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The H2O maser toward IRAS 06308+0402 |
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| Authors: | M I Pashchenko E E Lekht A M Tolmachev |
| Institution: | (1) Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119992, Russia;(2) Instituto Nacional de Astrofísica, óptica y Electrónica, Luis Enrique Erro No. 1, Apdo Postal 51 y 216, 72840 Tonantzintla, Puebla, México;(3) Pushchino Radio Astronomy Observatory, Astrospace Center, Lebedev Institute of Physics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia |
| Abstract: | We present the monitoring results for the H2O maser toward the infrared source IRAS 06308+0402 associated with a dense cold molecular cloud. The observations were carried out with the 22-m radio telescope at the Pushchino Radio Astronomy Observatory (Russia) during 1992–2003. The H2O maser was discovered in May 1992 (Pashchenko 1992) during a survey of IRAS sources associated with dense cold clouds with bipolar molecular outflows. The H2O spectrum contains many emission features, suggesting the fragmentation of the envelope around a young star. The star has a low peculiar velocity relative to the CO molecular cloud (～2.2 km s?1). We found a cyclic variability of the total maser flux with a period from 1.8 to 3.1 yr. |
| Keywords: | interstellar medium gaseous nebulae stars— structure and evolution |
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