Column information for the table: S4G
Table Description: Spitzer Survey of Stellar Structure in Galaxies
ColumnDescription
pgc PGC number
ID S4G catalog running number
Name Common name
Mod Decomposition model; b=bulge; d=disk;; dd=inner & outer disks; bar=bar
N Number of components in final model
Q Quality flag; if Q=1 or 2 then MODEL="-" and N=0; Q=4 OK, Q=5 best
Nuc Unresolved central component
Nrel Fractional contribution of nucleus to total model flux
Nmag Nuclear component total [3.6] AB magnitude
S1 Inner Sersic component; B=bulge; D=disk
S1rel Fractional contribution of inner Sersic component to total model flux
S1mag Inner Sersic component total [3.6] AB magnitude
S1re Inner Sersic effective radius
S1ar Inner Sersic axial ratio
S1pa Inner Sersic position angle; ccw from North
S1n Inner Sersic index
D1 Inner disk component; D=disk
D1rel Fractional contribution of inner disk component to total model flux
D1mag Inner disk component total [3.6] AB magnitude
D1hr Inner disk exponential scale length
D1ar Inner disk axial ratio
D1pa Inner disk position angle; ccw from North
D1mu0 Deprojected inner disk central surface brightness
F1 Inner ferrers-component
F1rel Fractional contribution of inner ferrers-component to total model flux
F1mu0 Inner ferrers-component central surface brightness
F1rout Bar outer truncation radius
F1ar Inner ferrers-component axial ratio
F1pa Inner ferrers-component position angle; ccw from North
E1 Inner edge-on disk component; Z=edge-on disk
E1rel Fractional contribution of inner edge-on disk to total model flux
E1mu0 Deprojected inner edge-on disk central surface brightness
E1rs Inner edge-on disk radial scale length
E1hs Inner edge-on disk vertical scale length
E1pa Inner edge-on disk position angle; ccw from North
S2 Outer Sersic component; B=bulge; D=disk
S2rel Fractional contribution of outer Sersic component to total model flux
S2mag Outer Sersic component total [3.6] AB magnitude
S2re Outer Sersic effective radius
S2ar Outer Sersic axial ratio
S2pa Outer Sersic position angle; ccw from North
S2n Outer Sersic index
D2 Outer disk component; D=disk
D2rel Fractional contribution of outer disk component to total model flux
D2mag Outer disk component total [3.6] AB magnitude
D2hr Outer disk exponential scale length
D2ar Outer disk axial ratio
D2pa Outer disk position angle; ccw from North
D2mu0 Deprojected outer disk central surface brightness
F2 Outer ferrers-component
F2rel Fractional contribution of outer ferrers-component to total model flux
F2mu0 Outer ferrers-component central surface brightness
F2rout Bar outer truncation radius
F2ar Outer ferrers-component axial ratio
F2pa Outer ferrers-component position angle; ccw from North
E2 Outer edge-on disk component; Z=edge-on disk
E2rel Fractional contribution of outer edge-on disk to total model flux
E2mu0 Deprojected outer edge-on disk central surface brightness
E2rs Outer edge-on disk radial scale length
E2hs Outer edge-on disk vertical scale length
E2pa Outer edge-on disk position angle; ccw from North
pgc PGC number
mag Total [3.6] magnitude
q Axial ratio
PA Elliptical isophote position angle
n Sersic index
Re Effective radius
name Common name
f 0=good fit; 1=fit uncertain; 2=no fit
comment Comment on fit
pgc PGC number
Name Common name
GpID Tully 3000 group identification number
J2000 RA and Dec, J2000
Glon Galactic Longitude
Glat Galactic Latitude
SGL Supergalactic Longitude
SGB Supergalactic Latitude
T Morphological type from RC3
logd25 log of apparent diameter d25 from RC3 (units 0.1 arcmin)
logr25 log of ratio major/minor axes from RC3
Bt Total B magnitude from RC3
It Total I magnitude from RC3
Vhel Heliocentric velocity
Ag Galactic extinction in B band (Schlegel et al.)
Inc Inclination from RC3
a25.5 Semi-major axis at mu_3.6=25.5 AB mag/arcsec2
PA Position angle at mu_3.6=25.5 AB mag/arcsec2
Ell Ellipticity (1-b/a) at mu_3.6=25.5 AB mag/arcsec2
[3.6] Asymptotic magnitude at 3.6 microns
e3.6 Growth curve fitting error in [3.6] mag
[4.5] Asymptotic magnitude at 4.5 microns
e4.5 Growth curve fitting error in [4.5] mag
7525 r75/r25 concentration index at 3.6 microns
C82 5*log10(r80/r20) concentration index at 3.6 microns
M3.6 Absolute magnitude at 3.6 microns (S4G assumed distance)
M4.5 Absolute magnitude at 4.5 microns (S4G assumed distance)
Msun log10(stellar mass at S4G assumed distance)
DataAccess Data access