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Observations of Maser Emission in the Star-Forming Region G43.8-0.1. II. H2O Maser Emission at 1.35 cm

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Abstract

The results of observations of water maser emission in the star-forming region G43.8-0.1, performed at a wavelength of 1.35 cm with the 22-m radio telescope of the Pushchino Radio Astronomy Observatory are presented. The integrated intensity of the maser emission in G43.8-0.1 varies quasi-periodically on characteristic time scales between 3.9 and 12.1 yr, possibly related to variations of the activity of the central star during its formation. Nine strong flares with maximum fluxes exceeding 3000 Jy were detected, and were identified with maser spots in high-resolution maps. It is argued that a shell model for the H2O maser in G43.8-0.1 is preferred.

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Acknowledgments

We thank the staff of the Pushchino Radio Astronomy Observatory for their considerable help during the observations.

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Authors and Affiliations

  1. LESIA, Observatoire de Paris-Meudon, CNRS, UPMC, Université Paris-Diderot, 92195, Meudon Cedex, France

    P. Colom

  2. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, 119992, Russia

    N.T. Ashimbaeva, E. E. Lekht, M. I. Pashchenko & G. M. Rudnitskii

  3. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

    V. V. Krasnov

  4. Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia

    A. M. Tolmachev

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  1. P. Colom
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  2. N.T. Ashimbaeva
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  3. E. E. Lekht
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  4. M. I. Pashchenko
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  5. G. M. Rudnitskii
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  6. V. V. Krasnov
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  7. A. M. Tolmachev
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Corresponding author

Correspondence to E. E. Lekht.

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Russian Text © The Author(s), 2019, published in Astronomicheskii Zhurnal, 2019, Vol. 96, No. 10, pp. 815–830.

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Colom, P., Ashimbaeva, N., Lekht, E.E. et al. Observations of Maser Emission in the Star-Forming Region G43.8-0.1. II. H2O Maser Emission at 1.35 cm. Astron. Rep. 63, 814–829 (2019). https://doi.org/10.1134/S0004629919100049

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  • DOI: https://doi.org/10.1134/S0004629919100049

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