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Neutral hydrogen around the oxygen-sequence Wolf-Rayet star WR 102 and the nebula G2.4+1.4

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Abstract

We carried out the first 21-cm line observations of an extended region around the Wolf-Rayet star WR 102 and the associated nebula G2.4+1.4 with the RATAN-600 radio telescope. An irregular H I shell was identified. Its maximum expansion velocity reaches ∼50 km s−1, and its outer diameter (at a distance of 3 kpc) is 56 pc. The mechanical luminosity of the stellar wind required to produce the observed shell is estimated to be ∼0.8×1038 erg s−1; the age of the shell is ∼3.4×105 yr. We compare the inferred parameters of the H I shell with the structure and kinematics of the ionized nebula and with the dust distribution in the region.

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Authors and Affiliations

  1. Special Astrophysical Observatory St. Petersburg Branch, Russian Academy of Sciences, Pulkovo, St. Petersburg, 196140, Russia

    I. V. Gosachinskij

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

    T. A. Lozinskaya

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  1. I. V. Gosachinskij
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  2. T. A. Lozinskaya
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Translated from Pis'ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 28, No. 10, 2002, pp. 775–787.

Original Russian Text Copyright © 2002 by Gosachinskij, Lozinskaya.

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Gosachinskij, I.V., Lozinskaya, T.A. Neutral hydrogen around the oxygen-sequence Wolf-Rayet star WR 102 and the nebula G2.4+1.4. Astron. Lett. 28, 701–712 (2002). https://doi.org/10.1134/1.1512227

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