SDSS_DR8.Filament table

The Filament table provides basic properties of single filaments. Each filament contains several points that form the spine of the filament. Filament points are given in the FilPoint table.

Table structure

ColumnTypeUCDUnitDescription
filidintmeta.id
meta.main
unique identification number for a filament
npointsintmeta.numberNumber of points in the filament with spacing.
lendoublephys.sizeMpc/hfilament length, measured along the filament from point to point
ngal1intmeta.numbernumber of galaxies in the filament that are closer than 0.5 h-1 Mpc to filament axis
ngal2intmeta.numbernumber of galaxies in the filament that are closer than 1.0 h-1 Mpc to filament axis
lum1doublephys.luminosity10+10Lsun/h2luminosity of the filament: the sum of luminosities of observed galaxies that are closer than 0.5 h-1 Mpc to filament axis
lum2doublephys.luminosity10+10Lsun/h2luminosity of the filament: the sum of luminosities of observed galaxies that are closer than 1.0 h-1 Mpc to filament axis
xmindoublepos.cartesian.xfilament minimum coordinate in x axis
ymindoublepos.cartesian.yfilament minimum coordinate in y axis
zmindoublepos.cartesian.zfilament minimum coordinate in z axis
xlendoublephys.sizeMpc/hfilament range in x axis
ylendoublephys.sizeMpc/hfilament range in y axis
zlendoublephys.sizeMpc/hfilament range in z axis