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Theoretical isochrones in the HST/ACS WFC VEGAmag system

The present directory (isoc_acs_wfc) contain the data files for the HST/ACS WFC VEGAmag system. This is a preliminary release, not yet described in papers. Anyway, before downloading, it will be useful to give a look at Paper I:

  • The Electronic paper describing the bolometric corrections: Theoretical isochrones in several photometric systems I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets, by L. Girardi, G. Bertelli, A. Bressan, C. Chiosi, M.A.T. Groenewegen, P. Marigo, B. Salasnich, and A. Weiss, 2002, Astronomy & Astrophysics, 391, 195.
  • The Sirianni et al. (2005) description of the ACS photometric system (including tables with the zeropoints for ABmag and STmag).
  • The Reference table with a summary description of the stellar evolutionary models in use, and their basic references. This allows you to know the differences between the several isochrone files (and better than the minimal table you see below).
  • The readme.txt file (ascii file, 13 Kby), with a field-by-field description of all files in the database.
    • Here you can download the (gzipped) data files:
    Tables of bolometric corrections: [M/H]
    isoc_acs_wfc/bctab_m25.dat.gz -2.5
    isoc_acs_wfc/bctab_m20.dat.gz -2.0
    isoc_acs_wfc/bctab_m15.dat.gz -1.5
    isoc_acs_wfc/bctab_m10.dat.gz -1.0
    isoc_acs_wfc/bctab_m05.dat.gz -0.5
    isoc_acs_wfc/bctab_p00.dat.gz 0.0
    isoc_acs_wfc/bctab_p05.dat.gz +0.5

    Isochrone file: corresponding SSP magnitude file: Z a very minimal description:1
    isoc_acs_wfc/isoc_z0.dat.gz isoc_acs_wfc/sspmag_z0.dat.gz 0 Metal-free models from Ma01.
    isoc_acs_wfc/isoc_z0001.dat.gz isoc_acs_wfc/sspmag_z0001.dat.gz 0.0001 Basic set obtained by combining Gi00+Gi01 (low- and intermediate-mass stars) with Be94+Gi96 (high masses) isochrones. With overshooting. Include a simplified TP-AGB evolution.
    isoc_acs_wfc/isoc_z0004.dat.gz isoc_acs_wfc/sspmag_z0004.dat.gz 0.0004
    isoc_acs_wfc/isoc_z001.dat.gz isoc_acs_wfc/sspmag_z001.dat.gz 0.001
    isoc_acs_wfc/isoc_z004.dat.gz isoc_acs_wfc/sspmag_z004.dat.gz 0.004
    isoc_acs_wfc/isoc_z008.dat.gz isoc_acs_wfc/sspmag_z008.dat.gz 0.008
    isoc_acs_wfc/isoc_z019.dat.gz isoc_acs_wfc/sspmag_z019.dat.gz 0.019
    isoc_acs_wfc/isoc_z030.dat.gz isoc_acs_wfc/sspmag_z030.dat.gz 0.030
    isoc_acs_wfc/isoc_z019nov.dat.gz isoc_acs_wfc/sspmag_z019nov.dat.gz 0.019 Alternative to the basic set, but without overshooting (Gi00).
    isoc_acs_wfc/isoc_z008s.dat.gz isoc_acs_wfc/sspmag_z008s.dat.gz 0.008 Scaled-solar models from Sa00. Both with overshooting and a simplified TP-AGB evolution.
    isoc_acs_wfc/isoc_z019s.dat.gz isoc_acs_wfc/sspmag_z019s.dat.gz 0.019
    isoc_acs_wfc/isoc_z040s.dat.gz isoc_acs_wfc/sspmag_z040s.dat.gz 0.040
    isoc_acs_wfc/isoc_z070s.dat.gz isoc_acs_wfc/sspmag_z070s.dat.gz 0.070
    isoc_acs_wfc/isoc_z008a.dat.gz isoc_acs_wfc/sspmag_z008a.dat.gz 0.008 Alpha-enhanced models from Sa00.
    isoc_acs_wfc/isoc_z019a.dat.gz isoc_acs_wfc/sspmag_z019a.dat.gz 0.019
    isoc_acs_wfc/isoc_z040a.dat.gz isoc_acs_wfc/sspmag_z040a.dat.gz 0.040
    isoc_acs_wfc/isoc_z070a.dat.gz isoc_acs_wfc/sspmag_z070a.dat.gz 0.070
    isoc_acs_wfc/isoc_z004m.dat.gz isoc_acs_wfc/sspmag_z004m.dat.gz 0.004 Alternative to the basic set with overshooting, but including a more detailed TP-AGB evolution (MG01).
    isoc_acs_wfc/isoc_z008m.dat.gz isoc_acs_wfc/sspmag_z008m.dat.gz 0.008
    isoc_acs_wfc/isoc_z019m.dat.gz isoc_acs_wfc/sspmag_z019m.dat.gz 0.019

    1 References: Be94= Bertelli et al. (1994, A&AS 106, 275); Br93= Bressan et al. (1993, A&AS 100, 647); Fa94a = Fagotto et al. (1994a, A&AS 104, 365); Fa94b = Fagotto et al. (1994b, A&AS 105, 29); Gi96 = Girardi et al. (1996, A&AS 117, 113); Gi00 = Girardi et al. (2000, A&AS 141, 371); Gi01 = Girardi (2001, unpublished); Ma01 = Marigo et al. (2001, A&A 371, 152); MG01 = Marigo & Girardi (2001, A&A 377, 132); Sa00 = Salasnich et al. (2000, A&A 361, 1023).