===================================================================
Combined stellar structure and atmosphere models for massive stars: 
  Continuum flux distributions for O stars at Z=0.02 and Z=0.004
===================================================================
       
  CD-ROM files accompaning: 
     Schaerer et al. (1996ab, A&A 310, 837, and A&A 312, 475)
     and Schaerer & de Koter (1997, A&A, 322, 592)

Author: Daniel Schaerer
        Geneva Observatory 
        CH-1290 Sauverny
        Switzerland
Present address:
        Space Telescope Science Institute
        3700 San Martin Drive
        Baltimore, MD 21218
        USA
        e-mail: schaerer@stsci.edu

Modifications:
     	- 25 June 1997: References updated 

*** 1 *** FILES INCLUDED IN THIS "PACKAGE":
 - Sc1_README                 this file
 - Sc1_read_costar.f          sample Fortran file to read CoStar fluxes
Data files:
 - Sc1_costar_z020_lb.fluxes  fluxes for solar metallicity (Z=0.02)
 - Sc1_costar_z004_lb.fluxes  fluxes for 1/5 solar metall. (Z=0.004)

All files are plain ASCII.

*** 2 *** SHORT GENERAL DESCRIPTION:
We provide continuum spectral energy distributions predicted from
the combined stellar structure and atmosphere models for massive 
stars (hereafter called CoStar). The models describe the main 
sequence (MS) evolution along the evolutionary tracks with the 
following initial masses: 20, 25, 40, 60, 85, and 120 Msun. A total 
of 27 models are provided corresponding to 3 to 6 models for each 
track.

A complete list of all models and their parameters is given in the
files (see also Schaerer & de Koter 1997, Table 1).
Here is a summary of the list of the models available for each track:
  track   model#
--------------------------------
  20      A1, A2, A3, A4
  25      B1, B2, B3, B4
  40      C1, C2, C3, C4, C5, C6
  60      D1, D2, D3, D4, D5, D6
  85      E1, E2, E3
 120      F1, F2, F3  

*** 3 *** DETAILED DESCRIPTION OF THE DATA FILES (*.fluxes):
NOTE: 1) The files contain self-explaining information, which is
         partly repeated here.
      2) The EASIEST way to access the data is by using a
         FREE format. All the information given below is 
         NOT NECESSARY then !
--> USE the sample file Sc_read_costar.f to access the data !!!

Content of the *.fluxes files:
------------------------------
Line         1: number of lines in header
                [format (i2)]
Lines  2 -  38: header of the file including references and description
Line        39: n_co=number of models, nw_co=number of wavelength points
                [format (i2,6x,i3))]
Lines 40 -  66: list of all models with stellar parameters 
                NOTE: Models are sorted with increasing effective 
                temperature !
   For each model the following parameters are given:
   model#:	model number as given above
   Minit:       initial mass in solar units
   age:         age in years
   Teff:        effective temperature in Kelvin
   logg:        decadic logarithm of the newtonian acceleration [cgs]
   radius:      stellar radius defined at tau_Ross=20 in solar units
   M:           actual mass in solar unit
   logMdot:     decadic logarithm of mass loss rate in solar mass per year
   vinf:        wind terminal velocity in km per second
   ID:          internal identifier

   [format (a2,6x,f4.0,4x,e7.2,1x,f7.1,1x,f6.1,1x,f7.3,1x,f6.2,3x,
	   f6.3,1x,f7.1,2x,a5)]

Lines 67 - end: Data for individual models
   For the ith (i=1..n_co) model the data is given as follows:
   Line 67+(i-1): nskip=number of lines in short header 
                  [format (i1)]
   Lines 67+(i-1)+nskip
      to 67+(i-1)+nskip+nw_co:
                  wavelength, log10(flux)
                  [format (f12.2,1x,f12.5)]