The Edge-on Galaxy Database

The catalog contains 149224 nearly edge-on galaxies found in the images of the DESI Legacy Surveys.

The catalog contains 16551 nearly edge-on galaxies over 3/4 of the sky (δ ≳ −30°) in the Pan-STARRS DR2. The candidates for the EGIPS catalogue were found by an Artificial Neural Network. The visual inspection allowed us to reject image artifacts and to estimate the proximity of the galaxies to the edge-on orientation.

Created in 1999, the catalog (Karachentsev et al., 1999) contains 4236 thin edge-on spiral galaxies with a blue diameter greater than a = 40 arcsec and a blue major-to-minor axis ratio a/b ≥ 7 over the whole sky. Additionally, for the sake of continuity, the catalog includes 208 objects from the previous versions, which ceased to meet the selection criterion after the specification of their parameters. RFGC is a revised and combined version of The Flat Galaxy Catalogue (FGC, Karachentsev et al., 1994) and its southern extension (FGCE). The FGC objects (N=2573) were found during during systematic visual inspection of all O-prints of the Palomar Observatory Sky Survey (−20° ≲ δ ≤ +90°), while FGCE objects (N=1882) were selected on the J-films of the ESO/SERC sky survey. The 291 galaxies from FGC and FGCE were excluded from the final version of RFGC due to the violation of the a/b ≥ 7 criterion.

The catalog of true edge-on disk galaxies (Bizyaev et al., 2014) is automatically selected from the Seventh Data Release of the Sloan Digital Sky Survey (SDSS). It contains 5747 genuine edge-on galaxies after visual inspection of the g, r, i images of 14983 candidates. The initiial sample were obtained with a criterion: petroMag_g < 20 & isoA_g > 37.8 & isoA_g/isoB_g > 3 & -0.5 < dered_g - dered_r < 2 & -0.5 < dered_r - dered_r < 2 The visual inspection allows to split the initial sample on: true edge-on galaxies (4768), non-edge-ons (8350) and objects with a complex structure (1865). Since the initial automatic selection of the galaxy candidates did not include a significant number of the largest edge-on galaxies, the final version of EGIS catalog incorporates edge-on candidates by supplying objects from RFGC, RC3, EFIGI, and Galaxy Zoo that were found in the SDSS footprints.

The all-sky catalog (Mitronova et al. 2004) of 18020 disc-like galaxies is selected from the Extended Source Catalog of the Two Micron All-Sky Survey (XSC 2MASS) using a criterion on the 2MASS axial ratio a/b ≥ 3.