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

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

Galaxies

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/

Instrumentation

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

ISM

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

Line

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

Stars

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

Techniques

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

X-Rays

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