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VI/70 Galaxy Isochrone Synthesis Spectral Evolution Library (Bruzual+ 1993)
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Galaxy Isochrone Synthesis Spectral Evolution Library
Bruzual G.A., Charlot S.
<Astrophys. J. 405, 538 (1993)>
=1993ApJ...405..538B
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ADC_Keywords: Galaxies, spectra ; Galaxies, models
Keywords: Evolution
Description:
The models in this catalog were produced by spectral synthesis
of stellar energy distributions for various initial mass
functions and several functions for the star formation rate.
The resulting models are the spectral evolution of a galaxy
over gigayears of time.
This catalog contains the files computed with the Bruzual
and Charlot (1993) Isochrone Synthesis Spectral Evolutionary
Code. This set of models will be referred to as the Galaxy
Isochrone Synthesis Spectral Evolution Library (GISSEL,
Bruzual and Charlot 1993).
The original tar file distribution by Bruzual is the basis
for this catalog. The binary Spectral Energy Distribution (S.E.D.)
files have been converted to fits by the ADC.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file (based on README in original)
sspms1.fit 2880 392 Simple Stellar Population Spectral En Distrib
sspms11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspms12c.dat 130 220 colors
sspms13c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspms14c.dat 76 220 evolutionary flux, supernova & PN rates
sspms2.fit 2880 392 Simple Stellar Population S.E.D.
sspms21c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspms22c.dat 130 220 colors
sspms23c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspms24c.dat 76 220 evolutionary flux, supernova & PN rates
sspms3.fit 2880 392 Simple Stellar Population S.E.D.
sspms31c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspms32c.dat 130 220 colors
sspms33c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspms34c.dat 76 220 evolutionary flux, supernova & PN rates
sspms42.fit 2880 392 Simple Stellar Population S.E.D.
sspms41c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspms42c.dat 130 220 colors
sspms43c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspms44c.dat 76 220 evolutionary flux, supernova & PN rates
sspms5.fit 2880 392 Simple Stellar Population S.E.D.
sspms51c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspms52c.dat 130 220 colors
sspms53c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspms54c.dat 76 220 evolutionary flux, supernova & PN rates
sspsc1.fit 2880 392 Simple Stellar Population S.E.D.
sspsc11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsc12c.dat 130 220 colors
sspsc13c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsc14c.dat 76 220 evolutionary flux, supernova & PN rates
sspsc2.fit 2880 392 Simple Stellar Population S.E.D.
sspsc21c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsc22c.dat 130 220 colors
sspsc23c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsc24c.dat 76 220 evolutionary flux, supernova & PN rates
sspsc3.fit 2880 392 Simple Stellar Population S.E.D.
sspsc31c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsc32c.dat 130 220 colors
sspsc33c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsc34c.dat 76 220 evolutionary flux, supernova & PN rates
sspsc4.fit 2880 392 Simple Stellar Population S.E.D.
sspsc41c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsc42c.dat 130 220 colors
sspsc43c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsc44c.dat 76 220 evolutionary flux, supernova & PN rates
sspsc5.fit 2880 392 Simple Stellar Population S.E.D.
sspsc51c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsc52c.dat 130 220 colors
sspsc53c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsc54c.dat 76 220 evolutionary flux, supernova & PN rates
sspsp1.fit 2880 392 Simple Stellar Population S.E.D.
sspsp11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsp12c.dat 130 220 colors
sspsp13c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsp14c.dat 76 220 evolutionary flux, supernova & PN rates
sspsp2.fit 2880 392 Simple Stellar Population S.E.D.
sspsp21c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsp22c.dat 130 220 colors
sspsp23c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsp24c.dat 76 220 evolutionary flux, supernova & PN rates
sspsp3.fit 2880 392 Simple Stellar Population S.E.D.
sspsp31c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsp32c.dat 130 220 colors
sspsp33c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsp34c.dat 76 220 evolutionary flux, supernova & PN rates
sspsp4.fit 2880 392 Simple Stellar Population S.E.D.
sspsp41c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsp42c.dat 130 220 colors
sspsp43c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsp44c.dat 76 220 evolutionary flux, supernova & PN rates
sspsp5.fit 2880 392 Simple Stellar Population S.E.D.
sspsp51c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
sspsp52c.dat 130 220 colors
sspsp53c.dat 130 220 mass-light ratio, mass in stars & gas, Ly, Mg2
sspsp54c.dat 76 220 evolutionary flux, supernova & PN rates
1gysp1.fit 2880 392 Composite Stellar Population S.E.D.
1gysp11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
1gysp12c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
1gysp13c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
1gysp14c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
consp1.fit 2880 392 Composite Stellar Population S.E.D.
consp11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
consp12c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
consp13c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
consp14c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
m50sp1.fit 2880 392 *Composite Stellar Population S.E.D.
m50sp11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
m50sp12c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
m50sp13c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
m50sp14c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
ta1sp1.fit 2880 392 Composite Stellar Population S.E.D.
ta1sp11c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
ta1sp12c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
ta1sp13c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
ta1sp14c.dat 120 220 Mbol, UBV, K, V colors, Lyman & 400nm jump
allcol.hds 133 2100 Concatenated original headers of *?c.dat files
which list model parameters
filters.res 78 3698 many filter bandpasses of color systems used
filt_res.dat 100 3698 reformatted filters.res
filters.log 82 85 listing of filter / color systems
a0vkurbb.dat 21 3303 *Kurucz (1979) model for Alpha Lyrae.
readised.f 70 219 SUN fortran 77 code for reading *.ised files
csp.f 124 1317 SUN fortran 77 code for composite stellar
population models
multicol.f 124 969 SUN fortran 77 code computes colors and
magnitudes as a function of redshift taking
into account galaxy evolution
isedfits.f 80 679 SUN fortran 77 code to convert *.ised files to
FITS using the FITSIO library
gissel.tar 0 91193 the original tar file from Bruzual
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Note on m50sp1.fit:
During the creation of this file the tau parameter read by the
conversion program ised_to_fits.f was passed with value zero.
This is contrary to the value of mu=50 and had to be ignored
for the creation of this file. A possible error may exist that
caused this discrepance and was not recognized at this time.
See the allcol.hds file for the values given by the authors.
Note on a0vkurbb.dat:
9400K BB interpolation 1.8-200 microns extended to IR (A0V_KUR_BB.SED)
Software and Model files:
The files are both completed models and programs that run on a SUN
workstation under SunOS f77 as explained below. These programs allow
the astronomer to calculate his/her own composite stellar population
models, colors and magnitudes as a function of redshift taking into
account galaxy evolution. The program isedfits.f can convert the binary
data files *.ised into FITS and needs FITSIO library routines.
The *.ised files are binary files in the original distribution.
Filenaming convention:
The name of each file is coded according to the parameters
used to build the model as follows:
ssp = simple stellar population (= instantaneous burst)
1gy = burst of star formation lasting from t=0 to t=1 Gyr
con = constant star formation rate = 1.000E-10 Mo/yr
tan = exponentially decreasing star formation rate (BC93, eq. 2),
where n = e-folding time in Gyr. (1 => 1 Gyr).
No gas recycling is assumed.
mn = exponentially decreasing star formation rate (BC93, eq. 2),
where n = Bruzual (1983) mu parameter (50 => mu = 0.50).
Gas recycling is assumed.
sp = Salpeter (1955) Initial Mass Function (IMF)
sc = Scalo (1986) IMF
ms = Miller & Scalo (1979) IMF
IMF: Lower mass limit, Upper mass limit
1 = 0.1 125 Mo
2 = 0.1 65 Mo
3 = 0.1 30 Mo
4 = 0.1 2.5 Mo
5 = 2.5 125 Mo
In all cases:
1 Mo = Total mass of the model galaxy, except for the
case of the constant SFR in which the total mass
increases with time.
Bruzual's original tar file names exceeded 8 characters and some
had file name extensions longer than 3 characters. The names in
this distribution have been shortened trying to maintain as much
of the original naming convention as possible.
File contents:
Each *.fit file contains 221 s.e.d.'s covering the wavelength
range from 5 A to 100 microns in 1206 steps corresponding to
221 time steps from 0 to 20 Gyr. The s.e.d.'s are given in
units of Solar_Luminosity/Angstrom, i.e. by multiplying the
listed fluxes by 3.826E33 erg/s, the fluxes are transformed
to erg/s/A. Since the models are normalized to 1 Mo total
mass, the fluxes should be scaled according to the desired
galaxy mass. The FITS files have four extensions. The main
data are the s.e.d.'s followed by the wavelength scale, time-
dependent quantities, including the time scale, and the IMF used.
In addition, for each *.fit file, there are 4 files
named *1c.dat, *2c.dat, *3c.dat, and *4c.dat which list
several rest frame properties of the model as a function of
time. The original headers have been stripped off and concatenated
into file allcol.hds.
Model Rest-frame Colors, Magnitudes and other Properties:
The *?c.dat files list the following quantities as a function of
age measured in the rest frame of the model galaxy. The number
given in parentheses represent the number of the filter in the
sequential lists given in files filters.log and filters.res. The
latter contains the filters response functions used by the
authors. The zero points of these colors have been computed by
requiring that the respective color of the Kurucz (1979) model
for alpha Lyrae (extended to the IR) be = 0. The Kurucz model is
listed in file a0vkurbb.dat. These files are provided so that the
interested user can compare his/her own derivation of the model
colors with the results of BC93.
The composite stellar populations are computed by a straight
forward application of the convolution integral given in
equation (1) of BC93. When performing this integral, caution
must be taken to insure that the model spectral energy
distributions are interpolated at all ages which are relevant
for the star formation rate in use (e.g. burst of star formation
lasting for 1.5 Gyr, step which is not included in our grid).
See also:
ftp://legacy.gsfc.nasa.gov/software/fitsio : FITSIO distribution
ftp://urania.astroscu.unam.mx/gissel/ : Bruzual's tar file distribution
username and password required
Byte-by-byte Description of file: *1c.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 yr log(age) model age
13- 20 F8.4 mag/solMass Mbol Bolometric mag per 1 Mo galaxy
23- 30 F8.4 mag/solMass U *U (12) magnitude per 1 Mo galaxy
33- 40 F8.4 mag/solMass B *B (14) magnitude per 1 Mo galaxy
43- 50 F8.4 mag/solMass V *V (15) mag per 1 Mo galaxy
53- 60 F8.4 mag/solMass K *K (57) mag per 1 Mo galaxy
63- 70 F8.4 mag/solMass 14-V *1400 (22) - V (15) color
73- 80 F8.4 mag/solMass 17-V *1700 (23) - V (15) color
83- 90 F8.4 mag/solMass 22-V *2200 (24) - V (15) color
93-100 F8.4 mag/solMass 27-V *2700 (25) - V (15) color
101-110 F10.4 mag B(912) Amplitude of Lyman discontinuity
113-120 F8.4 mag B(4000) Amplitude of the 4000 A break
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Note on U,B,V,K,14-V,17-V,22-V,27-V:
The numbers between brackets refer to the filters listed in files
filters.log and filters.res. The latter contains the filter response
functions used here. The same convention applied to the tables below.
Byte-by-byte Description of file: *2c.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 yr log(age) model age
13- 20 F8.4 mag U-J U-J color -- U-J = U+ (1) - J+ (2) color
23- 30 F8.4 mag J-F J-F color -- J-F = J+ (2) - F+ (3) color
33- 40 F8.4 mag F-N F-N color -- F-N = F+ (3) - N+ (4) color
43- 50 F8.4 mag U-B U-B color -- U-B = U (12) - B (13) color
53- 60 F8.4 mag B-V B-V color -- B-V = B (14) - B (15) color
63- 70 F8.4 mag V-R V-R color -- V-R = V (15) - R (32) color
73- 80 F8.4 mag V-I V-I color -- V-I = V (15) - I (33) color
83- 90 F8.4 mag V-J V-J color -- V-J = V (15) - J (34) color
93-100 F8.4 mag V-K V-K color -- V-K = V (15) - K (57) color
103-110 F8.4 mag R-I R-I color -- R-I = R (32) - I (33) color
113-120 F8.4 mag J-H J-H color -- J-H = J (55) - H (56) color
123-130 F8.4 mag H-K H-K color -- H-K = H (56) - K (57) color
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Byte-by-byte Description of file: *3c.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 yr log(age) model age
13- 20 F8.4 mag/solMass Mbol Bolometric magnitude per 1 Mo galaxy
23- 30 F8.4 mag/solMass V Vmag/Mo = V(15) magnitude per 1 Mo galaxy
32- 44 E13.6 solMass/mag M/Lb Mass to B (14) light ratio
46- 58 E13.6 solMass/mag M/Lv Mass to V (15) light ratio
60- 72 E13.6 solMass Mstars total mass in stars at this age
74- 86 E13.6 solMass Mgas mass left in gas at this age
88-100 E13.6 solMass/yr SFR star formation rate
103-110 F8.4 --- NLyc/Mo log of number of Ly continuum photons per
1 Mo galaxy
113-120 F8.2 --- EW(Lya) Lyman alpha equivalent width
123-130 F8.4 --- Mg2 magnesium 2 index
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Byte-by-byte Description of file: *4c.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 yr log(age) model age
13- 20 F8.4 mag/solMass Mbol bolometric magnitude per 1 Msun galaxy
22- 34 E13.6 yr-1 b(t) evolutionary flux b(t) stars per year
(Renzini and Buzzoni 1986)
36- 48 E13.6 yr-1/solLum B(t) specific evolutionary flux B(t)/yr/Lsun
(Renzini and Buzzoni 1986)
50- 62 E13.6 yr-1/solLum SNR supernova rate (per year and solar
luminosity)
64- 76 E13.6 yr-1/solLum PNBR planetary nebula birth rate (/yr/Lo)
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Byte-by-byte Description of file: a0vkurbb.dat
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Bytes Format Units Label Explanations
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1- 8 F8.0 nm lambda wavelength
10- 21 E12.6 --- F flux in unspecified units
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Byte-by-byte Description of file: filt_res.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- No_filter ?Number of points in next filter
7- 9 I3 --- pix ?filter pixel number
11- 21 A11 0.1nm lambda ?wavelength (F11.2 and E11.5 mixed)
26- 33 F8.5 --- T ?filter transmission
37-100 A64 --- filter name of next filter
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Byte-by-byte Description of file: filters.log
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Bytes Format Units Label Explanations
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9- 10 I2 --- ID filter ID
12- 75 A64 --- Ref filter reference
80- 82 I3 --- r_Ref code for reference - not supplied
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Initial Mass Function:
For the convenience of the general user, the parametric expression
used for the different IMF's are given below. The constant c refers
to the normalization constant which appears in f(m)=c/m**(1+x).
The values of c listed below for each segment insure the normalization
(total mass = 1 Mo) and continuity of the IMF. These values are given
for the case of Mu = 125 Mo. Equivalent values for other values of
Mu are listed in the header of the respective files.
Salpeter (1955) IMF (1 segment):
mass number
x from m to m fraction of stars c
1.35 0.10 125.00 1.0000 2.8253 1.7038E-01
totals 1.0000 2.8253 0.3539 Mo/star
Scalo (1986) IMF (6 segments):
mass number
x from m to m fraction of stars c
-2.60 0.10 0.18 0.0512 0.3506 1.0053E+02
0.01 0.18 0.42 0.2780 0.9822 1.1443E+00
1.75 0.42 0.62 0.1637 0.3260 2.5293E-01
1.08 0.62 1.18 0.2271 0.2708 3.4842E-01
2.50 1.18 3.50 0.1844 0.1089 4.4073E-01
1.63 3.50 125.00 0.0956 0.0118 1.4819E-01
totals 1.0000 2.0502 0.4878 Mo/star
Miller & Scalo (1979) IMF ( 4 segments):
mass number
x from m to m fraction of stars c
0.25 0.10 1.00 0.3112 0.8837 2.8387E-01
1.00 1.00 2.00 0.1968 0.1419 2.8387E-01
1.30 2.00 10.00 0.3624 0.0957 3.4948E-01
2.30 10.00 125.00 0.1297 0.0076 3.4948E+00
totals 1.0000 1.1289 0.8858 Mo/star
Composite Stellar Populations:
The sample program csp.f is provided so that the user can
produce his/her own CSP models from the SSP models included
in GISSEL. The program csp should compile with no problem
under SunOS f77 using the following options:
host% f77 -O -Nl150 -e -sun4 -o csp csp.f
producing the following output:
csp.f
MAIN csp:
copyright:
sfr_0:
sfr:
name_sed:
convolve_sed:
convol:
convol2:
chaext:
file_header:
sfr_exp_rec:
dattim:
rf_color:
filter:
color:
zerop:
filter0:
BLOCK DATA filter_0:
clyman:
b4000:
b912:
ymag2:
linear:
iplace:
trapz1:
zx:
t:
locate:
Note that the original filenames from the authors were shortened,
e.g., ssp_ms_1.1color --> sspms11c.dat
ssp_ms_4.2color --> sspms42c.dat etc.
The program multicolor.f computes colors and magnitudes as a
function of redshift taking into account galaxy evolution.
The program multicolor should compile with no problem under
SunOS f77 using the following options:
host% f77 -O -Nl150 -e -sun4 -o multicolor multicolor.f
producing the following output:
multicolor.f:
MAIN multicolor:
read_ascii:
read_ised:
read_gsed:
chaext:
nread:
entry qread:
zx:
t:
rminim:
file_header:
dattim:
evol_ised:
z_color:
filter:
color:
zerop:
filter0:
BLOCK DATA filter_0:
linear:
iplace:
trapz1:
sort:
dsort:
dismod:
The *.ised files have been removed from the ADC distribution since
they were only easily readable on the Sun workstation.
Remarks:
The original documentation file was last updated by G. Bruzual on
Tuesday October 27th, 1992.
The files *5?c.dat had in the data words like inf and NaN embedded.
Lines 156, 158, 160-220 were deleted to remove those from the data.
The headers and tables were separated in files *.?color --> *?c.dat
The concatenated headers are in allcol.hds.
Please send any comments to any or all of these:
gbruzual@conicit.ve
bruzual@igc.org
emsca!cida!bruzual@sun.com
References:
Bruzual, G.B and Charlot, S., 1993, ApJ, 405, 538, hereafter BC93
=1993APJ...405..538B
Miller and Scalo, 1979
Salpeter, E.E., 1955, ApJ 121, 161 =1955APJ...121..161S
Scalo, 1986
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(End) Paul Kuin 1-JULY-1996