J/MNRAS/276/1341 J/MNRAS/276/1341 Spectroscopy for E and S0 galaxies clusters I Jorgensen M Franx P Kjaergaard MNRAS 276 1341 1995 1995MNRAS.276.1341J Clusters, galaxy Galaxies, spectra Central velocity dispersions, Mg2 line indices, and radial velocities for 220 E and S0 galaxies are derived on basis of intermediate resolution spectroscopy. Galaxies in the following clusters have been observed: Abell 194, Abell 539, Abell 3381, Abell 3574, S639, S753, Doradus, HydraI (Abell 1060), and Grm15. The spectra cover 500 or 1000 Angstrom centered on the magnesium triplet at 5177 Angstrom.

In this catalog we give the mean values of the parameters. The central velocity dispersion and the Mg2 line indices have been aperture corrected to a circular aperture with a diameter of 1.19 h^(-1) kpc, equivalent to 3.4arcsec at the distance of the Coma cluster. Values are also given for a circular aperture with radius equal to the effective radius of the galaxy (cf. Jorgensen et al. MNRAS, 273, 1097 (1995)). The Mg2 indices are consistent with the Lick system. The typical uncertainty of the central velocity dispersion is 0.036 in log(sigma), the typical uncertainty of Mg2 is 0.013. Further, literature data (velocity dispersions and Mg2 indices) for the clusters A194, DC2345-28 and Coma (A1656) have been brought on a homogeneous system and aperture corrected to the aperture sizes given above. The literature data are from Davies et al. (ApJS, 64, 581 (1987), Dressler (ApJ, 317, 1 (1987), Dressler & Shectman (AJ, 95, 284 (1988)), Lucey & Carter (MNRAS, 235, 1177 (1988)), Lucey et al. (MNRAS, 253, 584 (1991)), and Guzman et al. (MNRAS, 257, 187 (1992)).

Cluster Cluster name --- Galaxy Galaxy name --- RAh Right ascension hours (1950.0) h RAm Right ascension minutes (1950.0) m RAs Right ascension seconds (1950.0) s DE- Sign of declination --- DEd Declination degrees (1950.0) deg DEm Declination minutes (1950.0) arcmin DEs Declination seconds (1950.0) arcsec cz_hel Heliocentric radial velocity km/s lsig_cor log10(sigma), aperture diameter 3.4arcsec at the distance of the Coma cluster (A1656) sigma is the velocity dispersion of the galaxy in km/s. sigma is aperture corrected to the size aperture given in the explanations. --- lsig_re log10(sigma), aperture diameter 2.re, where re is the effective radius in Gunn r --- e_lsig Uncertainty on lsig_cor and lsig_re --- Mg2_lick Mg2 index on Lick system, aperture diameter 3.4arcsec at the distance of the Coma cluster (A1656) Mg2 is the line index of the Mg lines at 5177 Angstrom as defined by Worthey et al. (1994, ApJS, 94, 687). Mg2 is aperture corrected to the size aperture given in the explanations. --- Mg2_re Mg2 index on Lick system, aperture diameter 2.re, where re is the effective in Gunn r --- e_Mg2 Uncertainty on Mg2_lick and Mg2_re --- u_lsig Uncertainty flag on lsig_cor and lsig_re 0 : Signal-to-noise of observation above 20 per Angstrom. 1 : Signal-to-noise of observation below 20 per Angstrom. The velocity dispersion may be affected by systematic errors. --- nobs Number of observations --- Cluster Cluster name --- Galaxy Galaxy name --- RAh Right ascension hours (1050.0) h RAm Right ascension minutes (1950.0) min RAs Right ascension seconds (1950.0) s DE- Sign of declination --- DEd Declination degrees (1950.0) deg DEm Declination minutes (1950.0) arcmin DEs Declination seconds (1950.0) arcsec cz_hel Heliocentric radial velocity km/s lsig_cor log10(sigma), aperture diameter 3.4arcsec at the distance of the Coma cluster (A1656) sigma is the velocity dispersion of the galaxy in km/s. sigma is aperture corrected to the size aperture given in the explanations. --- lsig_re log10(sigma), aperture diameter 2.re, where re is the effective radius in Gunn r --- Mg2_lick Mg2 index on Lick system, aperture diameter 3.4arcsec at the distance of the Coma cluster (A1656) Mg2 is the line index of the Mg lines at 5177 Angstrom as defined by Worthey et al. (1994, ApJS, 94, 687). Mg2 is aperture corrected to the size --- Mg2_re Mg2 index on Lick system, aperture diameter 2.re, where re is the effective in Gunn r --- Inger Jorgensen McDonald Observatory, Austin, Texas 1995Nov30 J_MNRAS_276_1341.xml