Free Access

Table 1.

Spectral lines and their associated atomic parameters for the three spectral ranges considered.

Spectral range Δλ nλ λ0 elow eupp log10g f Elow α
[mÅ] [Å] [eV]
(a) 6302.494 5.0P1.0 5.0D0.0 −1.236 3.686 0.239 850.930
Si I 1082.7 nm 18 278 10 827.091 3.0P2.0 3.0P2.0 0.239 4.953 0.231 729.807
Fe I 1565.0 nm 40 125 15 648.515 7.0D1.0 7.0D1.0 −0.669 5.426 0.229 974.195
40 125 15 662.018 5.0F5.0 5.0F4.0 0.19 5.83 0.240 1196.950

Notes. The first column is the label used for each spectral region (which might include more than one spectral line). In the other columns, Δλ is the pixel size in mÅ; nλ is the number of wavelengths used for that spectral line; λ0 is the central wavelength for the electronic transition associated with the spectral line; elow and eupp are the electronic configurations of the lower and upper energy level, respectively; Elow is the excitation potential (in eV) of the lower energy level; and α and are the velocity exponent and collision cross section parameters, respectively, as defined in Anstee, Barklem, and O’Mara collision theory for the broadening of metallic lines by neutral hydrogen collisions (Anstee & O’Mara 1995; Barklem 1998).


This spectral line is considered a blend with the spectral line with λ0 = 6301.501 Å.

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.