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J/A+A/462/107  Simulations of metal-poor star clusters    (Fagiolini+, 2007)

Monte Carlo simulations of metal-poor star clusters. Fagiolini M., Raimondo G., Degl'Innocenti S. <Astron. Astrophys. 462, 107 (2007)> =2007A&A...462..107F
ADC_Keywords: Clusters, globular ; Models, evolutionary ; Photometry Keywords: stars: evolution - Galaxy: globular clusters: general - galaxies: star clusters Abstract: The intrinsic uncertainty (due to statistical effects) affecting the integrated colours and mass-to-light ratios as a function of the cluster's integrated visual magnitude (MVtot^_) is studied. We investigate the case of metal-poor, single-burst stellar populations with age from a few million years to a likely upper value for the Galactic globular cluster ages. Monte Carlo techniques are used for randomly generating stars distributed according to the cluster's mass function. Integrated colours and mass-to-light ratios in different photometric bands are presented as a function of age for different assumptions on the cluster total V magnitude and they are checked for good agreement with the observational values of low-metallicity Galactic clusters. Description: Table 2 and table 3 list integrated colours in the standard photometric and HST bands respectively. Table 6 lists the mass-too-light ratios in the standard photometric system and in solar units. All tables contain models computed for different assumptions of the exponent of the initial mass function in the proper mass interval (see the paper for more details). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 98 189 Integrated colours in the standard photometric system table3.dat 79 162 Integrated colours in the HST filters table6.dat 112 297 Mass-to-light ratios in the standard photometric system and in solar units
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 mag VMAG Model absolute V magnitude value (1) 4- 6 F3.1 --- alpha Model alpha value (IMF exponent) (1) 8- 14 F7.1 Myr Age Age of the Simple Stellar Population (SSP) 15- 20 F6.2 mag Vmag Integrated V magnitude 21- 26 F6.2 mag e_Vmag 1 sigma error on Vmag 27- 32 F6.2 mag U-B Integrated U-B color 33- 38 F6.2 mag e_U-B 1 sigma error on U-B 39- 44 F6.2 mag B-V Integrated B-V color 45- 50 F6.2 mag e_B-V 1 sigma error on B-V 51- 56 F6.2 mag V-R Integrated V-R color 57- 62 F6.2 mag e_V-R 1 sigma error on V-R 63- 68 F6.2 mag V-I Integrated V-I color 69- 74 F6.2 mag e_V-I 1 sigma error on V-I 75- 80 F6.2 mag V-J Integrated V-J color 81- 86 F6.2 mag e_V-J 1 sigma error on V-J 87- 92 F6.2 mag V-K Integrated V-K color 93- 98 F6.2 mag e_V-K 1 sigma error on V-K
Note (1): Models [VMAG, alpha] are: [-4 2.0], [-4 2.3], [-4 2.6], [-6 2.3], [-8 2.0], [-8 2.3], [-8 2.6]
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 mag VMAG Model absolute V magnitude value (1) 4- 6 F3.1 --- alpha Model alpha value (IMF exponent) (1) 8- 14 F7.1 Myr Age Age of the Simple Stellar Population (SSP) 16- 21 F6.3 mag VF439W(2) Integrated V-F439W(2) color 23- 27 F5.3 mag e_VF439W(2) 1 sigma error on VF439W(2) color 29- 34 F6.3 mag VF555W(2) Integrated V-F555W(2) color 36- 40 F5.3 mag e_VF555W(2) 1 sigma error on VF555W(2) color 42- 47 F6.3 mag VF814W(2) Integrated V-F814W(2) color 49- 53 F5.3 mag e_VF814W(2) 1 sigma error on VF814W(2) color 55- 60 F6.3 mag VF110W(1) Integrated V-F110W(1) color 62- 66 F5.3 mag e_VF110W(1) 1 sigma error on VF110W(1) color 68- 73 F6.3 mag VF160W(1) Integrated V-F160W(1) color 75- 79 F5.3 mag e_VF160W(1) 1 sigma error on VF160W(1) color
Note (1): Models [VMAG, alpha] are: [-4 2.0], [-4 2.3], [-4 2.6], [-8 2.0], [-8 2.3], [-8 2.6]
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 2 I2 mag VMAG Model absolute V magnitude value (1) 4- 6 F3.1 --- alpha Model alpha value (IMF exponent) (1) 8- 14 F7.1 Myr Age Age of the Simple Stellar Population (SSP) 16- 21 F6.3 Sun M/LV Mass-to-light ratio in the V-band 24- 28 F5.3 Sun e_M/LV 1 sigma error on Vmag 30- 35 F6.3 Sun M/LU Mass-to-light ratio in the U-band 38- 42 F5.3 Sun e_M/LU 1 sigma error on Umag 44- 49 F6.3 Sun M/LB Mass-to-light ratio in the B-band 52- 56 F5.3 Sun e_M/LB 1 sigma error on Bmag 58- 63 F6.3 Sun M/LR Mass-to-light ratio in the R-band 66- 70 F5.3 Sun e_M/LR 1 sigma error on Rmag 72- 77 F6.3 Sun M/LI Mass-to-light ratio in the I-band 80- 84 F5.3 Sun e_M/LI 1 sigma error on Imag 86- 91 F6.3 Sun M/LJ Mass-to-light ratio in the J-band 94- 98 F5.3 Sun e_M/LJ 1 sigma error on Jmag 100-105 F6.3 Sun M/LK Mass-to-light ratio in the K-band 108-112 F5.3 Sun e_M/LK 1 sigma error on Kmag
Note (1): Models [VMAG, alpha] are: [-4 0.8], [-4 1.8], [-4 2.0], [-4 2.3], [-4 2.6], [-6 2.0], [-8 0.8], [-8 1.8], [-8 2.0], [-8 2.3], [-8 2.6]
Acknowledgements: Gabriella Raimondo, raimondo(at)oa-teramo.inaf.it
(End) Gabriella Raimondo [INAF-OATeramo], Patricia Vannier [CDS] 31-Oct-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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