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Abridged: We present a detailed multi-wavelength study of the bright-rimmedcloud SFO 75, including 1.3cm and 1.2mm continuum, and 13CO and ammoniaspectral line observations. The 13CO and 1.2 mm emission reveals the presenceof a dense core located behind the bright rim of the cloud which isapproximately coincident with that of the IRAS point source. From an analysisof the IRAS and 1.2mm fluxes we derive a dust temperature of ~30 K, aluminosity of 1.6x10^4 L\odot and estimate the core mass to be ~570 M\odot. Thehigher resolution ammonia observations resolve the 1.2mm core into two distinctcores, one directly behind the cloud's rim (Core A) and the second locatedslightly farther back (Core B). Comparing the morphology of Core A with that ofthe photon-dominated region and ionised boundary layer leaves little doubt thatit is being strongly affected by the ionisation front. 2MASS and GLIMPSEarchive data which reveal a small cluster of three deeply embedded high- andintermediate-mass young stellar objects towards Core A leads us to concludethat the star formation found towards this core has been triggered. In starkcontrast, Core B appears to have a much simpler, almost spherical, morphology.No stars are found towards Core B. The scenario that emerges from our analysisis one where the two ammonia cores pre-date the arrival of the ionisationfront. Since its arrival the over-pressure of the ionised gas at the surface ofthe cloud has driven shocks into the surface layers of the cloud. Thepropagation of these shocks through Core A have triggered the formation of asmall cluster of massive stars, however, the shock front has not yet propagateddeeply enough into the cloud to have affected the evolution of Core B.Comment: 15 pages, 8 figures, some figures have been compressed, an  uncompressed version of the paper is available upon request from the lead  author. Accepted for publication in A&

A tale of two cores: triggered massive star formation in the bright-rimmed cloud SFO 75