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glossary for ECO DR2 searchable online database

parameter unit description
name ECO galaxy identifier
RAdeg deg Right Ascension in decimal degrees
DEdeg deg Declination in decimal degrees
cz km/s Local group corrected velocity of galaxy
absrMag mag Absolute SDSS r-band magnitude (foreground extinction included)
logMstar log(Msun) Log stellar mass as calculated in Eckert+16
logMbary log(Msun) Log baryonic mass (stars + cold gas, where cold gas is defined as 1.4 times the HI mass) as calculated in Eckert+16
PGFFlag Flag indicating which color is used to compute the Photometric Gas Fraction distribution for each galaxy in Eckert+16: 1=modelu_J, 2=modelu_K, 3=modelu_r, 4=modelg_r
HItype_E16 Flag indicating what type of HI distribution was used to compute logMbary in Eckert+16: 1=HI detection, 2=PGF, 3=PGF cutoff by upper limit.
logMgas_JF21 log(Msun) Log cold gas mass (where cold gas is defined as 1.4 times the HI mass) as calculated in Florez+21. *Note Mgas_JF21+Mstar does not equal Mbary. Florez+21 used a slightly different algorithm than Eckert+16 to decide whether or not to use the PGF vs HI measurement. Additionally, an error was discovered in the limit measurements used in Eckert+16, albeit the error did not affect any results within the uncertainties and the limits per se were not published. That error was fixed for Florez+21.*
HItype_JF21 log(Msun) Flag indicating whether the gas mass in Florez+21 was computed from the HI measurement or the PGF distribution: 1=HI detection, 2=PGF.
modelu_rcorr mag SED modeled (u-r) color including correction for internal extinction (foreground corrections and k-corrections implicity included, as described in Eckert+16 and used in Florez+21)
modelu_j mag SED modeled (u-J) color (foreground corrections and k-corrections implicity included, as described in Eckert+16)
modelu_k mag SED modeled (u-K) color (foreground corrections and k-corrections implicity included, as described in Eckert+16)
modelu_r mag SED modeled (u-r) color (foreground corrections and k-corrections implicity included, as described in Eckert+16)
modelg_r mag SED modeled (g-r) color (foreground corrections and k-corrections implicity included, as described in Eckert+16)
R50 arcsec The half-light radius in r band (as calculated in Eckert+16)
R90 arcsec The 90%-light radius in r band (as calculated in Eckert+16)
b_a axial ratio of galaxy as calculated in Eckert+2016
mu_delta log(Msun/kpc^2) stellar surface mass density with R50 minus stellar surface mass density between R50 and R90 (see Kannappan+2013 for details) that serves as proxy for galaxy morphology. Values as calculated in Eckert+2016
MorphEL string "E" = early type, "L" = late type (as originally calculated in Moffett+15, if galaxy was not part of the Moffett+15 sample the value was calculated using the quantitative cut provided by Moffett+15)
FMorphEL Morphology Source Flag, 1 = quantitative cut from Moffett et al. (2015), 2=by eye from Lintott et al. (2011)
Den1Mpc normalized environmental density smoothed at 1Mpc scale (value is -999 if galaxy was not part of Moffett+2015 sample)
FM15 1/0 flag for for membership in the ECO sample used Moffett+2015; for data used in that paper see ECO DR1
Grp_e16 Group identifier for galaxy groups in Eckert+2016
Grpra_e16 deg Right Ascension of group center, for galaxy groups in Eckert+2016
Grpdec_e16 deg Declination of group center, for galaxy groups in Eckert+2016
Grpcz_e16 km/s Velocity of group center, adopted galaxy velocity for survey membership for galaxy groups in Eckert+2016
GrpN_e16 Number of galaxies in group for galaxy groups in Eckert+2016
FC_e16 1/0 flag for central=1 or satellite=0 for galaxy groups in Eckert+16
logMh_e16 log(Msun) Log group halo mass for galaxy groups in Eckert+16
CCr Completeness correction factor due to redshift incompleteness (from Eckert+2016)
CCb Completeness correction factor accounting for boundary effects (from Eckert+2016)
Fe16 1/0 flag indicating whether galaxy was considered in sample for Eckert+16
Grp_e17 Group identifier for galaxy groups in Eckert+2017. Eckert+2017 included an algorithm to break up false pairs. eckert+17 groups with N>2 are identical to Eckert+16 groups.
Grpra_e17 deg Right Ascension of group center, for galaxy groups in Eckert+2017
Grpdec_e17 deg Declination of group center, for galaxy groups in Eckert+2017
Grpcz_e17 km/s Velocity of group center, adopted galaxy velocity for survey membership for galaxy groups in Eckert+2017
GrpN_e17 Number of galaxies in group for galaxy groups in Eckert+2017
FC_e17 1/0 flag for central=1 or satellite=0 for galaxy groups in Eckert+17 *Note: This flag was incorrect in the original published catalog but has been corrected in this database and in an erratum with an updated catalog.*
grpms_e17 log(Msun) Log group-integrated stellar mass for galaxy groups in Eckert+17
grpmb_e17 log(Msun) Log group-integrated baryonic mass (stars + cold gas, where cold gas is defined as 1.4 HI mass) for galaxy groups in Eckert+17
logMh_e17 log(Msun) Log group halo mass for galaxy groups in Eckert+17
logMh_s_e17 log(Msun) Log group halo mass assigning mass based on group-integrated stellarmass for galaxy groups in Eckert+17
logMh_dyn_e17 log(Msun) Log group halo mass using dynamics, computed for N>2 groups in Eckert+ 2017
logMh_dyn_stack_e17 log(Msun) Log group halo mass using dynamics with stacking to improve statistics for low-N groups, computed for N>2 groups in Eckert+ 2017
logMh_dyn_smooth_e17 log(Msun) Log group halo mass using dynamics, transitioning smoothly from stacked estimates to direct measurements as described in Eckert+ 2017
Grpsig_e17 km/s group velocity dispersion measured using Gapper method for N>2 groups in Eckert+17
Grprproj_e17 projected radius from group center for N>2 groups in Eckert+2017
FE17 1/0 flag indicating whether galaxy was considered in sample for Eckert+17