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|Redshift-Distance Survey of Early-Type Galaxies: Spectroscopic Data|
We present central velocity dispersions and Mg2 line indicesfor an all-sky sample of ~1178 elliptical and S0 galaxies, of which 984had no previous measures. This sample contains the largest set ofhomogeneous spectroscopic data for a uniform sample of ellipticalgalaxies in the nearby universe. These galaxies were observed as part ofthe ENEAR project, designed to study the peculiar motions and internalproperties of the local early-type galaxies. Using 523 repeatedobservations of 317 galaxies obtained during different runs, the dataare brought to a common zero point. These multiple observations, takenduring the many runs and different instrumental setups employed for thisproject, are used to derive statistical corrections to the data and arefound to be relatively small, typically <~5% of the velocitydispersion and 0.01 mag in the Mg2 line strength. Typicalerrors are about 8% in velocity dispersion and 0.01 mag inMg2, in good agreement with values published elsewhere.
|The Clusters AgeS Experiment (CASE): RR Lyrae variables in the globular cluster NGC 6362|
We present V- and B-band charge-coupled device (CCD) photometry of 35 RRLyr stars in the Southern hemisphere globular cluster NGC 6362. Fourierdecomposition of the light curves was used to estimate the basicproperties of these variables. From the analysis of the RRc stars weobtain a mean mass M=0.531+/-0.014Msolar, luminositylogL/Lsolar=1.656+/-0.006, effective temperatureTeff=7429+/-20 and helium abundance Y=0.292+/-0.002. The meanvalues of the absolute magnitude, metallicity (on Jurcsik's scale) andeffective temperature for 14 RRab stars with `regular' light curves are:MV=0.86+/-0.01, [Fe/H]=-0.93+/-0.04 andTeff=6555+/-25, respectively. From the B-V colours, periodsand metallicities of the RRab stars we estimate the colour excess forNGC 6362 to be equal to E(B-V)=0.08+/-0.01. Using this value we derivethe colours of the blue and red edges of the instability strip in NGC6362 to be (B-V)0BE=0.17 and (B-V)0RE=0.43. From the relations betweenthe Fourier coefficients of RRab and RRc stars and their absolutemagnitudes we estimate the apparent distance modulus to NGC 6362 to be(m-M)V=14.46+/-0.10. From the mean value oflogL/Lsolar of the RRc stars we obtain 14.59+/-0.03. TheV-band light curves of three of the RRc stars exhibit changes inamplitude of over 0.1mag on the time-scale of around one week. Near theradial first overtone frequency we find one or two peaks, which stronglysuggests that these variables belong to the newly identified group ofnon-radial pulsating RR Lyr stars.
|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
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