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Young Stellar Complexes in the Giant Galaxy UGC 11973

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We present results of the analysis of photometric and spectroscopic observations of the young stellar complexes in the late giant spiral galaxy UGC 11973. Photometric analysis in the \(UBVRI\) bands have been carried out for the 13 largest complexes. For one of them, metallicity of the surrounding gas \(Z = 0.013 \pm 0.005\), the mass \(M = (4.6 \pm 1.6) \times {{10}^{6}}{\kern 1pt} {{M}_{ \odot }}\), and the age of the stellar complex \(t = (2.0 \pm 1.1) \times {{10}^{6}}\) yr were evaluated, using spectroscopic data. It is shown that all complexes are massive (\(M \geqslant 1.7 \times {{10}^{5}}{\kern 1pt} {{M}_{ \odot }}\)) stellar groups younger than \(3 \times {{10}^{8}}\) yr.

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Notes

  1. http://galex.stsci.edu/GR6/?page=explore&objidc72147238576064570

  2. http://ned.ipac.caltech.edu/

  3. http://leda.univ-lyon1.fr/

  4. http://leda.univ-lyon1.fr/

  5. http://lnfm1.sai.msu.ru/\( \sim \)gusev/sfr_cat.html

  6. http://stev.oapd.inaf.it/cgi-bin/cmd

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ACKNOWLEDGMENTS

The authors thank the referee for valuable comments and S.N. Dodonov (SAO RAS) for his help in observing with the BTA telescope.

Funding

This work was partially supported by the grant of the Moscow State University Development Program “Leading Scientific School: Physics of Stars, Relativistic Objects and Galaxies.” This work was carried out as part of a scientific project supported since 2020 by the Russian Foundation for Basic Research (RFBR) (project No. 20-02-00080).

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Authors and Affiliations

  1. Lomonosov Moscow State University, Sternberg State Astronomical Institute, Moscow, Russia

    A. S. Gusev & O. V. Ezhkova

  2. Applied Sciences University Hessen-Friedberg, Friedberg, Germany

    F. Kh. Sakhibov

Authors
  1. A. S. Gusev
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  2. F. Kh. Sakhibov
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  3. O. V. Ezhkova
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Correspondence to A. S. Gusev.

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Translated by L.R. Yungelson

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Gusev, A.S., Sakhibov, F.K. & Ezhkova, O.V. Young Stellar Complexes in the Giant Galaxy UGC 11973. Astron. Rep. 64, 375–383 (2020). https://doi.org/10.1134/S1063772920060025

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