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2001MNRAS.327...23S - Mon. Not. R. Astron. Soc., 327, 23-45 (2001/October-2)
A multicolour CCD photometric and mass function study of the distant southern open star clusters NGC 3105, NGC 3603, Melotte 105, Hogg 15, NGC 4815, Pismis 20 and NGC 6253.
SAGAR R., MUNARI U. and DE BOER K.S.
Abstract (from CDS):
In the mass range ∼1-75M☉, the mass functions of all clusters except for NGC 6253 have been studied. The slopes of their mass spectra agree within errors with the Salpeter value (1.35). The slope of the mass function for stars more massive than 10M☉ is almost the same as for the lower mass stars. The mass function slopes of clusters younger than 500Myr seem to have no dependence on Galactic longitude, Galactocentric distance and cluster age. As the inherent uncertainties in the mass function determinations of young Galactic star clusters can produce internal scatter that is larger than the external scatter, we conclude that, above 1M☉, the initial mass function is universal with a slope of Salpeter value.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): stars: evolution - Hertzsprung-Russell (HR) diagram - stars: luminosity function, mass function - open clusters and associations: general
VizieR on-line data: <Available at CDS (J/MNRAS/327/23): tables 1, and 4 to 10>
Nomenclature: Table 4: Cl* NGC 3105 SMD CNNN N=90 among (Nos C1-C241), Cl* NGC 3105 SMD FNN (Nos F1-F70). Table 5: Cl* NGC 3603 SMD CNNNN N=428 among (Nos C1-C1193), Cl* NGC 3603 SMD FNN (Nos F1-F55). Table 6: Cl* Melotte 105 SMD CNNN N=202 among (Nos C1-C645), Cl* Melotte 105 SMD FNN (Nos F1-F59). Table 7: Cl* Hogg 15 SMD NNN (Nos 1-337). Table 8: Cl* NGC 4815 SMD CNNNN) N=573 among (Nos C3429-C9070), Cl* NGC 4815 SMD FNNN (Nos F1-F501). Table 9: Cl* Pismis 20 SMD NNN (Nos 1-139). Table 10: Cl* NGC 6253 SMD CNNNN N=683 among (Nos C1300-C6143), Cl* NGC 6253 SMD FNNN (Nos F1-F341).
Simbad objects: 1357
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