Fig. 2

Expected RV precisions of an M9.5-dwarf with a temperature of 2200 K and a projected rotational velocity of vsini = 5 km s-1 in the different NIR wavelength bands (Y, J, H and K) for different spectral resolving powers. For these simulations, we accounted for the spectral flux distribution of the M9.5-dwarf, and assumed a homogeneously sensitive detector throughout the NIR. The gray spectrum in the background represents the transmission of the Earth’s atmosphere (the value 30 in the y-axis corresponds to 100% transmission). The SNR in the brightest regions in the stellar continuum of the M-dwarf was set to be 90 for a spectral resolving power of R = 80 000. The SNR values and the RV precision values for the different wavelength bands and spectral resolving powers are given in Table 1. Although the spectral flux distribution of such a cool dwarf peaks around 1.2 μm, the highest radial velocity precision is attained in the Y band.
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.