This article has an erratum: [https://doi.org/10.1051/0004-6361/201935359e]
Comparison of HD 191 201 spectra for the He I λ4922 region that highlights the importance of combining spatially and spectrally resolved information to analyze multiple systems. The two bottom plots show the spatially resolved, rectified, and normalized GOSSS spectra of HD 191 201 A and B, respectively (all plots are offset by 0.1 continuum units with respect to the adjacent ones). The middle plot is a linear combination of the bottom two (using the measured Δm) to simulate the A+B spectrum, note how the B component leaves just a small imprint around λ ≈ 4922 Å due to its relative faintness. The top plot shows a LiLiMaRlin spectrum of A+B taken at a similar phase as the GOSSS spectra and the one below it is the same spectrum degraded to the GOSSS spectral resolution. Note the similarity between the two spectra of A+B at R = 2500 but the different paths taken to obtain them.
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.