next previous
Up: Photometric catalog of nearby clusters


   
4 Parameters for the GGC sample


 

Table 1: Identifications, positional data and metallicity for the observed clusters
\begin{displaymath}\begin{tabular}{rlccccccccclc}
\noalign{\smallskip }
\hline
\...
...2.13 $
& $-2.02$ \\
\noalign{\smallskip }
\hline
\end{tabular}\end{displaymath}


In the following cases, the [Fe/H] values were taken directly from ($^{\rm 1}$) ZW84 and ($^{\rm 2}$) CG97.  
a Right Ascension (2000) Sun-Centered coordinates: g X: Toward the Galactic Center
b Declination (2000)   h Y: in direction of Galactic rotation
c Galactic Longitude   i Z: Towards North Galactic Plane
d Galactic Latitude    
e Heliocentric Distance [Fe/H] (From Rutledge et al. 1997): j in the ZW84 scale
f Galactocentric Distance   k in the CG97 scale.


 

Table 2: Photometric parameters
\begin{displaymath}\begin{tabular}{rlcccrrccccrrc}
\noalign{\smallskip }
\hline
...
...85 & 25.4 & 0.67 \\
\noalign{\smallskip }
\hline
\end{tabular}\end{displaymath}

 
a Foreground reddening e Absolute visual magnitude    
b HB Level (our measures) f Integrated color indices    
c Apparent visual distance modulus g Specific frequency of RR Lyrae variables    
d Integrated V mag of clusters h HB ratio: HBR=(B-R)/(B+V+R).    


 

Table 3: Kinematics, and structural parameters
\begin{displaymath}\begin{tabular}{rlrrccccccc}
\noalign{\smallskip }
\hline
\no...
...1 & 14.21 & 5.37 \\
\noalign{\smallskip }
\hline
\end{tabular}\end{displaymath}

 
aHeliocentric radial velocity dThe core radii gLog of core relaxation time at $r_{\rm h}$
bRadial velocity relative to the(LSR) eThe core median radii hCentral surface brightness
cConcentration parameter $[c={\rm log}(r_{\rm t}/r_{\rm c})]$ fLog of relaxation time in years iLog of central luminosity density.

In order to assist the reader, we present in Tables 1, 2 and 3 the basic parameters available for our GGC sample[*].

In Table 1 we give the coordinates, the position, and the metallicity of the clusters: right ascension and declination (epoch J2000, Cols. 3 and 4); Galactic longitude and latitude (Cols. 5 and 6); Heliocentric (Col. 7) and Galactocentric (Col. 8) distances (assuming $R_{\hbox{$\odot$ }}=8.0$ kpc); spatial components (X, Y, Z) (Cols. 9, 10 and 11) in the Sun-centered coordinate system (X pointing toward the Galactic center, Y in direction of Galactic rotation, Z toward North Galactic Pole) and, finally, the metallicity given in Rutledge et al. (1997), on both the Zinn & West (1984) and Carretta & Gratton (1997) scales.

In Table 2, the photometric parameters are given. Col. 3 lists the foreground reddening; Col. 4, the V magnitude level of the horizontal branch; Col. 5, the apparent visual distance modulus; integrated V magnitudes of the clusters are given in Col. 6; Col. 7 gives the absolute visual magnitude. Columns 8 to 11 give the integrated color indices (uncorrected for reddening). Column 12 gives the specific frequency of RR Lyrae variables, while Col. 13 list the horizontal-branch morphological parameter (Lee 1990).

In Table 3, we present the kinematical and structural parameters for the observed clusters. Column 3 gives the heliocentric radial velocity (km s-1) with the observational (internal) uncertainty; Col. 4, the radial velocity relative to the local standard of rest; Col. 5, the concentration parameter ( $c = \log (r_{\rm t}/r_{\rm
c})$); a "c'' denotes a core-collapsed cluster; Cols. 6 and 7, the core and the half mass radii in arcmin; Col. 8, the logarithm of the core relaxation time, in years; and Col. 9 the logarithm of the relaxation time at the half mass radius. Column 10, the central surface brightness in V; and Col. 11, the logarithm of central luminosity density (Solar luminosities per cubic parsec).


next previous
Up: Photometric catalog of nearby clusters

Copyright The European Southern Observatory (ESO)