Fig. 4.
Top: integrated flux of the CO J = 15−14 transition at 173.6 μm (FCO 15−14) against the IRAS 100 μm flux. Targets with no PACS data beyond ∼145 μm (i.e. not covering this CO transition; RR Aql and T Cep – see Fig. 3) or with bad quality (Quality Flag≠3) IRAS100 data (OH 26.5+0.6) are excluded. Middle: fluxes of the CO J = 15−14 transition and the adjacent continuum (PACS170). In this diagram, OH 26.5+0.6 is included. Bottom: line-to-continuum (F CO 15−14-to-PACS170) flux ratio against the IRAS colour [12]−[25].
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