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!
  • Email us with general feedback at and tell us what you’d change or improve.
  • Click the icon in a resource box to provide suggestions for an individual tool or tools.

  • 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?related_resource=c9539dbb-fd84-4eeb-8606-3cb2440edffb
    ATMO: 1D-2D radiative/convective atmospheric code

    Tremblin P. et al. (see description)

    ATMO is a 1D-2D atmospheric code for the study of the atmosphere of brown dwarfs and exoplanets. The code has originally been developed at the University of Exeter (here) and is currently a collaboration between different groups across the globe. The main developers are: 1D and 2D newton solver: P. Tremblin Radiative transfer: D. Amundsen, P. Tremblin Opacities: D. Amundsen, M. Phillips, R. Ridgway, J. Goyal Equilibrium chemistry: P. Tremblin, B. Drummond, J. Goyal Condensation and rainouts: P. Tremblin, J. Goyal Out-of-equilibrium chemistry: O. Venot, E. Hebrard, B. Drummond Convection: P. Tremblin, M. Phillips Retrieval: D. Sing

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    https://emac.gsfc.nasa.gov#?related_resource=c9539dbb-fd84-4eeb-8606-3cb2440edffb

    ATMO: 1D-2D radiative/convective atmospheric code

    Tremblin P. et al. (see description)

    ATMO is a 1D-2D atmospheric code for the study of the atmosphere of brown dwarfs and exoplanets. The code has originally been developed at the University of Exeter (here) and is currently a collaboration between different groups across the globe. The main developers are: 1D and 2D newton solver: P. Tremblin Radiative transfer: D. Amundsen, P. Tremblin Opacities: D. Amundsen, M. Phillips, R. Ridgway, J. Goyal Equilibrium chemistry: P. Tremblin, B. Drummond, J. Goyal Condensation and rainouts: P. Tremblin, J. Goyal Out-of-equilibrium chemistry: O. Venot, E. Hebrard, B. Drummond Convection: P. Tremblin, M. Phillips Retrieval: D. Sing

    About
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    https://emac.gsfc.nasa.gov?related_resource=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#?related_resource=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 Demo
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    https://emac.gsfc.nasa.gov?related_resource=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#?related_resource=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