# The physical and chemical properties of planet forming disks

## TL;DR

Recent advances in observational astronomy, especially with VLT and ALMA, have significantly enhanced our understanding of the physical and chemical properties of planet-forming disks, revealing complex structures and compositions at early stages.

## Contribution

This paper reviews current knowledge of physical and chemical properties of protoplanetary disks, emphasizing recent multi-wavelength observational studies and their implications for planet formation.

## Key findings

- Disks exhibit non-axisymmetric structures linked to planet formation.
- Solid and gas mass content varies with disk age and location.
- Chemical composition and snow lines influence planet formation processes.

## Abstract

VLT instruments and ALMA have revolutionized in the past five years our view and understanding of how disks turn into planetary systems. They provide exquisite insights into non-axisymmetric structures likely closely related to ongoing planet formation processes. The following cannot be a complete review of the physical and chemical properties of disks; instead I focus on a few selected aspects. I will review our current understanding of the physical properties (e.g. solid and gas mass content, snow and ice lines) and chemical composition of planet forming disks at ages of 1-few Myr, especially in the context of the planetary systems that are forming inside them. I will highlight recent advances achieved by means of consistent multi-wavelength studies of gas AND dust in protoplanetary disks.