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Fig. 4.


Central sectors vertical density profiles. Top panel: density profiles for the northern and southern central sectors (in stars per kpc3) along the |z| axis (in kpc). Light-coloured solid lines follow sliding bins of a constant number of 50 stars while dots are the values of the density in independent bins of fixed size (see text for details). Bottom panel: normalised density differences between the north and south density profiles as a function of |z| (see Eq. (1)), red when the north is denser, and blue otherwise. Vertical error bars illustrate the normalised uncertainties added in quadrature.

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