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Ionized gas in the Irr galaxy IC 10: The emission spectrum and ionization sources

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Abstract

We present the observations of the Irr galaxy IC 10 at the 6-m SAO telescope with the panoramic Multi-Pupil Fiber Spectrograph (MPFS). Based on the results of these observations and our long-slit spectroscopy performed previously, we have investigated the ionized-gas emission spectrum in the region of intense star formation and refined the gas metallicity estimates. We show that the “diagnostic diagrams” constructed from our observations agree best with the new improved ionization models by Martin-Manjon et al. Using these models, we have determined the electron density and gas ionization parameter and ionizing-cluster characteristics, the age and mass, from the spectra of the investigated HII regions. The cluster ages and masses are shown to be within the ranges 2.5–5 Myr and (0.2–1) × 105 M ⊗, respectively.

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia

    V. P. Arkhipova, O. V. Egorov & T. A. Lozinskaya

  2. Special Astrophysical Observatory (SAO), Russian Academy of Sciences, Nizhnii Arkhyz, 357147, Karachai-Cherkessian Republic, Russia

    A. V. Moiseev

Authors
  1. V. P. Arkhipova
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  2. O. V. Egorov
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  3. T. A. Lozinskaya
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  4. A. V. Moiseev
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Correspondence to V. P. Arkhipova.

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Original Russian Text © V.P. Arkhipova, O.V. Egorov, T.A. Lozinskaya, A.V. Moiseev, 2011, published in Pis’ma v Astronomicheskił Zhurnal, 2011, Vol. 37, No. 2, pp. 83–101.

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Arkhipova, V.P., Egorov, O.V., Lozinskaya, T.A. et al. Ionized gas in the Irr galaxy IC 10: The emission spectrum and ionization sources. Astron. Lett. 37, 65–82 (2011). https://doi.org/10.1134/S1063773710110039

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  • DOI: https://doi.org/10.1134/S1063773710110039

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