Estimation of physical conditions in star formation region S255IR-SMA1
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The physical conditions were estimated from the methanol radio lines observed at 0.8 mm with IRAM30m in the star-forming region S255IR-SMA1. In the approximation of a large velocity gradient (LVG), the values of the gas kinetic temperature (170 K), the number density of molecular hydrogen (3×106 cm−3), the specific column density of methanol (2×1012 cm−3s), the relative abundance of methanol (10−7) and the filling factor (10 %). The parameter values are typical for hot dense cores. It is shown that the S255IR-SMA1 object is significantly inhomogeneous within the diagram (7.5 ).
2019 ◽
Vol 489
(1)
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pp. 962-976
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2019 ◽
Vol 490
(4)
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pp. 4489-4501
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2021 ◽
Vol 503
(3)
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pp. 4309-4319
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2007 ◽
Vol 3
(S242)
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pp. 234-235
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2017 ◽
Vol 13
(S336)
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pp. 347-350
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Nitrogen and hydrogen fractionation in high-mass star-forming cores from observations of HCN and HNC
2018 ◽
Vol 609
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pp. A129
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2001 ◽
Vol 89
(1)
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pp. 31-43
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