Neutral hydrogen around the oxygen-sequence Wolf-Rayet star WR 102 and the nebula G2.4+1.4 |
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| Authors: | I V Gosachinskij T A Lozinskaya |
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| Institution: | (1) Special Astrophysical Observatory St. Petersburg Branch, Russian Academy of Sciences, Pulkovo, St. Petersburg, 196140, Russia;(2) Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia |
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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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| Keywords: | interstellar medium gaseous nebulae radio sources |
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