Open Access

Fig. 3.

image

Download original image

Selected Ka = 2 transitions of HCCCHCCC in TMC-1. The abscissa corresponds to the rest frequency of the lines. Frequencies and intensities for all observed lines are given in Table A.1. The ordinate is the antenna temperature, corrected for atmospheric and telescope losses, in millikelvin. The quantum numbers of each transition are indicated in the corresponding panel. The red line shows the computed synthetic spectrum for this species for Trot = 6±1 K and a column density of (1.3±0.2) × 1011 cm−2. Blanked channels correspond to negative features produced when folding the frequency-switched data. Green labels indicate the transitions for which only one of the frequency-switching data have been used (FS10 and FS8 correspond to a throw of 10 and 8 MHz, respectively).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.