  The problem of resolving point-like light sources not only serves as a
benchmark for optical resolution but also holds various practical applications
ranging from microscopy to astronomy. In this research, we aim to resolve two
thermal sources sharing arbitrary mutual coherence using the spatial mode
demultiplexing technique. Our analytical study includes scenarios where the
coherence and the emission rate depend on the separation between the sources,
and is not limited to the faint sources limit. We consider the fluorescence of
two interacting dipoles to demonstrate that the dependence of emission
characteristics on the parameter of interest can boost the sensitivity of the
estimation and noticeably prolong the duration of information decay.
