SDSS_DR8.FilGalaxy table

The FilGalaxy table provides a link between filament points and galaxies from the Galaxy table. Galaxies that are not linked to any filament have filid = 0 and pointid = 0.

Table structure

ColumnTypeUCDUnitDescription
galidintmeta.id
meta.main
unique identification number for a galaxy
ngalintmeta.numberrichness of the group the galaxy belongs to
zcmbdoublesrc.redshiftredshift, corrected to the CMB rest frame
raj2000doublepos.eq.radegright ascension (deg)
dej2000doublepos.eq.decdegleft ascension (deg)
dist_cordoublepos.distanceMpc/hco-moving distance of the galaxy when the finger-of-god effect is suppressed (as used in filament extraction)
mag_ufloatphot.mag
em.opt.U
magGalactic extinction corrected Petrosian magnitude in u filter
mag_gfloatphot.mag
em.opt.B
magGalactic extinction corrected Petrosian magnitude in g filter
mag_rfloatphot.mag
em.opt.R
magGalactic extinction corrected Petrosian magnitude in r filter
mag_ifloatphot.mag
em.opt.I
magGalactic extinction corrected Petrosian magnitude in i filter
mag_zfloatphot.mag
em.opt.I
magGalactic extinction corrected Petrosian magnitude in z filter
lum_rfloatphys.luminosity
em.opt.R
10^10L_sun/h^2absolute luminosity in the r-band
weightfloatstat.weightweight factor for the galaxy (weight times lum_r was used to calculate the luminosity density field
dist_edgefloatpos.distanceMpc/hco-moving distance of the galaxy from the border of the survey mask
dist_filfloatpos.distanceMpc/hdistance from the nearest filament axis (or from filament end point)
filidintmeta.idid of the nearest filament
pointidbigintmeta.idid of the nearest filament point