Directory: gals/

.pro files

ajs_angdidis.pro

Return angular diameter distance to z

ajs_bbd_plot.pro

This procedure produces a surface/contour plot of the bivariate brightness distribution (number of galaxies per unit volume as a function of absolute magnitude and surface brightness)

ajs_bbd_read.pro

This procedure reads BBD (bivariate brightness distribution) data from a binary file created using ajs_bbd_write.

ajs_bbd_write.pro

This procedure takes arrays describing the BBD (bivariate brightness distribution) and writes the data either to a binary file or to a text file.

ajs_choloniewski.pro

This function generates a Choloniewski function along an input array of absolute magnitudes and surface brightnesses.

ajs_choloniewski_fit.pro

This function finds the best-fitting Choloniewski function for input arrays of absolute magnitudes, surface brightness, phi and phi_err.

ajs_comdis.pro

Return comoving distance to z, in Mpc

ajs_comvol.pro

Return comoving volume out to redshift z (flat universe only)

ajs_distmod.pro

Return distance modulus to z

ajs_dm_k.pro

This function returns some combination of the distance modulus, K-correction and evolution correction for a galaxy at a redshift z.

ajs_double_choloniewski.pro

This function generates a double Choloniewski function along an input array of absolute magnitudes and surface brightnesses.

ajs_double_choloniewski_fit.pro

(NB: unlikely to be useful!) This function finds the best-fitting double Choloniewski function for input arrays of absolute magnitudes, surface brightness, phi and phi_err.

ajs_double_schechter.pro

This function generates a double Schechter function (single value of M-star, but two values for alpha and phi-star) along an input array of absolute magnitudes.

ajs_double_schechter_fit.pro

This function finds the best-fitting double Schechter function for a given array of absolute magnitudes, phi and phi_err (alpha_2 > alpha_1)

ajs_lf_plot.pro

This procedure produces a plot of the luminosity function.

ajs_lf_read.pro

This procedure reads LF (luminosity function) data from a binary file creaed using ajs_lf_write.

ajs_lf_write.pro

This procedure takes arrays describing the LF (luminosity function) and writes the data either to a binary file or to a text file.

ajs_lookback_time.pro

Return lookback time to z, in years

ajs_lumdis.pro

Return Luminosity distance to z

ajs_number_counts.pro

This procedure calculates the number counts from an input array of magnitudes or log(flux)

ajs_number_counts_plot.pro

This procedure produces a plot of the number counts.

ajs_plot_radec.pro

Plot ra and dec on equal-area plot

ajs_schechter.pro

This function generates a Schechter function along an input array of absolute magnitudes.

ajs_schechter_fit.pro

This function finds the best-fitting Schechter function for a given array of absolute magnitudes, phi and phi_err

ajs_vmax.pro

Calculate Vmax given galaxy data and limits

ajs_vmax_bbd.pro

This procedure calculates the 1/Vmax bivariate brightness distribution from input arrays of two quantities (e.g., absolute magnitude and surface brightness) and weights (e.g., 1/Vmax)

ajs_vmax_lf.pro

This procedure calculates the 1/Vmax luminosity function from input arrays of absolute magnitude and weights (e.g., 1/Vmax)

ajs_vmax_ngals_multiplot_4d.pro

This procedure provides a visualisation of a four-dimensional space density (number of galaxies per unit volume per unit A, B, C, D - absolute magnitudes, etc.).

ajs_zage.pro

Convert redshift to age of Universe, in years