Halo evolution web-calculator (version 1.03)


    background universe type:
                                    flat universe - background universe is flat with omegam0 in (0,1]; with/without cosmological constant
                                    open universe - background universe is open with omegam0 in (0,1); without cosmological constant

    omegam0: matter density at redshift 0 in critical units; including dark matter and baryon

    power spectrum type:
                                    0 - power-law power spectrum;
                                    1 - Eisenstein & Hu 1998 power spectrum (effects of baryon and radiation have been taken into account);
                                    2 - BBKS 1986 power spectrum;
                                    3 - Bond & Efstathiou 1987 power spectrum;
                                    4 - DEFW 1985 power spectrum

    h: H_0/[100 km/s/Mpc], i.e., Hubble constant at redshift 0 in [100 km/s/Mpc]

    sigma8: linear density variance at redshift 0 in sphere of redius 8 Mpc/h

    tilt: power index of primodial power spectrum; should be >-3; to be 1 for the Harison-Zel'dovich scale-invariant spectrum

    output type:
                                    evolution of given halo - properties along the median mass accretion history of final offspring halos of mass lgMobs WILL be output;
                                    dependence on mass - properties of final offspring halos of many different masses at redshift zobs WILL be output

    zobs: redshift at which you choose final offspring halos; should be >-1

    lgMobs: logarithmic VIRIAL mass of halos you choose, in [M_sun/h]


       


Notes

1. Output package:
     After you submit, the calculator will produce a package for you to download. The package comprises four files: 1) calculation output file; 2) error information file; 3) a README file with detailed description on output format; and 4) a file 'mandcweb.sm' with some sample Super Mongo macros, which can be used to plot both mass & redshift dependence of halo median concentration and evolution of halo properties along its mass accretion history.

2. For users interested in different halo definitions:
     For the second output type, mass dependences of halo properties in DIFFERENT HALO DEFINITIONs are all output.
     For the first output type, one need to input a halo mass. Eeven though the halo mass input, lgMobs, should always be VIRIAL mass, it's still easy to get property evolution for final offspring halos of a given mass in OTHER HALO DEFINITIONs, i.e., one can start from a mass in other halo definitions easily. Please see README in the output package for detailed instruction.

3. This calculator is developed and maintained by Donghai Zhao (dhzhao@shao.ac.cn). A main program version code and a subroutine version code which both perform the same as this web calculator are also available from http://www.shao.ac.cn/dhzhao/mandc.html. Any comment or suggestion from you will be appreciated much! Version history:
     Version 1.00 (2008.11.02)
     Version 1.03 (2010.09.14, the current version): changes are listed in the file README in the output package.