Open Access
Issue
A&A
Volume 526, February 2011
Article Number A123
Number of page(s) 34
Section Extragalactic astronomy
DOI https://doi.org/10.1051/0004-6361/201015640
Published online 10 January 2011

Online material

Appendix A: Single age simulations diagnostics

This section lists the comparison between the single age simulations and observations for input observed MDF (Table A.1) and for closed box model with a range of yields, and initial/final metallicities (Table A.2). All the simulations that are made using solar scaled isochrones have names starting with “sol*” and those that have alpha enhanced models are named “aen*”. The χ2 goodness of the fit of the full CMD, the V- and I-band LFs as well as the comparison of the number of stars within the RC and AGBb boxes are used as diagnostics of the fit. Those diagnostics that indicate the best fit between the observations and models are indicated in bold faced letters. The bold text refers to the best three models listed in Table 3 and the first part of Table 5.

Table A.1

Diagnostics for all single age simulations with input observed MDF compared to observations.

Table A.2

Diagnostics for all single age simulations with closed box input MDF compared to observations.

Appendix B: Double burst simulations diagnostics

This section lists the comparison between the combined simulations that simulate two burst star formation history. All the single age simulations that are made using solar scaled isochrones have names starting with “sol*” and those that have alpha enhanced models are named “aen*”. The combined simulations have names starting with “cmb*”. The combinations are made by extracting randomly P1 % of stars from simulation 1 (old age) and P2 % of stars from simulation 2 (young age) and verifying that the observed MDF is populated correctly. The input simulations are single age simulations with either input observed MDF (Table A.1) or with closed box model with a range of yields, and initial/final metallicities (Table A.2). All the single age simulations used in input that are made using solar scaled isochrones have names starting with “sol*” and those that have alpha enhanced models are named “aen*”. The χ2 goodness of the fit of the full CMD, the V- and I-band LFs as well as the comparison of the number of stars within the RC and AGBb boxes are used as diagnostics of the fit. Those diagnostics that indicate the best fit between the observations and models are indicated in bold faced letters and correspond to the best three models reported in the second part of Table 5 and in Table 4.

Table B.1

Diagnostics for all 2-burst simulations composed by combining two single age simulations with input observed MDF compared to observations.

Table B.2

Diagnostics for all 2-burst simulations with input closed box MDF compared to observations.


© ESO, 2011

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