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Multicolor CCD photometry of the open cluster NGC 752

Published online by Cambridge University Press:  18 January 2010

Stanislava Bartašiūtė ,
Robert Janusz ,
Richard P. Boyle ,
A. G. Davis Philip  and
Viktoras Deveikis
Stanislava Bartašiūtė
Affiliation:
Astronomical Observatory of Vilnius University, Čiurlionio 29, LT-03100, Vilnius, Lithuania email: [email protected]
Robert Janusz
Affiliation:
University School Ignatianum, ul. Kopernika 26, 31-501, Kraków, Poland email: [email protected] Vatican Observatory Research Group, Steward Observatory, Tucson, AZ 85721, USA email: [email protected]
Richard P. Boyle
Affiliation:
Vatican Observatory Research Group, Steward Observatory, Tucson, AZ 85721, USA email: [email protected]
A. G. Davis Philip
Affiliation:
ISO and Union College, 1125 Oxford Place, Schenectady, NY 12308, USA email: [email protected]
Viktoras Deveikis
Affiliation:
Astronomical Observatory of Vilnius University, Čiurlionio 29, LT-03100, Vilnius, Lithuania email: [email protected]
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Abstract

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We obtained CCD observations of the open cluster NGC 752 with the 1.8m Vatican Advanced Technology Telescope (Mt. Graham, Arizona) with a 4K CCD camera and eight intermediate-band filters of the Stromvil (Strömgren + Vilnius) system. Four 12′ × 12′ fields were observed, covering the central part of the cluster. The good-quality multicolor data made it possible to obtain precise estimates of distance moduli, metallicity and foreground reddening for individual stars down to the limiting magnitude, V = 17.5, enabling photometric identification of faint cluster members. The new observations provide an extension of the lower main sequence to three magnitudes beyond the previous (photographic) limit. A relatively small number of photometric members identified at fainter magnitudes seems to be indicative of actual dissolution of the cluster from the low-mass end.

Keywords

techniques: photometricopen clusters and associations: individual (NGC 752)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 361 - 364
Copyright
Copyright © International Astronomical Union 2010

References

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