Noise standard deviation σb,ρ in mK whichensures that relative precisions are better than ρ% (for details see Eq. (25)). Top: analysis of a single line. Bottom: analysis of two lines 13CO(1− 0) and 13CO(2− 1). The contours for 10 and 100 mK are highlighted because these σb values bracket the values reached during typical observations at the IRAM-30 m. For this analysis, ΔV is fixed at 1.1km s−1, but the computations are done for four different values of σV (0.3, 0.6, 1.3,and 2.0 km s−1) and then projected on the (N, Tex) plane (see text for details).
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.