VII/151 Structure Parameters of Galactic Globular Clusters (Webbink 1985)
Structure Parameters of galactic Globular Clusters
Webbink, R.F.
<IAU Symp 113 "Dynamics of Star Clusters",
Ed. J. Goedman & P. Hut, 541 (1985)>
ADC_Keywords: Clusters, globular ; Magnitudes
Description:
This catalog contains observed and derived structure parameters for
154 galactic globular clusters, 7 dwarf spheroidal satellites of the
Galaxy, and 6 globular clusters in the Fornax dwarf spheroids,
respectively, in six different files. Files 1-3 (table1a, table1b, &
table1c) list observed parameters, including cluster designation in
order of right ascension, equatorial coordinates (B1950), apparent
level of the cluster horizontal branch, reddening, subgiant branch
color, limiting and core angular radii, ellipticities (only for
table1b), integrated magnitude and central surface brightness. Files
4-6 (table2a, table2b, & table2c) contain positional and structural
data derived from the observational data of table1. These include,
for instance, galactic and galactocentric or Cartesian coordinates,
heliocentric and galactocentric distances, or angular and projected
linear distances, position angle, metallicity, limiting and core
radii, central relaxation time scale, central mass density, central
velocity dispersion, and central escape velocity.
The references (all columns which label start by r_) are not
available in electronic form.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 172 154 Observed Galactic Clusters
table1b.dat 172 7 Observed Galactic Dwarf Spheroidals
table1c.dat 172 6 Observed Fornax Globular Clusters
table2a.dat 155 154 Derived Galactic Clusters
table2b.dat 155 7 Derived Galactic Dwarf Spheroidals
table2c.dat 155 6 Derived Fornax Globular Clusters
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See also:
VII/13 : Globular Cluster Catalogue (Arp 1965)
VII/103 : Catalogue of Galactic Globular Clusters (Monella, 1985)
Byte-per-byte Description of file: table1a.dat table1b.dat table1c.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- IAU Cluster designation
11- 23 A13 --- Name1 Cluster name
25- 32 A8 --- Name2 Cluster name
35- 36 I2 h RAh Right ascension 1950
38- 39 I2 min RAm Right ascension 1950
41- 42 I2 s RAs Right ascension 1950
45 A1 --- DE- Declination 1950 sign
46- 47 I2 deg DEd Declination 1950
49- 52 F4.1 arcmin DEm Declination 1950
55- 59 F5.2 mag VHB ? Apparent level of the cluster
horizontal branch
60 A1 --- u_VHB Uncertainty flag (:) on VHB
62- 63 A2 --- m_VHB Method used for the determination of VHB (1)
66- 68 A3 --- r_VHB Reference of VHB determination
70 A1 --- l_EBV [>] Limit flag for EBV
71- 75 F5.3 mag EBV Color excess E(B-V)
76 A1 --- u_EBV Uncertainty flag (:) on EBV
77- 79 A3 --- m_EBV Method used for the determination of EBV (2)
81- 83 A3 --- r_EBV Reference for EBV determination
85- 88 F4.2 mag BVg ?observed color of the cluster subgiant branch
89 A1 --- u_BVg Uncertainty flag (:) on BVg
92- 93 A2 --- m_BVg Method for the determination of BVg (3)
96- 98 A3 --- r_BVg Reference for BVg determination
101-106 F6.3 arcmin lgtt ?log(radius) expressed in arcmin
107-108 A2 --- u_lgtt [: ] Uncertainty flag (:) on lgtt
109-110 A2 --- m_lgtt Method for the determination of lgtt (4)
114-116 A3 --- r_lgtt Reference for lgtt determination
119-123 F5.2 arcmin lgtc ?log(core radius) expressed in arcmin
124 A1 --- u_lgtc Uncertainty flag (:) on lgtc
126-127 A2 --- m_lgtc Method for the determination of lgtc (4)
130-132 A3 --- r_lgtc Reference for lgtc determination
134-137 F4.2 --- eps ]0/1]? Ellipticity (5)
139-143 F5.2 mag Vt ?Integrated V magnitude
144 A1 --- u_Vt Uncertainty flag (: or )) on Vt
146-148 A3 --- m_Vt Method for the determination of Vt (6)
150-152 A3 --- r_Vt Reference for Vt determination
156 A1 --- l_Sc [<] Limit flag for Sc
157-161 F5.2 mag/arcmin2 Sc ? Central surface brightness
162 A1 --- u_Sc [:)] Uncertainty flag (: or )) on Sc
165-167 A3 --- m_Sc Method for the determination of Vt and Sc (6)
170-172 A3 --- r_Sc Reference for the determination of Vt and Sc
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Note (1): the method is coded as follows:
CM = color-magnitude diagram (± 0.05)
RR = mean magnitudes of RR Lyr variable (± 0.1)
BG = magnitudes of the brightest giants (± 0.3)
IR = combination of the index of richness, integrated apparent
magnitude, estimated foreground reddening (± 0.6)
A = foreground reddening plus assumed reddening law (± 1.4)
Note (2): the method is coded as follows:
HB = two-color diagram of blue horizontal branch (HB) stars
NB = narrow-band photometry and spectroscopy of HB stars fit to
model atmospheres
B = color-magnitude diagram of blue HB stars fit to a fiducial curve
rr = Sturch's method using RR Lyr colors at minimum
RR = mean RR Lyr colors
psi = slope of red continuum of individual giants
DU = correlation of UV excesses of giant stars
UB = asymptotic reddening of foreground stars in UBV
uy = asymptotic reddening of foreground stars in uvby
XY = asymptotic reddening of foreground stars in Vilnius photometry
GB = blue edge of RR Lyr gap
RD = red edge of RR Lyr gap
CS = integrated optical or near-UV colors
IR = integrated IR colors
MI = correlation of metallicity index with integrated color
HI = neutral Hydrogen column density plus galaxy counts
CX = modified cosecant law
Note (3): the method is coded as follows:
CM = color-magnitude diagram
DP = period difference of RR Lyr variables
DS = cluster metallicity in individual RR Lyr
UB = integrated UBV colors
Q = line blanketing index from integrated narrow-band photometry
BV = integrated BV colors
Note (4): the method is coded as follows:
SC = star counts
SP = surface photometry
AP = concentric aperture photometry
D = correlation of apparent diameter with limiting radius
e = eye estimate of the corde radius
Note (5): the ellipticity only exists for table1b;
methods and references for its determination are identical to
the radius determinations lgtt and lgtc
Note (6): the method is coded as follows:
AP = concentric aperture photometry
SP = surface photometry
Sig = summation
R = fit of the upper end of LF
IR = index of richness
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Byte-per-byte Description of file: table2a.dat table2b.dat table2c.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- IAU Cluster designation
11- 23 A13 --- Name1 Cluster name
25- 32 A8 --- Name2 Cluster name
35- 41 F7.3 deg GLON Galactic longitude
45- 51 F7.3 deg GLAT Galactic latitude
55- 59 F5.1 kpc Rdist ?Heliocentric distance
61- 66 F6.1 kpc Xdist ?Galactocentric distance
68- 73 F6.1 kpc Ydist ?Galactocentric distance
75- 80 F6.1 kpc Zdist ?Galactocentric distance
81- 86 F6.1 kpc rGC ?Galactocentric distance
88 A1 --- l_[m/H] Limit on [m/H]
89- 93 F5.2 Sun [m/H] ?log(metallicity) relative to Sun
96-101 F6.2 mag Mv ?Integrated absolute magnitude of the cluster
103 A1 --- l_rc [<] Limit flag on rc
104-109 F6.2 pc rc ?Core radius
113-118 F6.1 pc rt ?Limiting radius
121-125 F5.2 --- c ? Core Concentration parameter = log(rt/rc)
127 A1 --- l_lg.tr [<] Limit flag on lg.tr
128-133 F6.3 yr lg.tr ?log of central relaxation time (yr)
136 A1 --- l_lg.rho Limit flag on lg.rho
137-142 F6.3 solMass/pc3 lg.rho ?log of central mass density (solar masses
per cubic parsec)
144 A1 --- l_s0 Limit flag on s0
145-149 F5.2 km/s s0 ?Central velocity dispersion
150 A1 --- l_Vesc Limit flag on Vesc
151-155 F5.1 km/s Vesc ?Central escape velocity
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Historical Notes:
* 12-Jan-1993: The catalogue was prepared at CDS (M.J. Wagner) from
the printed catalogue.
* 22-Aug-1996: Documentation and files converted to CDS Standards
(End) Francois Ochsenbein [CDS] 22-Aug-1996