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Aims. In this work, we aim to make a differential comparison of theneutron-capture and p-process element molybdenum (Mo) in the stellarpopulations in the local disk(s) and the bulge, focusing on minimising possiblesystematic effects in the analysis. Methods. The stellar sample consists of 45bulge and 291 local disk K-giants, observed with high-resolution opticalspectra. The abundances are determined by fitting synthetic spectra using theSME-code. The disk sample is separated into thin- and thick-disk componentsusing a combination of abundances and kinematics. The cosmic origin of Mo isinvestigated and discussed by comparing with previous published abundances ofMo and the neutron-capture elements cerium (Ce) and europium (Eu). Results. Wedetermine reliable Mo abundances for 35 bulge and 282 disk giants with atypical uncertainty of [Mo/Fe]~0.2 and ~0.1 dex for the bulge and disk,respectively. Conclusions. We find that the bulge possibly is enhanced in[Mo/Fe] compared to the thick disk, which we do not observe in either [Ce/Fe]nor [Eu/Fe]. This might suggest a higher past star-formation rate in the bulge,however, since we do not observe the bulge to be enhanced in [Eu/Fe], theorigin of the molybdenum enhancement is yet to be constrained. Although, thescatter is large, we may be observing evidence of the p-process contributing tothe heavy element production in the chemical evolution of the bulge.

Abundances of disk and bulge giants from high-resolution optical spectra V. Molybdenum -- the p-process element