All Figures

$\begin{figure} \par\includegraphics[angle=0,width=8.5cm]{9407fg01.eps} % \end{figure}$ Figure 1: Colour gradients vs. the central brightness excess, $\eta$ . a) Colourgradient calculated over the bluer semi-minor axis profile, b) colour gradient calculated over the redder semi-minor axis profile, c) colour gradient calculated over the averaged semi-major axis profile. Filled circles (red in the electronic edition): galaxies with prominent bulge ( $\eta > 1$ ). Open circles (blue in the electronic edition): galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=13.8cm,clip]{9407fg02.eps}\end{figure}$ Figure 2: Observed (F606W-F814W) colours measured at 0.85 kpc from the center along the minor axis vs. redshift for the high- and low-inclination samples. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ). Solid lines: observed colour tracks for passive evolution systems (SSP model with solar metallicity, a Chabrier (2003) IMF, no dust) with formation redshifts equal to 10, 3 and 1.5, top to bottom.
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=13cm,clip]{9407fg03.eps} % \end{figure}$ Figure 3: Rest-frame central (B - R) and (U-B) colours vs. redshift for the high- ( left panels) and low-inclination ( right panels) samples. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Smaller filled circles: galaxies with prominence indices in the range $1 < \eta < 1.5$ . Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ). Orange diamonds in upper panels: rest-frame (B-R) colours of local bulges (Peletier & Balcells 1996). Solid lines: rest-frame colour tracks for passive evolution systems (SSP model with solar metallicity, a Chabrier (2003) IMF, no dust) with formation redshifts equal to 10, 3 and 1.5, top to bottom.
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=8.8cm,clip]{9407fg04.eps}\end{figure}$ Figure 4: Histograms for the rest-frame central (B - R) and (U-B) colours measured at 0.85 kpc from the center along the minor axis for the high- ( left panels) and low-inclination ( right panels) samples. Solid line (red in electronic edition): colours of galaxies with prominent bulges ( $\eta > 1$ ). Dashed line: colours of galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=8.8cm,clip]{9407fg05.eps}\end{figure}$ Figure 5: Histograms for the rest-frame central (B - R) and (U-B) colours measured at 0.85 kpc from the center along the minor axis for the subsample with z<0.5 ( left) and the subsample with 0.5 < z <1.2 ( right). Solid line (red in electronic edition): colours of galaxies with prominent bulges ( $\eta > 1$ ). Dashed line: colours of galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=13cm,clip]{9407fg06.eps}\end{figure}$ Figure 6: Colour-magnitude diagrams: (B-R) vs. M_R, (U-B) vs. M_B for the high- ( left panels) and low-inclination ( right panels) samples. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Smaller filled circles: galaxies with prominence indices in the range $1 < \eta < 1.5$ . Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ). Dashed line: colour-magnitude distribution for early-type galaxies in the Coma cluster, derived from the CMDs of Eisenhardt et al. (2007) and Scodeggio (2001). Red vectors: reddening-attenuation vectors for galaxies with B/T=0.4, central B-band opacity $\tau _B = 4$ , and inclinations of $60\ensuremath {{^\circ }}$ and $30\ensuremath {{^\circ }}$ , respectively. Blue vectors: reddening-attenuation vectors for pure disk galaxies with central B-band opacity $\tau _B = 4$ , and inclinations of $60\ensuremath {{^\circ }}$ and $30\ensuremath {{^\circ }}$ , respectively.
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=13cm,clip]{9407fg07.eps}\end{figure}$ Figure 7: Rest-frame (B-R) and (U-B) colours measured at 0.85 kpc vs. the integrated rest-frame colour of total galaxy for the high- ( left panels) and low-inclination ( right panels) samples. Integrated colours are measured in a 2.6'' diameter aperture. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Smaller filled circles: galaxies with prominence indices in the range $1 < \eta < 1.5$ . Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=14.5cm,clip]{9407fg08.eps}\end{figure}$ Figure 8: Rest-frame (B-R) and (U-B) colours measured at 0.85 kpc vs. the rest-frame colour of the disk for the high- ( left panels) and low-inclination ( right panels) samples measured at 0.85 kpc. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Smaller filled circles: galaxies with prominence indices in the range $1 < \eta < 1.5$ . Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=14.5cm,clip]{9407fg09.eps} % \end{figure}$ Figure 9: Differences between bulge colour at 0.85 kpc and disk colour vs. the central brightnes excess, $\eta$ for the high- ( left panel) and low-inclination ( right panel) samples measured at 0.85 kpc. Filled circles (red in the electronic edition): colours of galaxies with prominent bulge ( $\eta > 1$ ). Open circles (blue in the electronic edition): colours of galaxies without bulges ( $\eta < 1$ ).
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=8.8cm,clip]{9407fg04.eps}\end{figure}$	Figure 4: Histograms for the rest-frame central (B - R) and (U-B) colours measured at 0.85 kpc from the center along the minor axis for the high- ( left panels) and low-inclination ( right panels) samples. Solid line (red in electronic edition): colours of galaxies with prominent bulges ( $\eta > 1$ ). Dashed line: colours of galaxies without bulges ( $\eta < 1$ ).
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$\begin{figure} \par\includegraphics[angle=0,width=8.8cm,clip]{9407fg05.eps}\end{figure}$	Figure 5: Histograms for the rest-frame central (B - R) and (U-B) colours measured at 0.85 kpc from the center along the minor axis for the subsample with z<0.5 ( left) and the subsample with 0.5 < z <1.2 ( right). Solid line (red in electronic edition): colours of galaxies with prominent bulges ( $\eta > 1$ ). Dashed line: colours of galaxies without bulges ( $\eta < 1$ ).
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