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Relation of SiO maser emission to IR radiation in evolved stars based on the MSX observation

Abstract

Based on the space MSX observation in bands A(8μ\mum), C(12μ\mum), D(15μ\mum) and E(21μ\mum), and the ground SiO maser observation of evolved stars by the Nobeyama 45-m telescope in the v=1 and v=2 J=1-0 transitions, the relation between SiO maser emission and mid-IR continuum radiation is analyzed. The relation between SiO maser emission and the IR radiation in the MSX bands A, C, D and E is all clearly correlated. The SiO maser emission can be explained by a radiative pumping mechanism according to its correlation with infrared radiation in the MSX band A.Comment: 11 pages, 4 figures, to appear in ApJ

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    Last time updated on 04/12/2019