Ammonia characterisation of dense cores in the Rosette Molecular Cloud

Context. The Rosette molecular cloud complex is a well-known Galactic star-forming region with morphology pointing towards triggered star formation. distribution of its young stellar population and the gas properties point to possibility that formation globally in region. Aims. We focus on characterisation most massive pre- protostellar cores distributed throughout order understand processes Methods. observed sample 33 dense cores, identified Herschel continuum maps, Effelsberg 100-m telescope. Using NH 3 (1,1) (2,2) measurements, we characterise core population, computing rotational kinetic temperatures column density multiple methods. also estimated pressure ratio virial parameters examine stability cores. results from Berschel data, examined possible correlations between dust parameters. Results. Ammonia emission detected 31 out selected targets. estimate be 12 20 K, densities within 10 14 −2 × 15 cm range Our analysis suggests sources are likely gravitationally bound, while line widths dominated by non-thermal motions. compatible large-scale temperature maps suggesting decreases increases distance NGC 2244 except for densest protoclusters. identify small spatial shift ammonia peaks regions exposed irradiation nearby cluster. However, find no trends terms evolution location, prestellar abundance ratio, or parameter. Conclusions. Star more based primordial structure spite impact cluster, 2244. physical measurements suggest those low- high-mass regions, could host ongoing intermediate-mass formation, unlikely form stars.