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Many galaxies host pronounced circumnuclear starbursts, fuelled by infallinggas. Such activity is expected to drive the secular evolution of the nucleusand generate super winds, while the intense radiation fields and extreme gasand cosmic ray densities present may act to modify the outcome of starformation with respect to more quiescent galactic regions. The centre of theMilky Way is the only example of this phenomenon where, by virtue of itsproximity, individual stars may be resolved. Previous studies have revealedthat it hosts a rich population of massive stars; these are located withinthree clusters, with an additional contingent dispersed throughout the CentralMolecular Zone (CMZ). We employed VLT+KMOS to obtain homogeneous, high S/Nspectroscopy of the later cohort for classification and quantitative analysis.Including previously identified examples, we found a total of 83 isolatedmassive stars within the Galactic Centre, which are biased towards objectssupporting powerful stellar winds and/or extensive circumstellar envelopes. Nofurther stellar clusters, or their tidally stripped remnants, were identified,although an apparent stellar overdensity was found to be coincident with theSgr B1 star forming region. The cohort of isolated massive stars within the CMZis comparable in size to that of the known clusters but, due to observationalbiases, is likely highly incomplete at this time. Combining both populationsyields over 320 spectroscopically classified stars that are expected to undergocore collapse within the next 20Myr. Given that this is presumably anunderestimate of the true number, the population of massive stars associatedwith the CMZ appears unprecedented amongst star formation complexes within theMilky Way, and one might anticipate that they play a substantial role in theenergetics and evolution of the nuclear region.

Constraining the population of isolated massive stars within the Central Molecular Zone