Special Session SS7
14 July 2023
Dust lifecycle: from stars to the interstellar medium of galaxies
Dust has a far-reaching relevance in many astrophysical processes: it acts as catalyst for molecules that form onto grains, and as gas coolant, allowing for the genesis of stars and planets that can harbour life. In the interstellar medium (ISM), dust has a key role in the radiative transfer and chemistry which greatly impact galaxy evolution. On top of this, dust grains are able to absorb the radiation from young stars and to re-emit it mostly in the far-infrared bands affecting the spectral energy distribution of galaxies. Therefore, the study of dust in galaxies is of paramount importance to understand the origin of planetary systems, including the Solar System, out to the first galaxies formed. The origin and evolution of dust is still a matter of debate. If on one hand, massive stars are the first objects able to enrich the ISM with metals and dust, eventually exploding as Type II Supernovae (SNe) in less than 30 Myrs, on the other hand, the vast majority of the stars formed will end their evolution in a time scale between 100 Myrs and the age of the Universe, as thermally pulsing asymptotic giant branch (TP-AGB) stars, losing mass at high rates. Grain evolution in the ISM (e.g. accretion, destruction) makes the picture even more complicated. Although significant progress has been made in exploring dust characteristics across a wide range of astrophysical conditions, thanks to the increasing capabilities of space- and ground-based telescopes operating at infrared and sub-millimeter wavelengths (e.g. Spitzer; the Herschel Space Observatory; IRAM-NOEMA/NIKA2, ALMA, SCUBA2, and JWST), detailed studies of the dust properties in different environments and over cosmic times are still scarce and basic questions about its formation and evolution continue to be debated. In this session we aim to discuss the state-of-the-art of models and observations of dust in different environments, including revealing exciting results from JWST observations. We also aim to discuss the challenges that lie ahead also in view of future sub-mm telescope surveys (CCTP and AtLAST) that will allow to chracterize cold dust up to high-z (z~6). We also welcome abstracts from scientists involved in laboratory experiments on dust.
We believe it is timely to review and discuss recent progress, open questions and further development in the aforementioned fields, in particular through the view of synergy between JWST and current/future sub-mm instruments.
Updated on Mon Apr 17 14:04:58 CEST 2023
European Astronomical Society