data-tooltip tabindex="1" title="View and download the source code to run the tool locally" data-position="bottom" data-alignment="right">DOWNLOAD