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Comparison of UBVR photometry of giant HII regions in NGC 628 with a detailed grid of evolution models of star clusters

Published online by Cambridge University Press:  01 December 2006

Alexander S. Gusev ,
Valery I. Myakutin ,
Firouz K. Sakhibov  and
Mikhail A. Smirnov
Alexander S. Gusev
Affiliation:
Sternberg Astronomical Institute, Universitetskij Pr. 13, Moscow 119992, Russia email: gusev@sai.msu.ru
Valery I. Myakutin
Affiliation:
Institute of Astronomy of the Russian Academy of Sciences, Pyatnistkaya Str. 48, Moscow 119017, Russia
Firouz K. Sakhibov
Affiliation:
University of Applied Sciences Giessen-Friedberg, Wilhelm-Leuschner Str. 13, Friedberg 61169, Germany email: fsakhibov@yahoo.com Institute of Astrophysics of the Tajik Academy of Sciences, Bukhoro Str. 22, Dushambe 734042, Tajikistan
Mikhail A. Smirnov
Affiliation:
Institute of Astronomy of the Russian Academy of Sciences, Pyatnistkaya Str. 48, Moscow 119017, Russia
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Abstract

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We present our UBVR photometry observations of giant HII regions in NGC 628 in comparison with a detailed grid of evolutionary models of stellar clusters to interpret the observed colours of young stellar populations in terms of IMFs and SFRs parameters and dust content. Observed colours are complicate functions of searched IMF, age, regime of star formation as well as chemical abudances and interstellar reddening. A content of database of observed properties is crucial to get significant results. To exclude age-reddening and age-metallicity degenerations we carried out UBVR photometry of 127 giant HII regions are star formation complexes (SFCs) with independently measured chemical abundancies Z and interstellar reddening in NGC 628 by Belly & Roy (1992).

Keywords

HII regionsgalaxies: photometrymethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 513 - 514
Copyright
Copyright © International Astronomical Union 2007

References

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Bruevich, V.V., Gusev, A.S., Ezhkova, O.V., Sakhibov, F.Kh., & Smirnov, M.A. 2007, Astron. Rep. 51, 222CrossRefGoogle Scholar
Piskunov, A.E. & Myakutin, V.I. 1996, Astron. Rep. 45, 375Google Scholar
Sakhibov, F. & Smirnov, M. 2000, A&A 354, 802Google Scholar
Sakhibov, F.Kh. & Smirnov, M.A. 2001, Astron. Rep. 45, 1CrossRefGoogle Scholar