Kataloge

Aquarius / Milky Way Globular Clusters

«A Catalog of Parameters for Globular Clusters in the Milky Way» William E. Harris, 1996 [148]
ID Name RA Dec RSun RGC Fe/H wt EB-V VHB (m-M)V Vt MV,t U-B B-V V-R V-I spt ellip vr vLSR sigv c rc rh μV ρ0 lg(tc) lg(th)
NGC 6981 M 72 20 53 27.70 -12 32 14.3 17.0 12.9 -1.42 4 0.05 16.90 16.31 9.27 -7.04 0.14 0.72 0.45 0.94 F7 0.02 -345.0 ± 3.7 -336.2 1.21 0.46 0.93 19.02 2.38 8.72 9.23
NGC 7089 M 2 21 33 27.02 -00 49 23.7 11.5 10.4 -1.65 5 0.06 16.05 15.50 6.47 -9.03 0.09 0.66 0.46 0.92 F4 0.11 -5.3 ± 2.0 3.8 8.2 ± 0.6 1.59 0.32 1.06 15.78 4.00 8.48 9.40
NGC 7492 23 08 26.63 -15 36 41.4 26.3 25.3 -1.78 5 0.00 17.63 17.10 11.29 -5.81 0.23 0.42 0.24 -177.5 ± 0.6 -176.2 1.2 ± 1.0 0.72 0.86 1.15 20.68 1.27 9.60 9.44

Legend

Key to columns [148]
ID Cluster identification number
Name Other commonly used cluster name
RA Right ascension (epoch J2000)
Dec Declination (epoch J2000)
RSun Distance from Sun (kiloparsecs)
RGC Distance from Galactic center (kpc), assuming R_0=8.0 kpc
Fe/H Metallicity [Fe/H]
wt Weight of mean metallicity; essentially the number of independent [Fe/H] measurements averaged together.
EB-V Foreground reddening
VHB V magnitude level of the horizontal branch (or RR Lyraes)
(m-M)V Apparent visual distance modulus
Vt Integrated V magnitude of the cluster
MV,t Absolute visual magnitude (cluster luminosity), M_V,t = V_t - (m-M)V
U-B Integrated color indices (uncorrected for reddening)
B-V Integrated color indices (uncorrected for reddening)
V-R Integrated color indices (uncorrected for reddening)
V-I Integrated color indices (uncorrected for reddening)
spt Spectral type of the integrated cluster light
ellip Projected ellipticity of isophotes, e = 1-(b/a)
vr Heliocentric radial velocity (km/s)
vLSR Radial velocity relative to Solar neighborhood LSR
sigv Central velocity dispersion sig_v (km/s)
c King-model central concentration, c = log(r_t/r_c); a 'c' denotes a core-collapsed cluster
rc Core radius in arcmin
rh Half-light radius in arcmin
μV Central surface brightness, V magnitudes per square arcsecond
ρ0 Central luminosity density, log_10(Solar luminosities per cubic parsec)
lg(tc) Core relaxation time t(r_c), in log_10(years)
lg(th) Median relaxation time t(r_h), in log_10(years)

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