Mass-Sigma-Temperature data

The data files herein give the relation between the velocity dispersion and/or temperature and the mass of halos in some of my simulations. Each file is labelled by a name describing the cosmology (see below) and an output time (only a=1.0000 for now, but a summary of the redshift evolution can be found in sigmaM_vs_z.dat and sigmaM_vs_z.ps).

The first column is M15 (i.e. M_{200-crit} in units of 10^{15}Msun/h), the second column is the velocity dispersion of the particles within r_{200} in km/s, the third column is the inferred sigma15 (also km/s) through

(M/10^{15}Msun/h) = (sigma/sigma15)^3

If the run contains gas then the fourth and fifth columns are the mass weighted temperature within r_{200} in keV and kT15 defined through

(M/10^{15}Msun/h) = (kT/kT15)^(3/2)

These runs have no energy injection, and are done with the entropy conserving SPH scheme that Volker Springel invented.

The files contain only groups with more than 1500 particles in the FoF halo, which should be quite conservative. The averages and cosmologies are:

Name             Box	OmM     OmL     h       s8      sigma15         kT15
Run2		1086	0.3	0.7	0.7	0.9	1078.5		N/A
lcdm500A	 500	0.3	0.7	0.7	0.9	1077.2		N/A
lcdm300A         300	0.3     0.7     0.7     1.0     1078.6	        N/A
lcdm300B         300	0.3     0.7     0.7     0.8     1075.0	        N/A
lcdm256A         256	0.3     0.7     0.7     0.9     1077.8	        N/A
lcdm128A         128	0.3     0.7     0.7     0.9     1091.2	        N/A
OS200            200	0.3     0.7     0.67    0.9     1064.3	        N/A
OS100            100	0.3     0.7     0.67    0.9     1070.9	        N/A
Concordance150_1 150	0.3     0.7     0.67    0.9     1066.0	        6.28
Concordance150_2 150	0.3     0.7     0.67    0.9     1066.4	        6.35
ocdm256A	 256	0.3	0.0	0.7	0.9	1099.5		N/A
Model00?	 200	see below
where the box side is in Mpc/h. The first two simulations have 1024^3 particles (and the data are for halos with more than 5000 particles), the next four simulations have 512^3 particles, the next two 256^3, the next two 2x192^3. These two runs differ only in the random number seed used in constructing the initial conditions. The open CDM model and the varying w cosmologies use 256^3 particles (see below). All simulations use n=1.0 except ocdm256A, lcdm256A and lcdm128A which have n=0.95.

Index of Sigma

NameSize (KB)Last modified
bepi.ps 512003/06/09
Concordance150_1_1.0000.sig 132003/01/27
Concordance150_3_1.0000.sig 132003/01/27
lcdm128A_1.0000.sig 932003/06/05
lcdm256A_1.0000.sig 932003/06/05
lcdm300A_1.0000.sig 992003/01/27
lcdm300B_1.0000.sig 812003/01/27
lcdm500A_1.0000.sig 2252006/04/21
model001.sig 102004/03/14
model002.sig 102004/03/14
model003.sig 102004/03/14
model004.sig 102004/03/14
model005.sig 92004/03/14
model006.sig 92004/03/14
model007.sig 102004/03/14
model008.sig 92004/03/14
ocdm256A_1.0000.sig 92006/04/25
OS100_1.0000.sig 122003/01/27
OS200_1.0000.sig 102003/01/27
run2_1.0000.sig 592006/09/05
sig15_res_lcdm.ps 192003/06/09
sigmaM_vs_z.dat 22003/02/10
sigmaM_vs_z.pdf 102003/10/16
sigmaM_vs_z.ps 182003/02/10


Return to Martin's home page


Last modified Tue Sep 5 09:35:19 2006