Open Access
Table C.1.
Descriptions of the columns for the clean SDSS FoF groupsa
| Column | Unit | Description | Example |
|---|---|---|---|
| GROUP_ID (1) | FoF group identification number | 424 | |
| RA_OPT (2) | deg | Highest rank galaxy next X-ray peak, right ascension (J2000) | 246.9701 |
| DEC_OPT (3) | deg | Highest rank galaxy next X-ray peak, declination (J2000) | 40.9343 |
| NMEM (4) | Number of spectroscopic members after the cleaning | 95 | |
| ZSPEC (5) | Group redshift, assigned using median value of clean members | 0.0314 | |
| VDISP_GAP (6) | km s−1 | Gapper estimate of the cluster velocity dispersion | 572.5 |
| EVDISP_GAP (7) | km s−1 | Error on VDISP_GAP | 53.7 |
| VDISP_MAD (8) | km s−1 | Velocity dispersion from mean absolute deviation | 746.0 |
| R_200c (9) | kpc | R200c radius | 1247.9181 |
| L_R195_CLEAN (10) | L⊙ | L_R_CLEAN, using Mr < −19.5 galaxy sample (z< 0.06 groups) | 93.4 × 1010 |
| EL_R195_CLEAN (11) | L⊙ | Error on L_R195_CLEAN | 0.004×1010 |
| D_10 (12) | 0.01227 × 1010 M⊙ Mpc−3 | Large-scale density | 16.55 |
| ED_10 (13) | 0.01227 × 1010 M⊙ Mpc−3 | Error on D_10 | 0.025 |
a The full VAC is available online at CDS
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