Cosmology Tools
Browse all available cosmology tools.
Available tools
- Angular Bin Solid Angle Weight Tool Compute a spherical angular-bin solid angle from explicit cosine-polar bounds and azimuth width.
- Angular Comoving Scale Factor Tool Apply the small-angle transverse comoving relation using an explicitly supplied distance.
- Baryon Density Physical Parameter Crosswalk Tool Calculate baryon density physical parameter crosswalk from explicit caller-supplied inputs.
- Baryon Fraction Density Parameter Ratio Divide supplied baryon by total matter density parameters on the same epoch and normalization basis.
- CMB Bandpower Ell Weight Calculate D_l=l(l+1)C_l/(2 pi) from an explicit multipole and supplied C_l without beam, mask or noise correction.
- CMB Temperature Redshift Ratio Tool Calculate cmb temperature redshift ratio from explicit caller-supplied inputs.
- Comoving Bin Volume Share Tool Share of already supplied compatible comoving volumes; no distance-redshift cosmology is inferred.
- Comoving Physical Length Redshift Factor Tool Calculate comoving physical length redshift factor from explicit caller-supplied inputs.
- Comoving Volume H Cubed Unit Pair Convert a supplied comoving volume carrying h^-3 to the corresponding base cubic unit with explicit positive h.
- Comoving Volume Solid Angle One Shell Term Tool Differential thin comoving shell DM squared*dDC*dOmega, without treating a thick curved shell as a Euclidean frustum.
- Cosmic Scale Factor Reference Gap Tool Convert a supplied redshift using an explicit scale-factor normalization; no cosmological parameters or distances.
- Cosmological Angle Radian Basis Token Tool Convert a supplied angle with its explicit source-unit factor; no angular-diameter distance is inferred.
- Cosmological Dimming Surface Brightness Factor Tool Bolometric Tolman surface-brightness dimming, excluding bandpass K correction and source evolution.
- Cosmological H Scaled Mass Crosswalk Apply an explicit h exponent to a quoted cosmological mass, making the scaling convention caller-supplied rather than inferred from notation.
- Cosmological Lookback Time Local Increment Tool Local differential dtLookback=dz/[(1+z)*H(z)], rather than a finite-redshift integration.
- Cosmological Redshift Peculiar Log Factor Split Tool Compose redshift factors multiplicatively rather than adding redshifts; no peculiar-velocity approximation is applied.
- Cosmological Simulation Snapshot Scale Tag Label an explicitly supplied simulation snapshot scale factor and corresponding cosmological redshift.
- Cosmological Time Dilation Interval Pair Apply cosmological observed-to-rest interval factor 1+z using an explicit redshift greater than minus one.
- Cosmological Wavenumber Hunit Crosswalk Tool Convert a quoted k in h/Mpc to 1/Mpc; wavelength uses 2*pi/k and is quoted in Mpc/h.
- Cosmology Density Closure Residual Compare explicitly supplied density-parameter components with an explicit closure target, allowing signed curvature components.
- Cosmology Distance Physical Comoving Label Crosswalk an explicit same-epoch physical/comoving separation using a positive scale factor without confusing luminosity or angular-diameter distances.
- Cosmology Likelihood Bin Residual Standardize one supplied cosmology bin residual by an explicit positive uncertainty without assuming independent bins or forming a likelihood.
- Critical Density Hubble Squared Factor Tool Critical density 3H squared/(8*pi*G); H must be in inverse seconds when G is SI.
- Curvature Density Redshift Square Term Tool Signed curvature contribution to a dimensionless Friedmann expansion function; this is not a material energy density.
- Dark Energy Constant W Density Factor Tool Constant equation-of-state fluid with no interaction term; w=-1 gives constant density.
- Distance Modulus Hubble Rescale Term Tool Hold dimensionless expansion history and observed redshift fixed while distances scale inversely with H0.
- Flux Luminosity Reference Ratio Tool Compare isotropic luminosities using supplied luminosity distances and compatible flux units.
- Galaxy Redshift Bin Rest Frame Width Tool Normalize a small observed redshift interval by 1+z; this is not a full relativistic velocity-width conversion.
- Hubble Distance Hunit Factor Tool Hubble-distance unit arithmetic from an explicitly supplied conversion, not a distance-redshift integral.
- Hubble Time Gigayear Supplied Unit Factor Tool Inverse Hubble rate with caller-supplied unit conversion factors, not the age of a specified cosmological model.
- Lensing Convergence Shear Magnification Term Tool Local signed gravitational-lensing magnification; negative determinant retains image parity.
- Lensing Parity Determinant Sign Tool Parity of a supplied row-major 2x2 lens mapping Jacobian; no lens model is fitted.
- Luminosity Angular Distance Duality Residual Tool Etherington distance-duality residual under metric photon-conserving propagation; no cosmological parameter fit.
- Magnitude Hubble Parameter Offset Calculate the explicit -5 log10(h/h_ref) absolute-magnitude offset convention without fitting a distance ladder.
- Matter Density Redshift Cubic Term Tool Pressureless conserved nonrelativistic matter scales as (1+z)^3.
- Primordial Spectrum Pivot Amplitude Term Evaluate an explicit dimensionless primordial power-law spectrum A_s(k/k_pivot)^(n_s-1) without running or transfer functions.
- Radiation Density Redshift Quartic Term Tool Freely redshifting radiation density scales as (1+z)^4.
- Redshift Bin Center Shift Tool Calculate redshift bin center shift from explicit caller-supplied inputs.
- Redshift Observation Vs Model Residual Subtract a modeled cosmological redshift from an explicitly matched observation without estimating a cosmological parameter.
- Redshift Scale Factor Gap Tool Compare supplied cosmological scale factor with a=1/(1+z), using present scale factor one.
- Redshift Velocity Composition Gap Tool Collinear special-relativistic beta composition only, not a cosmological redshift-to-recession-velocity conversion.
- Redshift Velocity Small Offset Convention Apply the small-offset convention delta-v=c delta-z/(1+z_ref), without treating cosmological redshift as an exact recession velocity.
- Scale Factor Redshift Log Derivative Tool Normalize the present scale factor to one; derivatives are da/dz and d(ln a)/dz.
- Source Redshift Behind Lens Flag Compare explicit nonnegative cosmological source and lens redshifts under the ordinary monotonic background-distance assumption.
- Standard Candle Distance Modulus Residual Convert an explicit standard-candle distance-modulus residual into its corresponding inferred distance ratio under a matched calibration.
- Survey Solid Angle Fraction Tool Calculate survey solid angle fraction from explicit caller-supplied inputs.
- Wave Number H Per Mpc Label Label a supplied wavenumber in h/Mpc and apply an explicit positive h to obtain Mpc^-1.
- Weak Lensing Reduced Shear Scalar Calculate one signed reduced-shear component gamma/(1-kappa) for explicit convergence other than one.