The global dust modelling framework THEMIS (The Heterogeneous dust Evolution Model for Interstellar Solids)

TL;DR

The paper introduces the THEMIS framework, a comprehensive model for understanding the evolution of interstellar dust across different regions, integrating dust properties, evolution, and environmental effects.

Contribution

It presents a new, unified framework for modeling interstellar dust evolution, extending previous models to include dense regions and star-forming environments.

Findings

Successfully models dust extinction and emission in diffuse regions

Incorporates dust evolution in transition to denser media

Extends to explore dust in HII and photon-dominated regions

Abstract

Here we introduce the interstellar dust modelling framework THEMIS (The Heterogeneous dust Evolution Model for Interstellar Solids), which takes a global view of dust and its evolution in response to the local conditions in interstellar media. This approach is built upon a core model that was developed to explain the dust extinction and emission in the diffuse interstellar medium. The model was then further developed to self-consistently include the effects of dust evolution in the transition to denser regions. The THEMIS approach is under continuous development and currently we are extending the framework to explore the implications of dust evolution in HII regions and the photon-dominated regions associated with star formation. We provide links to the THEMIS, DustEM and DustPedia websites where more information about the model, its input data and applications can be found.