RJ-plots: An improved method to classify structures objectively

The interstellar medium is highly structured, presenting a range of morphologies across spatial scales. large data sets resulting from observational surveys and state-of-the-art simulations studying these hierarchical structures means that identification classification must be done in an automated fashion to efficient. Here we present RJ-plots, improved version the morphological technique J-plots developed by Jaffa et al. (2018). This method allows clear distinctions between quasi-circular/elongated centrally over/under-dense structures. We use recent SEDIGISM catalogue Neralwar (2022) show improvement especially for ring-like concentrated cloud types. also find strong correlation central concentration structure its star formation efficiency dense gas fraction, as well lack with elongation. Furthermore, accreting filament Clarke (2020) highlight multi-scale application finding while spherical become more common at smaller scales they are never dominant down $r\sim0.03$ pc.