Extended Data Fig. 1: Synthetic r-process-element transmission spectra.
From: Identification of strontium in the merger of two neutron stars
These spectra were generated using MOOG, in which the relative abundances are based on solar r-process abundances. The spectra were blueshifted, broadened and normalized as in Fig. 3. The solid black line is the total transmission spectrum for an atmosphere containing all the r-process elements (33As to 92U). The dashed black line is the same spectrum, but including only the light r-process elements (33As to 55Cs). The contributions from different subsets of species are also shown. The green dotted line shows the heavy r-process elements (56Ba to 92U); the blue dotted line shows the light r-process elements (33As−55Cs) excluding Sr, which is shown as a red dotted line. This plot shows how Sr stands out in absorption, regardless of the composition of the material. The normalization is arbitrary and different to the LTE equivalent in Fig. 3 for display reasons.
