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  J/ApJ/655/790
 Groups of galaxies in 2MASS survey (Crook+, 2007)
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img(gal)
1.J/ApJ/655/790/groups(c)Catalog of Groups in the 2MASS Redshift Survey (Low-density-contrast + High-density-contrast, tables 6 and 7 of paper) (Note) (2865 rows)
2.J/ApJ/655/790/large(c)Large groups (High-density-contrast groups with ≥25members, or Low-density-contrast groups with ≥50members, tables 8 and 9 of paper) (Note) (44 rows)
3.J/ApJ/655/790/galaxies(c)Members of the groups (table 10 and 11 of paper) (Note) (18737 rows)
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Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)n_Group (char) {f L} for Low-density-contrast group, or {f H} for High-density-contrast group (meta.id.part;meta.main)
   (ALL)Group  Group number (Note 1)   (meta.id;meta.main)
   (ALL)RAJ2000 "h:m:s" Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
   (ALL)DEJ2000 "d:m:s" Degree of Declination (J2000) (pos.eq.dec;meta.main)
  (1+2)Nm  Number of members in Group (Note 2)   (meta.number)
  (1)NmS  Number of simulated members in Group (meta.number)
   (ALL)Dist Mpc Mean (corrected) group distance, assuming h=0.73 (pos.distance;pos.heliocentric)
  (1+3)HV km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
  (1+2)sigma km/s Line-of-sight velocity dispersion (phys.veloc.dispersion)
  (1+2)Rp Mpc Projected virial radius (phys.size.radius)

ALL cols
    
   
  (1+2)logM [solMass]Log of the virial mass (phys.mass)
  (1+2)logMp [solMass]Log of the projected mass (phys.mass)
  (1+2)logM/L [solMass/solLum]Log of projected mass-to-light ratio (phys.luminosity)
  (1)a arcmin Semi-major axis of the ellipse fit (Note 3)   (phys.angSize.smajAxis;meta.modelled)
  (1)b/a  (n) Axis ratio of group ellipse fit (phys.angSize;arith.ratio)
  (1)PA deg (n) Semi-major axis position angle (Note 4)   (phys.angSize.smajAxis)
  (1+2)LDC  (n) LDC catalog group number that includes all members of this group (for table7.dat only) (meta.id)
  (2)NmG  Number of group members derived from the Galactic-plane population (meta.number)
  (2)VG km/s Mean heliocentric group velocity (spect.dopplerVeloc;stat.mean)
  (2)Note (char) Composition of group based on known galaxy clusters and superclusters (meta.note)
  (3)Name (char) Member identification (Note 2)   (meta.id;meta.main)
  (3)Kmag mag 2MASS K band magnitude (phot.mag;em.IR.K)
  (3)Agrp  (n) Corresponding group number assigned to the galaxy when in the HDC (table10) or LCD (table11) catalog (meta.id.parent)

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