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Table 6

Magnetic energy density.

Source UH2O UStar (α = 1) UStar (α = 2) UStar (α = 3)
(J/m3) (J/m3) (J/m3) (J/m3)

IK Tau –4.8– –3.5 –3.0– –1.5 –1.2–0.5 0.7–2.4
RT Vir –4.2– –3.8 –2.4– –1.3 –0.7–1.2 1.1–3.7
IRC+60370 –5.1– –3.2 –3.4– –0.7 –1.7–1.7 0.0–4.2

U (J/m3) H2O Star

nKT ~–6.2 ~0.5
~–5.1 ~0.5

Notes.In the upper part of the table, from Cols. 1 to 4: the source name (Source), the log of the magnetic energy density (U = B2/2μ0) in the H2O maser region (UH2O), in the stellar surface assuming α equal to one (Ustar (α = 1)), in the stellar surface assuming α equal to two (Ustar (α = 2)), and in the stellar surface assuming α equal to three (Ustar (α = 3)). In the lower part of the table, we show the log of typical values for kinetic and thermal energy densities (Col. 1; Energy density) in the H2O maser region (Col. 2; H2O) and on the stellar surface (Col. 3; Star).

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