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J/MNRAS/403/1213   Tracers of stellar mass-loss. I.  (Gonzalez-Lopezlira+, 2010)
Tracers of stellar mass-loss.
I. Optical and near-IR colours and surface brightness fluctuations.
    Gonzalez-Lopezlira R.A., Bruzual-A. G., Charlot S., Ballesteros-Paredes J.,
    Loinard L.
   <Mon. Not. R. Astron. Soc. 403, 1213 (2010)>
   =2010MNRAS.403.1213G
ADC_Keywords: Models, evolutionary ; Stars, late-type ; Mass loss ;
              Photometry, UBVRI ; Photometry, infrared
Keywords: stars: AGB and post-AGB - stars: carbon - stars: mass-loss -
          Magellanic Clouds - infrared: stars - stars: circumstellar matter -
          stars: evolution - galaxies: evolution - galaxies: stellar content

Abstract:
    We present optical and IR integrated colours and SBF magnitudes,
    computed from stellar population synthesis models that include
    emission from the dusty envelopes surrounding TP-AGB stars undergoing
    mass-loss. We explore the effects of varying the mass-loss rate by one
    order of magnitude around the fiducial value, modifying accordingly
    both the stellar parameters and the output spectra of the TP-AGB stars
    plus their dusty envelopes. The models are single burst, and range in
    age from a few Myr to 14Gyr, and in metallicity between Z=0.0001
    and Z=0.07; they combine new calculations for the evolution of stars
    in the TP-AGB phase, with star plus envelope SEDs produced with the
    radiative transfer code DUSTY. We compare these models to optical and
    near-IR data of single AGB stars and Magellanic star clusters. This
    comparison validates the current understanding of the role of
    mass-loss in determining stellar parameters and spectra in the TP-AGB.
    However, neither broad-band colours nor SBF measurements in the
    optical or the near-IR can discern global changes in the mass-loss
    rate of a stellar population. We predict that mid-IR SBF measurements
    can pick out such changes, and actually resolve whether a relation
    between metallicity and mass-loss exists.

Description:
    Table1 contains optical and near-infrared colours of Charlot & Bruzual
    (CB09, 2009, in prep.) models with fiducial mass-loss, but without
    dusty envelopes.
    Table2: same as Table 1, but of models with fiducial mass-loss and
    dusty envelopes.
    Table3 contains surface brightness fluctuation (SBF) amplitudes of
    Charlot & Bruzual (CB09, 2009, in prep.) models with fiducial
    mass-loss but without dusty envelopes.
    Table4: same as Table 3, but of models with dusty envelopes.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        67      342   Colours for CB09 models with fiducial mass-loss
                             but without dusty envelopes
table2.dat        67      342   Colours for CB09 models with fiducial mass-loss
                             and dusty envelopes
table3.dat        77      342   Surface brightness fluctuation (SBF) amplitudes
                             of CB09 models with fiducial mass-loss
                             but without dusty envelopes
table4.dat        77      342   Surface brightness fluctuation (SBF) amplitudes
                             of CB09 models with fiducial mass-loss
                             and dusty envelopes


See also:
          VI/109 : Population Synthesis Models at very low metallicities
                                                               (Schaerer, 2003)
 J/A+A/401/1063  : Evolutionary synthesis models. III. (Anders+, 2003)
 J/ApJS/171/146  : Population synthesis in the blue. IV (Schiavon+, 2007)
 J/MNRAS/387/105 : Isochrone database, single- and binary-star SSPs (Li+, 2008)


Byte-by-byte Description of file: table1.dat table2.dat

   Bytes Format Units   Label     Explanations

   1-  6  F6.4  ---     Z         Initial metallicity
   8- 11  F4.2  ---     Y         Initial helium fraction
  13- 18  F6.3  Gyr     Age       Age
  20- 25  F6.3  mag     V-B       V-B colour index
  27- 32  F6.3  mag     V-R       V-R colour index
  34- 39  F6.3  mag     V-I       V-I colour index
  41- 46  F6.3  mag     V-J       V-J colour index
  48- 53  F6.3  mag     V-H       V-H colour index
  55- 60  F6.3  mag     V-Ks      V-K_s colour index
  62- 67  F6.3  mag     V-K       V-K colour index


Byte-by-byte Description of file: table3.dat table4.dat

   Bytes Format Units   Label     Explanations

   1-  6  F6.4  ---     Z         Initial metallicity
   8- 11  F4.2  ---     Y         Initial helium fraction
  13- 18  F6.3  Gyr     Age       Age
  20- 25  F6.3  mag     Bamp      B band surface brightness fluctuation amplitudes
  27- 32  F6.3  mag     Vamp      V band surface brightness fluctuation amplitudes
  34- 39  F6.3  mag     Ramp      R band surface brightness fluctuation amplitudes
  41- 46  F6.3  mag     Iamp      I band surface brightness fluctuation amplitudes
  48- 53  F6.3  mag     Jamp      J band surface brightness fluctuation amplitudes
  55- 61  F7.3  mag     Hamp      H band surface brightness fluctuation amplitudes
  63- 69  F7.3  mag     Ksamp     Ks band surface brightness fluctuation amplitudes
  71- 77  F7.3  mag     Kamp      K band surface brightness fluctuation amplitudes


Acknowledgements:
    Javier Ballesteros-Paredes, j.ballesteros(at)crya.unam.mx
(End)                                        Patricia Vannier [CDS]  11-Dec-2009