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File Formats

Page history last edited by Alexander Knebe 9 years ago

Halo Catalogues

All halo catalogues have been generated with AHF and the format is described on pages 162++ in the user's guide.

You are most likely only interested in the _halos files which contain a variety of properties (position, velocity, mass, radius, etc.) of identified halos:

01	haloid	unique haloid across all snapshots
02	hostHalo	haloid of host halo
03	numSubStruct	number of subhaloes
04	Mass_bound	exclusive bound mass (npart*mp) in [Msun/h]
05	npart	exclusive number of particles
06	X
07	Y	halo position in [kpc/h]
08	Z
09	Vx
10	Vy	halo physical velocity in [km/sec]
11	Vz
12	Radius	[kpc/h]
13	Rmax	position where GM(<r)/r peaks
14	r2	scale radius in [kpc/h]
15	mbp_offset	most-bound-particle position to (X,Y,Z) offset
16	com_offset	centre-of-mass to (X,Y,Z) offset
17	Vmax	peak value of GM(<r)/r
18	Vesc	escape velocity at radius(12)
19	sigV	3D velocity dispersion
20	lambda	abs(total angular momentum)/Mass_bound/sqrt(2.GMass_bound*Effective_radius)
21	lambdaE	Peebles (1991) spin parameter
22	Lx
23	Ly	orientation of angular momentum \|L\|=1
24	Lz
25	b/a	(normalized) second largest axis of moment of inertia
26	c/a	(normalized) third largest axis of moment of inertia tensor
27	Eax
28	Eay	largest axis of moment of inertia tensor \|Ea\|=1
29	Eaz
30	Ebx
31	Eby	second largest axis of moment of inertia tensor \|Eb\|=1
32	Ebz
33	Ecx
34	Ecy	third largest axis of moment of inertia tensor \|Ec\|=1
35	Ecz
36	ovdens	overdensity at radius(12)
37	nbins	number of bins used for radial profile
38	fMhires	fraction of mass in high-resolution particles
39	Ekin	kinetic energy [Msun/h (km/sec)^2)]
40	Epot	potential energy [Msun/h (km/sec)^2)]
41	SurfP	surface pressure term [Msun/h (km/sec)^2)]
42	Phi0	potential normalisation [(km/sec)^2]
43	cNFW	NFW concentration
44++		for the NR and FP runs there are even more columns, please check the user's guide for their meaning

The _luminosities and _magnitudes files available for the full physics runs were generated with the STARDUST code (Devriendt et al. 1999); they contain for each identified halo the luminosity/magnitude in 19 different wavebands (same ordering of haloes as in the _halos file). Note that stars residing in subhaloes are not contributing to the luminosities of the halo; if you want luminosities where those are included, that will not pose a problem: contact one of the organizers...

Simulation Snapshots

All snaphots written by the respective code have been converted to the same format, i.e. GADGET's file format 2.

Galaxy Catalogues

The galaxy catalogues are all written in the nIFTy galaxy format:

Header line:

Z_solar L_solar

01	haloid	ID of dark matter halo as found in merger tree
02	galaxyhostid	ID of host DM halo to which this galaxy last belonged
03	galaxy_is_orphan	flag indicating whether the host DM halo still exists (0, no orphan galaxy) or not (1, orphan galaxy)
04	X	galaxy X position in comoving [kpc/h]
05	Y	galaxy Y position in comoving [kpc/h]
06	Z	galaxy Z position in comoving [kpc/h]
07	Vx	galaxy X physical peculiar velocity [km/sec]
08	Vy	galaxy Y physical peculiar velocity [km/sec]
09	Vz	galaxy Z physical peculiar velocity [km/sec]
10	Mcold	cold gas mass [Msun/h]
11	Mhot	hot gas mass [Msun/h]
12	Mstar	stellar mass [Msun/h]
13	Mbh	mass of central black hole [Msun/h]
14	Z_gas	metalicity of the cold gas in the galaxy [Zsolar]
15	Z_stars	metalicity of stars [Zsolar]
16	T_stars	mean age of stellar population [Gyrs]
17	SFR	star formation rate [Msun/h yr^(-1)]
18	SFRbulge	star formation rate in the bulge [Msun/h yr^(-1)]
19	M_hot,halo	mass of hot gas in the diffuse halo/atmosphere [Msun/h]
20	M_cold,halo	mass of cold gas in the diffuse halo: cold flows, cooling flows [Msun/h]
21	Meject	mass of gas ejected from the halo [Msun/h]
22	M_outflowed	mass of gas outflowed from galaxy but retained within the halo [Msun/h]
23	M_gas,disk	mass of gas in the disk [Msun/h]
24	M_gas,spheroid	mass of gas in the spheroid/bulge [Msun/h]
25	M_stars,disk	mass of stars in the disk [Msun/h]
26	M_stars,spheroid	mass of stars in the spheroid/bulge [Msun/h]
27	M_bh	total mass of black hole(s) [Msun/h]
28	M_ICstars	mass of stars in intracluster mass (i.e. stripped stars) [Msun/h]
29	M_total	total baryons associated to the halo, including ejected mass [Msun/h]
30	MZ_hot,halo	mass of metals in hot gas in the diffuse halo/atmosphere [Msun/h]
31	MZ_cold,halo	mass of metals in cold gas in the diffuse halo [Msun/h]
32	MZeject	mass of metals in gas ejected from the halo [Msun/h]
33	MZ_outflowed	mass of metals in gas outflowed from galaxy but retained within the halo [Msun/h]
34	MZ_gas,disk	mass of metals in gas in the disk [Msun/h]
35	MZ_gas,spheroid	mass of metals in gas in the spheroid/bulge [Msun/h]
36	MZ_stars,disk	mass of metals in stars in the disk [Msun/h]
37	MZ_stars,spheroid	mass of metals in stars in the spheroid/bulge [Msun/h]
38	MZ_bh	total mass of metals in black hole(s) [Msun/h]
39	MZ_ICstars	mass of metals in stars in intracluster mass (i.e. stripped stars) [Msun/h]
40	BoverT	bulge-to-total stellar mass ratio (total=bulge+disc)
41	r1/2	overall half-mass radius in physical [kpc/h]
42	r1/2_bulge	3D half-mass radius of bulge in physical [kpc/h]
43	r1/2_disk	half-mass radius of disk in physical [kpc/h]
44	nuv_ext	Rest-frame absolute AB magnitude for the Galex NUV band (around 2200\AA) with dust
45	B_ext	Rest-frame absolute AB magnitude for the RGO B band (around 4369\AA) with dust
46	V_ext	Rest-frame absolute AB magnitude for the RGO V band (around 54038\AA) with dust
47	g_ext	Rest-frame absolute AB magnitude for the SDSS g band (around 4260\AA) with dust
48	r_ext	Rest-frame absolute AB magnitude for the SDSS r band (around 5605\AA) with dust
49	K_ext	Rest-frame absolute AB magnitude for the UKIDSS K band (around 2.1\um) with dust
50	nuv	Rest-frame absolute AB magnitude for the Galex NUV band (around 2200\AA) without dust
51	B	Rest-frame absolute AB magnitude for the RGO B band (around 4369\AA) without dust
52	V	Rest-frame absolute AB magnitude for the RGO V band (around 54038\AA) without dust
53	g	Rest-frame absolute AB magnitude for the SDSS g band (around 4260\AA) without dust
54	r	Rest-frame absolute AB magnitude for the SDSS r band (around 5605\AA) without dust
55	K	Rest-frame absolute AB magnitude for the UKIDSS K band (around 2.1\um) without dust