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J/A+A/337/125 NGC 1750 & 1758 membership probabilities (Galadi-Enriquez+, 1998)
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Beginning of ReadMe :J/A+A/337/125 NGC 1750 & 1758 membership probabilities (Galadi-Enriquez+, 1998)
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The overlapping open clusters NGC 1750 and NGC 1758.
III. Cluster-field segregation and clusters physical parameters.
Galadi-Enriquez D., Jordi C., Trullols E.
<Astron. Astrophys. 337, 125 (1998)>
=1998A&A...337..125G
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ADC_Keywords: Clusters, open ; Photometry, UBVRI
Keywords: open clusters and associations: individual: NGC 1746 -
open clusters and associations: individual: NGC 1750 -
open clusters and associations: individual: NGC 1758 -
stars: luminosity function, mass function - methods: statistical
Abstract:
Cluster-field segregation and determination of physical parameters of
the open clusters NGC 1750 and NGC 1758 were performed from CCD and
photographic photometric and astrometric surveys previously published
by the authors. Membership probabilities were computed to a brightness
limit of R=15mag through a non-standard method in a fully
non-parametric approach, using proper motions, positions and
photometry. This study allowed several parameters for NGC 1750 and NGC
1758 to be determined, including position, size, density profile,
absorption, distance, age, luminosity function and mass. The common
colour excess of both clusters is E(B-V)=0.34mag. NGC 1750 is slightly
younger (log(t)=8.3), closer (V-M_v_=9.0mag) and less concentrated
than NGC 1758 (log(t)=8.60 and V-M_v_=9.4mag). We also conclude that
NGC 1746 is an erroneous assignation (not corresponding to any real
open cluster), and that NGC 1750 and NGC 1758 are overlapping
clusters, but they do not constitute a gravitationally bounded system.