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J/A+A/432/861    Yields of low and intermediate mass stars     (Gavilan+, 2005)
New low and intermediate mass stars yields: The evolution of carbon abundances.
    Gavilan M., Buell J.F., Molla M.
   <Astron. Astrophys. 432, 861 (2005)>
   =2005A&A...432..861G
ADC_Keywords: Models, evolutionary ; Abundances

Keywords: Galaxy: abundances - stars: evolution - galaxies: abundances -
          Galaxy: evolution - galaxies: spiral

Abstract:
    We present a set of low and intermediate mass star yields based on a
    modeling of the TP-AGB phase which affects the production of nitrogen
    and carbon. These yields are evaluated by using them in a Galaxy
    Chemical Evolution model, with which we analyze the evolution of
    carbon abundances. By comparing the results with those obtained with
    other yield sets, and with a large amount of observational data, we
    conclude that the model using these yields combined with those from
    Woosley & Weaver (1995ApJS..101..181W) for massive stars properly
    reproduce all the data. The model reproduces well the increase of C/O
    with increasing O/H abundances. Since these massive star yields do not
    include winds, it implies that these stellar winds might have a
    smoother dependence on metallicity than usually assumed and that a
    significant quantity of carbon proceeds from LIM stars.

Description:
    These tables show the complete content of Table 1 and Table 2 which
    give the production of elements in low and intermediate stars.
    Table 1 give the stellar yields for 5 values of metallicities:
    log(Z/Z☉)=-0.2, -0.1, 0.0, +0.1 and +0.2, and for masses
    from 1 to 8M☉. Table 2 give the ejected mass by the stars
    during their evolution for the same metallicity range. This last one
    is the input file necessary to use in a chemical evolution model and
    it includes the stars up to 100M☉. The ejected masses for
    massive stars (m>8M☉) correspond to the production factors
    given by Woosley & Weaver (1995ApJS..101..181W).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       111      168   Stellar yields for low and intermediate stars
                             (M<8M☉)
table2.dat       149      231  *Ejected mass by stars
                             (0.8M☉≤M*≤100M{sun})

Note on table2.dat: Computed with table1 (M≥8M☉) and
     Woosley & Weaver (1995ApJS..101..181W) (M≥8M☉)


See also:
 J/A+A/299/755  : Stellar evolution. II. Post-AGB (Bloecker+, 1995)
 J/A+A/337/403  : Low-mass stars evolutionary models (Baraffe+ 1998)
 J/A+AS/141/371 : Low-mass stars evolution. tracks + isochrones (Girardi+, 2000)


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

   Bytes Format Units      Label     Explanations

   1-  4  F4.1  Sun        [Fe/H]    Metallicity
   8- 11  F4.2  solMass    Mstar     Stellar Mass
  13- 21  E9.3  solMass    M[H]      Yield of H
  23- 31  E9.3  solMass    M[He]     Yield of 4He
  33- 41  E9.3  solMass    M[C12]    Yield of 12C
  43- 51  E9.3  solMass    M[N14]    Yield of 14N
  53- 61  E9.3  solMass    M[O16]    Yield of 16O
  63- 71  E9.3  solMass    M[C13]    Yield of 13C
  73- 81  E9.3  solMass    M[C12p]   Yield of primary 12C
  83- 91  E9.3  solMass    M[N14p]   Yield of primary 14N
  93-101  E9.3  solMass    M[O16p]   Yield of primary 16O
 103-111  E9.3  solMass    M[C13p]   Yield of primary 13C


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

   Bytes Format Units      Label     Explanations

   1-  6  F6.4  ---        Z         Metallicity as Z (Z☉=0.020)
   8- 13  F6.2  solMass    Mstar     Stellar Mass [0.8M☉-100.0M☉]
  15- 22  E8.3  solMass    Mrmn      Mass of Remnant
  24- 31  E8.3  solMass    H         Ejected Mass in H
  33- 40  E8.3  solMass    4He       Ejected Mass in 4He
  42- 49  E8.3  solMass    12C       Ejected Mass in 12C
  51- 58  E8.3  solMass    13C       Ejected Mass in 13C
  60- 67  E8.3  solMass    14N       Ejected Mass in 14N
  69- 76  E8.3  solMass    13Cs      Ejected Mass in 13C (secondary component)
  78- 85  E8.3  solMass    14Ns      Ejected Mass in 14N (secondary component)
  87- 94  E8.3  solMass    16O       Ejected Mass in 16O
  96-103  E8.3  solMass    20Ne      Ejected Mass in 20Ne
 105-113  E9.3  solMass    24Mg      Ejected Mass in 24Mg
 115-122  E8.3  solMass    28Si      Ejected Mass in 28Si
 124-131  E8.3  solMass    32S       Ejected Mass in 32S
 133-140  E8.3  solMass    40Ca      Ejected Mass in 40Ca
 142-149  E8.3  solMass    56Fe      Ejected Mass in 56Fe


Acknowledgements: Mercedes Molla, mercedes.molla(at)ciemat.es

(End)                                        Patricia Vannier [CDS]  18-Jan-2005