Open Access

Table 2.

Description of free and fixed parameters used for the different spatial models applied.

Model description N components Fixed parameters Free parameters
M1. One circular exponential 1 ϵ = 0 ; n = 1 x; y; a; m
M2. One elliptical exponential 1 n = 1 x; y; a; m; ϵ; θ
M3. Two circular exponential 2 ϵ1 = ϵ2 = 0; n1 = n2 = 1; x1 = x2; y1 = y2;
fixed components a1 = aUV a2 ;m1; m2
M4. Two elliptical exponential 2 ϵ1 = ϵUV; θ1 = θUV x1 = x2; y1 = y2; a2
fixed components a1 = aUV; n1 = n2 = 1; m1; m2; ϵ2; θ2
M5. Two circular exponential 2 ϵ1 = ϵ2 = 0; n1 = n2 = 1 x1 = x2; y1 = y2;
fixed components a1 = aUV ± 0.1″; a2 ;m1; m2;
M6. Two elliptical exponential 2 n1 = n2 = 1 x1 = x2; y1 = y2;
fixed components a1 = aUV ± 0.1″; a2 ;m1; m2;
ϵ1; ϵ2; θ1; θ2
M7. Two free circular 2 n1 = n2 = 1; ϵ1 = ϵ2 = 0 x1; x2; y1; y2; a1; a2; m1; m2
components
M8. Two free elliptical 2 n1 = n2 = 1 x1; x2; y1; y2; a1; a2; m1; m2
components ϵ1; ϵ2; θ1: θ2
M9. One circular exponential 1 n1 = 1; ϵ1 = 0 x1; y1; a1; m1
component
M10. One elliptical exponential 1 n1 = 1 x1; y1; a1; m1, ϵ1, θ1
component
M11. One Sersic circular exponential 1 x1; y1; a1; m1; n1
component

Notes. x and y are the RA and DEC positions, m is the magnitude, a is the scale radius, n is the Sersic index, ϵ is the ellipticity, and θ is the positional angle. The models M1 and M2 are applied only on the UV images and models from M3 to M11 on Lyman-α images.

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.