Fig. 10

image

Illustration of step 5 of data analysis for the jet. Top panel: extracted spectra of HO from the 14.31–14.44 September 2015 UT map in the [225–285]° range of PA and [7.5–10] km range of the projected radius (mean radius of 8.648 km, middle spectrum from Fig. 9). Isotropic models with QH218O = 2 × 1025 molec. s−1 (blue) and QH218O = 4 × 1025 molec. s−1 (red) are superimposed for channel-by-channel interpolation and determination of qH218O for each channel. Central panel: line intensity in each channel or velocity bin converted into production rate per solid angle (vertical scale). There is a sharp cutoff for absolute velocities that are higher than the expansion velocity, for which the signal is close to 0, as expected. Bottom panel: horizontal scale in Doppler velocity converted into colatitude ϕ angle (vi = vexp cos(ϕi)) assuming a constant expansion velocity (vexp = 0.82 km s−1 here). Pink dots show values that were retrieved from individual channels, and connected points represent a smoothed profile that takes thermal broadening into account (see text).

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