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To characterize a bright-rimmed cloud embedded in the HII region Sh2-48searching for evidence of triggered star formation. We carried out observationstowards a region of 2'x2' centered at RA=18h 22m 11.39s, dec.=-14deg 35m 24.81s(J2000) using the Atacama Submillimeter Telescope Experiment (ASTE; Chile) inthe 12CO J=3-2,13CO J=3-2, HCO+ J=4-3, and CS J=7-6 lines with an angularresolution of about 22". We also present radio continuum observations at 5 GHzcarried out with the Jansky Very Large Array (JVLA; EEUU) interferometer with asynthetized beam of 7"x5". The analysis of our molecular observations revealsthe presence of a relatively dense clump with n(H_2)~3x10^3 cm^-3, located inprojection onto the interior of the HII region Sh2-48. The emissiondistribution of the four observed molecular transitions has, at VLSR~38 kms^-1,morphological anti-correlation with the bright-rimmed cloud as seen in theoptical emission. From the new radio continuum observations we identify a thinlayer of ionized gas located at the border of the clump which is facing to theionizing star. The ionized gas has an electron density of about 73 cm^-3 whichsupports the hypothesis that the clump is being photoionized by the nearbystar, BD-14 5014. From the evaluation of the pressure balance between theionized and molecular gas, we conclude that the clump would be in apre-pressure balance state with the shocks being driven into the surface layer.Two YSO candidates (class I), are placed slightly beyond the bright rimsuggesting that their formation could have been triggered via theradiation-driven implosion process.

A bright-rimmed cloud sculpted by the H ii region Sh2-48