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The SKIRT project
advanced radiative transfer for astrophysics
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The SKIRT project
advanced radiative transfer for astrophysics
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The tables below list the most relevant recent updates to SKIRT and PTS since version 9 was publicly released on May 10, 2019. In case a change comprises multiple commits, the date and commit hash in the table indicate the most recent commit that includes all the changes implied by the corresponding description. For details, refer to the commit history and pull requests in the respective GitHub repositories.
| Date | Commit | Description |
|---|---|---|
| Aug 14, 2019 | dadfa2d | Various minor corrections to Q&A messages and default values |
| Aug 22, 2019 | a1f2ce4 | Support column reordering for importing snapshots |
| Aug 23, 2019 | c7a14c2 | Various minor performance optimizations |
| Sep 17, 2019 | 3799dd5 | Add probes for radiation field and dust emission wavelength grid |
| Oct 11, 2019 | 1d790e8 | Add SED families generated by the stellar population synthesis code FSPS |
| Oct 21, 2019 | 7d3db33 | Add probes for planar cuts at arbitrary positions in the model |
| Oct 21, 2019 | 9c40ce6 | Support velocity dispersion for imported sources |
| Oct 29, 2019 | fda5749 | Use hydrid parallellization for building Voronoi grids |
| Jan 17, 2020 | 8b4920a | Introduce a set of basic vector fields, including decorators |
| Jan 17, 2020 | 8b4920a | Add magnetic fields to geometric and imported media, including probes |
| Jan 17, 2020 | 8b4920a | Add velocity fields to geometric sources and media, including probes |
| Jan 28, 2020 | d9c0c65 | Add SEDs to model Lyman-alpha sources |
| Feb 20, 2020 | d2af8ae | Add minimum radius to Sphere1DSpatialGrid |
| Mar 19, 2020 | 767fb95 | Allow placing models at nonzero redshift |
| Mar 19, 2020 | 767fb95 | Support dust heating by the CMB radiation |
| Mar 19, 2020 | 767fb95 | DistantInstrument subclasses output the extent of the spatial axes in angular units |
| Apr 20, 2020 | 69b5c6e | Fix bug in optimization of instruments with the same line of sight |
| May 11, 2020 | 247b3fb | Remove the carbon emission lines from the MappingsSEDFamily dust continuum |
| Jun 10, 2020 | efcaaee | Add Lyman-alpha photon cycle and import capabilities |
| Jun 17, 2020 | 2fb8543 | Add HEALPixSkyInstrument |
| Jul 16, 2020 | 58c16ec | Repeat warnings and non-fatal errors at the end of the simulation log |
| Jul 29, 2020 | 9db9d51 | Add polarised secondary emission for aligned dust grains |
| Aug 4, 2020 | b1ccc21 | Add snapshot import from list of cuboidal cells (as alternative for AMR) |
| Aug 20, 2020 | 3503470 | Allow assigning a user-provided SED to each individual imported source |
| Nov 2, 2020 | 086772b | Substantial update to make material mix and medium state code more generic |
| Nov 2, 2020 | 086772b | Add a decorator to split a dust mix into material type and/or size bin fragments |
| Nov 2, 2020 | 086772b | Allow distinct density values to be imported from a snapshot for each fragment |
| Nov 2, 2020 | 086772b | Allow dynamically adjusting the medium state by iterating over the primary radiation field |
| Nov 2, 2020 | 086772b | Add a basic dust destruction recipe using the dynamic medium state mechanism |
| Nov 2, 2020 | 086772b | Add probes to output the values of custom state variables such as destruction fractions |
| Nov 2, 2020 | 086772b | Add the option to use a photon cycle without forced scattering, mainly for Lyman-alpha |
| Nov 2, 2020 | 086772b | Allow loading a dust grain size distribution from file or configuring it as a list |
| Nov 2, 2020 | 086772b | The spheroidal dust grain compositions now offer built-in property tables |
| Nov 9, 2020 | 787d31a | Add geometry that reads density distribution from a 3D FITS data cube |
| Nov 13, 2020 | 46f0313 | Fix the (tiny) asymmetry in Lyman-alpha SEDs for static spheres |
| Feb 19, 2021 | 04f69bd | Fix surface brightness calibration and coordinate transforms for "local" instruments |
| Feb 19, 2021 | 2c0a6a1 | Introduce line emission spectra for normalized sources |
| Feb 23, 2021 | d9ef94a | Add circular aperture to SEDInstrument |
| Mar 3, 2021 | 9c80c88 | Add BPASS SED template family with optional resource pack |
| Mar 16, 2021 | bf69f1b | Add optional ionization parameter to FileSSPSEDFamily to support nebular emission |
| Mar 29, 2021 | aecef86 | Allow avoiding Voronoi tessellation construction for imported density distributions |
| Mar 30, 2021 | c2a0f31 | Add a probe for the radiation field at the positions listed in a user-provided input file |
| Apr 26, 2021 | c70b6ef | Upgrade to recent cfitsio library version that properly runs on Apple Silicon |
| Jun 9, 2021 | b37c225 | Upgrade to recent Voro++ library version and retry construction after removing invalid cells |
| Jun 9, 2021 | b37c225 | Stop Intel compilers from using optimizations that cause non-standard floating point operation |
| Jun 9, 2021 | a3abee9 | Support binary stored columns format as faster alternative for column text files |
| Sep 16, 2021 | fc46ce7 | Fix incorrect treatment of photon packets originating outside of Cylinder2DSpatialGrid |
| Sep 16, 2021 | 2633935 | Add probe to output projected surface density (dust) or column density (electrons, gas) |
| Dec 1, 2021 | 3133494 | ** Enable emission from gas media and streamline execution flow and configuration options |
| Dec 6, 2021 | 5451916 | Support counts per energy units (e.g. 1/s/keV) and 'wavelength' output as energy (e.g. keV) |
| Dec 9, 2021 | 99109f7 | Add broadband definitions for the Euclid and Rubin/LSST observatories |
| Dec 10, 2021 | 3a210a8 | Add new wavelengths grid types (specify spectral resolution; specify outer bin borders) |
| Dec 16, 2021 | e0367b6 | Add Compton scattering and velocity dispersion for electron populations |
| Dec 16, 2021 | e0367b6 | Fix a bug in velocity dispersion sampling for imported sources |
| Dec 17, 2021 | 06cfaac | Add 21 cm hydrogen 'spin-flip' line emission and self-absorption |
| Jan 4, 2022 | 4a9adf8 | Add composite wavelength grid defined by aggregating a list of wavelength grids |
| Jan 24, 2022 | a313a94 | Instruments output transparent flux from secondary sources (extra column in SED output files) |
| Jan 28, 2022 | 681a39a | Add power-law behavior to radial and rotational vector fields |
| Feb 15, 2022 | 322f530 | Allow multiple media components to change the wavelength during scattering |
| Feb 16, 2022 | 9b73b93 | Fix random position generation in Torus, Shell, and ConicalShell geometries for exponents p>=3 |
| Feb 24, 2022 | ca5ff94 | Add photo-absorption and fluorescence by neutral atomic gas at X-ray wavelengths |
| Mar 3, 2022 | 4222613 | Add "hollow" radial vector field with power-law behavior and central cavity |
| Mar 10, 2022 | d21d1b2 | Include information on secondary emission in LaunchedPacketsProbe |
| Mar 22, 2022 | 5e3effa | Add workaround for extreme forward scattering by dust in the X-ray regime |
| Apr 4, 2022 | 86ac8bf | Adjust MeanInterstellarDustMix scattering asymmetry parameter for X-ray wavelengths |
| May 18, 2022 | 48f28ee | ** Substantially revised and augmented probes based on new design with probe forms |
| May 18, 2022 | 48f28ee | ParticleMedium can read volume-integrated number as an alternative to volume-integrated mass |
| Jun 9, 2022 | 5afa2a8 | Add scattering by bound electrons to X-ray atomic gas (four implementations) |
| Jun 9, 2022 | 5afa2a8 | Introduce explicit absorption to support stimulated emission (negative extinction) |
| Jun 22, 2022 | ff684b0 | Allow source/medium-colocated clumps in clumpy geometry decorator |
| Aug 2, 2022 | c0b019d | Imported source probes always use system aggregation |
| Aug 3, 2022 | 4540d38 | Support convolution over broadbands in imported source luminosity probe |
| Aug 3, 2022 | 0f9447f | Allow probing after each iteration over primary or secondary emission |
| Aug 9, 2022 | 4dbf6f3 | ** Revised dynamic medium state concepts and execution flows |
| Sep 15, 2022 | cfc43be | ** Extra flexibility for border wavelength grids loaded from file or list |
| Sep 19, 2022 | 2c337c4 | Support self-consistent non-LTE line transfer for selected transitions and species |
| Oct 12, 2022 | fbd00c8 | Add probe for line luminosity during secondary emission |
| Nov 4, 2022 | edb826e | Fix multi-process hang in imaging form probes |
| Jan 23, 2023 | 6b8531e | Add annulus and donut geometries |
| Apr 11, 2023 | 930a240 | Add extra fluorescent lines to XRayAtomicGasMix |
| Apr 29, 2023 | 352bd26 | Support polarization for Compton scattering in ElectronMix and XRayAtomicGasMix |
| May 19, 2023 | cbcac09 | Add three new GrainCompositions for AGN dusty torus |
| Jun 7, 2023 | 1bba242 | Add TODDLERS star-forming region SED template library |
| Jun 8, 2023 | 587faab | Add temperature probing for individual grain populations in a dust mixture |
| Aug 23, 2023 | 9e2c223 | Support hydroxyl with hyperfine structure and molecular hydrogen for non-LTE line transfer |
| Aug 26, 2023 | 7d463e3 | Fix performance issue in photon life cycle without forced scattering |
| Aug 30, 2023 | 879e9de | Introduce extrapolated optical properties for AGN dust mixes |
| Sep 20, 2023 | 2609fd3 | Honor wavelength output style for spectral units in ski files, Q&A, and Makeup |
| Oct 4, 2023 | 6f61d94 | Add Nested Density Tree Policy |
| Oct 6, 2023 | 21bd407 | Add option for oversampling to ParallelProjectionForm |
| Oct 20, 2023 | 0555100 | Add convergence criterion to NonLTELineGasMix using global level populations |
| Oct 20, 2023 | 9c171a4 | Add density and opacity probing for individual grain populations in a dust mixture |
| Oct 21, 2023 | 1288661 | Update atomic/molecular partitioning scheme in SpinFlipHydrogenGasMix |
| Oct 21, 2023 | 1288661 | Add separate SpinFlip emission/absorption classes |
| Nov 9, 2023 | 8cd4722 | Add power law redistribute geometry decorator classes |
| Nov 23, 2023 | e790b9f | Add probe for dust luminosity spectrum during secondary emission |
| Feb 19, 2024 | 0fced48 | Allow negative exponent for ShellGeometry |
| Feb 28, 2024 | 2191a4e | Add a polarized point source using user-tabulated emission properties |
| Mar 7, 2024 | 3c9e4d7 | Add observer angles and distance to output of distant instruments |
| Mar 24, 2024 | 935d7ea | Support ExtraBands resource pack with HST and JWST filters |
| Jun 7, 2024 | c991294 | Add intrinsic line shapes for key fluorescent lines in XRayAtomicGasMix |
| Sep 2, 2024 | d3343d6 | Add Hirashita (2015) grain size distribution |
| Oct 11, 2024 | 8765014 | Properly calculate photon energy loss for bound-electron Compton scattering in X-ray gas |
| Dec 20, 2024 | 81d2eda | Add Tetrahedral spatial grid |
| Jan 10, 2025 | 6bafd69 | Allow importing a per-particle source bias weight to reduce noise in low-luminosity regions |
| Jan 22, 2025 | 828c3d1 | Support importing from snapshots in cylindrical coordinates |
| Feb 3, 2025 | 1726ed2 | ** Add 3D spatial grids in cylindrical and spherical coordinates; add symmetric log mesh |
| Feb 17, 2025 | ba2f74c | Support importing from snapshots in spherical coordinates |
| Mar 6, 2025 | 56c2a10 | Add automatic column order and virtual zero columns for import text column files |
| Mar 11, 2025 | dcb3392 | Add quartic spline smoothing kernel |
** This update requires a ski file upgrade
| Date | Commit | Description |
|---|---|---|
| Jun 20, 2019 | 716613d | Command script 'plot_seds' allows specifying an instrument name |
| Aug 13, 2019 | c839f74 | Add MovieFile class based on ffmpeg |
| Aug 13, 2019 | c839f74 | Provide facilities for making "wavelength movies" |
| Aug 22, 2019 | eae0e63 | Add optional title and format to saveColumns() function |
| Oct 3, 2019 | a5767f0 | Provide framework for upgrading SKIRT 9 ski files (not needed yet) |
| Oct 11, 2019 | 50de868 | Support conversion from FSPS output to SKIRT stored table format |
| Oct 15, 2019 | 01cd541 | Add facilities for plotting the spectral resolution of a wavelength grid |
| Oct 21, 2019 | 70b262f | Support plotting the new planar cuts at arbitrary positions in the model |
| Jan 17, 2020 | b60c3d8 | Allow plotting magnetic field and velocity cuts produced by the respective probes |
| May 11, 2020 | 021456b | Remove the carbon emission lines from the Mappings dust continuum |
| Jul 8, 2020 | 8de8b34 | Add script to convert HEALPixSkyInstrument output to a projected image |
| Dec 10, 2020 | 4caec70 | Add conversion to SKIRT stab format for BPASS stellar population models |
| Feb 19, 2021 | 55e86db | Update script to convert HEALPixSkyInstrument output to a projected image |
| Feb 19, 2021 | 35684ec | Augment automated ski file upgrade procedure for line SEDs |
| Mar 16, 2021 | 9631f87 | Add example script for creating FSPS templates with nebular emission |
| Jun 9, 2021 | 1e09625 | Support creating and reading files in the SKIRT-specific stored columns format |
| Nov 30, 2021 | 8bcfe7f | Provide automated ski file upgrade procedure for tomorrow's SKIRT update |
| Dec 6, 2021 | 649cd1e | Support counts per energy units (e.g. 1/s/keV) and wavelength output style (e.g. keV) |
| Dec 9, 2021 | a50ebfd | Add broadband definitions for the Euclid and Rubin/LSST observatories |
| Jan 4, 2022 | 93b3eca | Allow plotting spectral resolution from any instrument or probe output with a wavelength grid |
| Apr 4, 2022 | b24c59c | Adjust MeanInterstellarDustMix scattering asymmetry parameter for X-ray wavelengths |
| May 18, 2022 | f5b3f85 | Adjust plotting commands and ski file upgrade to revised probes and probe forms |
| Aug 9, 2022 | 49f8d7d | Provide automated ski file upgrade procedure for revised execution flows |
| Sep 15, 2022 | 06777ab | Provide automated ski file upgrade procedure for border wavelength grids |
| Nov 4, 2022 | 5937da0 | Fix some very minor issues, mostly documentation |
| Sep 14, 2023 | 2583d55 | Allow specifying the units of the wavelength range in relevant plot commands |
| Jun 6, 2024 | 9864d2e | Built-in broadband definitions are now taken from SKIRT resources |
| Feb 3, 2025 | f6a2431 | Provide automated ski file upgrade procedure for today's SKIRT update (grids and meshes) |
| Mar 2, 2025 | cd3c129 | Add function to write FITS file in SKIRT output style |