Astrophysics Source Code Library

Here is a list of professional astrophysics codes. Many of the links below came from the Astrophysics Source Code Library (ASCL); the ASCL now has hundreds of codes and can be found here. The links below have been changed to reflect the new locations of the entries. See also

http://www.cfd-online.com/

http://www.astro-sim.org/

http://www-theorie.physik.unizh.ch/astrosim/code/doku.php

Accretion Disks
DUSTY - Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M.

XSTAR - A program for calculating conditions and spectra of photoionized gases Kallman, T.

Astrochemistry
CSENV: A code for the chemistry of CircumStellar ENVelopes Mamon, G. A. http://ascl.net/0104.002

Astrometry
StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

Astronomical Databases: Miscellaneous
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

Astrophysics general
AMUSE: Astronphysical Multipurpose Software Environment Portegies Zwart, S, et al. http://amusecode.org

Atomic Data
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

Atomic Processes
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

PopRatio: A program to calculate atomic level populations in astrophysical plasmas Silva, A. I. & Viegas, S. M. http://ascl.net/0202.001

Black Hole Physics
BHSKY: Visual distortions near a black hole Nemiroff, R. J. http://ascl.net/9910.006

Circumstellar Matter
CSENV: A code for the chemistry of CircumStellar ENVelopes Mamon, G. A. http://ascl.net/0104.002

Cosmic Microwave Background
COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

RADPACK: A RADical compression analysis PACKage for fitting to the CMB Knox, L. http://ascl.net/9910.009

CMBFAST: A microwave anisotropy code Seljak, U. & Zaldarriaga, M. http://ascl.net/9909.004

Icosahedron: The Icosahedron Package for Pixelizing the Sphere Tegmark, M. http://ascl.net/9905.002

Cosmology: Theory
COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

ANGSIZ: A general and practical method for calculating cosmological distances Helbig, P., Kayser, R., & Schramm, T. http://ascl.net/9909.002

PMcode: Particle-Mesh code for cosmological simulations Klypin, A. & Holtzman, J. http://ascl.net/9909.001

RADPACK: A RADical compression analysis PACKage for fitting to the CMB Knox, L. http://ascl.net/9910.009

CMBFAST: A microwave anisotropy code Seljak, U. & Zaldarriaga, M. http://ascl.net/9909.004

Cosmology: Large-Scale Structure of Universe
MLAPM: Simulating Structure Formation from Collisionless Matter Knebe, A., Green, A. & Binney, J. http://ascl.net/0104.001

Dark Matter
COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

PMcode: Particle-Mesh code for cosmological simulations Klypin, A. & Holtzman, J. http://ascl.net/9909.001

MLAPM: Simulating Structure Formation from Collisionless Matter Knebe, A., Green, A. & Binney, J. http://ascl.net/0104.001

CMBFAST: A microwave anisotropy code Seljak, U. & Zaldarriaga, M. http://ascl.net/9909.004

Distance Scale
ANGSIZ: A general and practical method for calculating cosmological distances Helbig, P., Kayser, R., & Schramm, T. http://ascl.net/9909.002

SLOPES: least-squares linear regression lines for bivariate datasets Feigelson, E. http://ascl.net/9906.001

Elementary Particles
COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

Elliptical
FASTELL: Fast calculation of a family of elliptical mass gravitational lens models Barkana, R. http://ascl.net/9910.003

Formation
MLAPM: Simulating Structure Formation from Collisionless Matter Knebe, A., Green, A. & Binney, J. http://ascl.net/0104.001

SPH_1D: Hierarchical gravity/SPH treecode for simulations of interacting galaxies Olson, K. http://ascl.net/9912.001

Halos
MLAPM: Simulating Structure Formation from Collisionless Matter Knebe, A., Green, A. & Binney, J. http://ascl.net/0104.001

Individual
FASTELL: Fast calculation of a family of elliptical mass gravitational lens models Barkana, R. http://ascl.net/9910.003

Interactions
SPH_1D: Hierarchical gravity/SPH treecode for simulations of interacting galaxies Olson, K. http://ascl.net/9912.001

Structure
FASTELL: Fast calculation of a family of elliptical mass gravitational lens models Barkana, R. http://ascl.net/9910.003

Content
BSGMODEL: The Bahcall-Soneira Galaxy Model Bahcall, J. N. http://ascl.net/9904.001

Structure
BSGMODEL: The Bahcall-Soneira Galaxy Model Bahcall, J. N. http://ascl.net/9904.001

EXTINCT: A Computerized Model of Large-Scale Visual Interstellar Extinction Hakkila, J., Myers, J. M., Stidman, B. J., Hartmann, D. H. http://ascl.net/9906.002

Bursts
WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

MILLISEARCH: A Search for Millilensing in BATSE GRB Data Nemiroff, Robert J. http://ascl.net/0101.001

BLOCK: A Bayesian block method to analyze structure in photon counting data Scargle, J. D. http://ascl.net/9909.005 This code is obsolete and yields approximate results; see Bayesian Blocks instead for an algorithm guaranteeing exact global optimization.

Observations
WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Gravitation
NBODY family of codes: Numerical Simulations of Many-body (N-body) Gravitational Interactions Aarseth, S. http://ascl.net/1102.006

COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

GADGET: A code for cosmological simulations of structure formation Springel, V. & Yoshida, N. http://ascl.net/0003.001

Gravitational Lensing
FASTELL: Fast calculation of a family of elliptical mass gravitational lens models Barkana, R. http://ascl.net/9910.003

ANGSIZ: A general and practical method for calculating cosmological distances Helbig, P., Kayser, R., & Schramm, T. http://ascl.net/9909.002

MILLISEARCH: A Search for Millilensing in BATSE GRB Data Nemiroff, Robert J. http://ascl.net/0101.001

BHSKY: Visual distortions near a black hole Nemiroff, R. J. http://ascl.net/9910.006

LENSKY: Galactic Microlensing Probability Nemiroff, R. J. http://ascl.net/LENSKY

Hydrodynamics
GADGET: A code for cosmological simulations of structure formation Springel, V. & Yoshida, N. http://ascl.net/0003.001

Pencil Code: A high-order code, especially for hydromagnetic turbulence; http://pencil-code.googlecode.com/

Adaptive Optics
StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

Detectors
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Interferometric
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

Photometers
IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

Spectrographs
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

RVSAO: Digital redshifts and radial velocities Kurtz, M. J. & Mink, D. J. http://ascl.net/9912.003

Abundances
CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

Atoms
CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

Dust
DDSCAT: The Discrete Dipole approximation for Scattering and absorption of light by irregular particles Draine, B. T. & Flatau, Piotr J. http://ascl.net/0008.001

EXTINCT: A Computerized Model of Large-Scale Visual Interstellar Extinction Hakkila, J., Myers, J. M., Stidman, B. J., Hartmann, D. H. http://ascl.net/9906.002

DUSTY: Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M. http://ascl.net/9911.001

Extinction
DDSCAT: The Discrete Dipole approximation for Scattering and absorption of light by irregular particles Draine, B. T. & Flatau, Piotr J. http://ascl.net/0008.001

EXTINCT: A Computerized Model of Large-Scale Visual Interstellar Extinction Hakkila, J., Myers, J. M., Stidman, B. J., Hartmann, D. H. http://ascl.net/9906.002

DUSTY: Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M. http://ascl.net/9911.001

Molecules
RATRAN: Radiative transfer and molecular excitation in one and two dimensions Hogerheijde, Michiel & van der Tak, Floris http://ascl.net/RATRAN

CSENV: A code for the chemistry of CircumStellar ENVelopes Mamon, G. A. http://ascl.net/0104.002

Large-Scale Structure Of The Universe
COSMICS: Cosmological initial conditions and microwave anisotropy codes Bertschinger, E. http://ascl.net/9910.004

PMcode: Particle-Mesh code for cosmological simulations Klypin, A. & Holtzman, J. http://ascl.net/9909.001

CMBFAST: A microwave anisotropy code Seljak, U. & Zaldarriaga, M. http://ascl.net/9909.004

Formation
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

RATRAN: Radiative transfer and molecular excitation in one and two dimensions Hogerheijde, Michiel & van der Tak, Floris http://ascl.net/RATRAN

XSTAR: A program for calculating conditions and spectra of photoionized gases Kallman, T. http://ascl.net/9910.008

PopRatio: A program to calculate atomic level populations in astrophysical plasmas Silva, A. I. & Viegas, S. M. http://ascl.net/0202.001

Identification
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Data Analysis
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

ISIS: A method for optimal image subtraction Alard, C. & Lupton, R. http://ascl.net/9909.003

XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

SLOPES: least-squares linear regression lines for bivariate datasets Feigelson, E. http://ascl.net/9906.001

FTOOLS: A general package of software to manipulate FITS files FTOOLS Team http://ascl.net/9912.002

IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

RVSAO: Digital redshifts and radial velocities Kurtz, M. J. & Mink, D. J. http://ascl.net/9912.003

MILLISEARCH: A Search for Millilensing in BATSE GRB Data Nemiroff, Robert J. http://ascl.net/0101.001

BLOCK: A Bayesian block method to analyze structure in photon counting data Scargle, J. D. http://ascl.net/9909.005 This code is obsolete and yields approximate results; see Bayesian Blocks instead for an algorithm guaranteeing exact global optimization.

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Icosahedron: The Icosahedron Package for Pixelizing the Sphere Tegmark, M. http://ascl.net/9905.002

SAOimage: A utility for displaying astronomical images in the X11 window environment VanHilst, M. & Mink, D. http://ascl.net/0003.002

N-Body Simulations
NBODY family of codes for numerical simulations of many-body (N-body) gravitational interactions Aarseth, S. http://ascl.net/1102.00

GADGET: A code for cosmological simulations of structure formation Springel, V. & Yoshida, N. http://ascl.net/0003.001

Numerical
RATRAN: Radiative transfer and molecular excitation in one and two dimensions Hogerheijde, Michiel & van der Tak, Floris http://ascl.net/RATRAN

SPH_1D: Hierarchical gravity/SPH treecode for simulations of interacting galaxies Olson, K. http://ascl.net/9912.001

BLOCK: A Bayesian block method to analyze structure in photon counting data Scargle, J. D. http://ascl.net/9909.005 This code is obsolete and yields approximate results; see Bayesian Blocks instead for an algorithm guaranteeing exact global optimization.

Statistical
ISIS: A method for optimal image subtraction Alard, C. & Lupton, R. http://ascl.net/9909.003

SLOPES: least-squares linear regression lines for bivariate datasets Feigelson, E. http://ascl.net/9906.001

RADPACK: A RADical compression analysis PACKage for fitting to the CMB Knox, L. http://ascl.net/9910.009

BLOCK: A Bayesian block method to analyze structure in photon counting data Scargle, J. D. http://ascl.net/9909.005 This code is obsolete and yields approximate results; see Bayesian Blocks instead for an algorithm guaranteeing exact global optimization.

SLstats: Statistics module for the S-Lang interpreter Davis, J. E. http://space.mit.edu/cxc/software/slang/modules/stats/

Plasmas
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

XSTAR: A program for calculating conditions and spectra of photoionized gases Kallman, T. http://ascl.net/9910.008

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

PopRatio: A program to calculate atomic level populations in astrophysical plasmas Silva, A. I. & Viegas, S. M. http://ascl.net/0202.001

Radiation Mechanisms: Non-Thermal
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Radiation Mechanisms: Thermal
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

XSTAR: A program for calculating conditions and spectra of photoionized gases Kallman, T. http://ascl.net/9910.008

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Radiative Transfer
DDSCAT: The Discrete Dipole approximation for Scattering and absorption of light by irregular particles Draine, B. T. & Flatau, Piotr J. http://ascl.net/0008.001

CLOUDY: Numerical simulation of plasmas and their spectra Ferland, G. et al. http://ascl.net/9910.001

RATRAN: Radiative transfer and molecular excitation in one and two dimensions Hogerheijde, Michiel & van der Tak, Floris http://ascl.net/RATRAN

DUSTY: Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M. http://ascl.net/9911.001

Radio Continuum: General
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

Radio Lines: General
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

Relativity
BHSKY: Visual distortions near a black hole Nemiroff, R. J. http://ascl.net/9910.006

Scattering
DDSCAT: The Discrete Dipole approximation for Scattering and absorption of light by irregular particles Draine, B. T. & Flatau, Piotr J. http://ascl.net/0008.001

Abundances
SPECTRUM: A stellar spectral synthesis program Gray, R. O. http://ascl.net/9910.002

Atmospheres
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

SPECTRUM: A stellar spectral synthesis program Gray, R. O. http://ascl.net/9910.002

Circumstellar Matter
DUSTY: Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M. http://ascl.net/9911.001

Fundamental Parameters
SPECTRUM: A stellar spectral synthesis program Gray, R. O. http://ascl.net/9910.002

General
CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

Imaging
StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

Individual
SPECTRUM: A stellar spectral synthesis program Gray, R. O. http://ascl.net/9910.002

Pre-Main-Sequence
DUSTY: Radiation transport in a dusty environment Ivezic, Z., Nenkova, M., & Elitzur, M. http://ascl.net/9911.001

Variables
CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

Atmosphere
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

Gamma-Rays
WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Surveys
CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

Image Processing
ISIS: A method for optimal image subtraction Alard, C. & Lupton, R. http://ascl.net/9909.003

StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

FTOOLS: A general package of software to manipulate FITS files FTOOLS Team http://ascl.net/9912.002

Interferometric
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

Photometric
StarFinder: A code for stellar field analysis Diolaiti, E. et al. http://ascl.net/0011.001

IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

SAOimage: A utility for displaying astronomical images in the X11 window environment VanHilst, M. & Mink, D. http://ascl.net/0003.002

Radial Velocities
RVSAO: Digital redshifts and radial velocities Kurtz, M. J. & Mink, D. J. http://ascl.net/9912.003

Radar Astronomy
AIPS: Astronomical Image Processing System AIPS Team http://ascl.net/9911.003

Spectroscopic
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

SPECTRUM: A stellar spectral synthesis program Gray, R. O. http://ascl.net/9910.002

IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

RVSAO: Digital redshifts and radial velocities Kurtz, M. J. & Mink, D. J. http://ascl.net/9912.003

WINGSPAN: A WINdows Gamma-ray SPectral Analysis program Preece, R. D., Briggs, M. S., Mallozzi R. S., & Brock, M. N. http://ascl.net/9910.007

Telescopes
CONSKY: Sky CCD Integration Simulation Nemiroff, R. J. & Rafert, J. B. http://ascl.net/9905.001

Ultraviolet: General
CHIANTI: A database for astrophysical emission line spectroscopy CHIANTI Consortium http://ascl.net/9911.004

IRAF: Image Reduction and Analysis Facility IRAF Team http://ascl.net/9911.002

SAOimage: A utility for displaying astronomical images in the X11 window environment VanHilst, M. & Mink, D. http://ascl.net/0003.002

General
XSPEC: An X-ray spectral fitting package Arnaud, K., Shafer, R., Haberl, F. & Tennant, A. http://ascl.net/9910.005

ISIS - A programmable data analysis environment, similar to IDL or matlab, with a strong emphasis on X-ray spectral analysis.

FTOOLS: A general package of software to manipulate FITS files FTOOLS Team http://ascl.net/9912.002

XSTAR: A program for calculating conditions and spectra of photoionized gases Kallman, T. http://ascl.net/9910.008

Stars
XSTAR: A program for calculating conditions and spectra of photoionized gases Kallman, T. http://ascl.net/9910.008