Dust plays a key role in astrophysics influencing a wide array of cosmic phenomena and processes. It pervades the universe, from the local to the early cosmos, and is of fundamental importance for understanding the formation and evolution of planets, stars, and galaxies. Astrophysical observations spanning from X-ray to mm wavelengths have to consider the presence of dust as it can absorb, emit, scatter or polarize radiation across a broad spectral range. Dust contributes to the cooling and heating of gas and promotes the formation of molecules in the ISM. Moreover, dust grains mediate the star formation process and constitute the building blocks of planetesimals. Cosmic dust, therefore, is not just a byproduct but a critical component of the universe.

The origin of dust is primarily linked to the remnants of supernova (SN) explosions or the outer shells of asymptotic giant branch (AGB) stars. Both environments provide perfect conditions for condensing dust from heavy elements. While SN remnants are cosmic dust factories, their energetic shocks are also able to sputter or fragment dust grains. Shocks resulting from the SN explosions can destroy a significant part of the newly formed dust as well as large amounts of the pre-existing ISM dust, which makes it unclear whether SNe are net dust producers or destroyers. AGB stars are well-established dust producers, but uncertainties remain regarding their ability to account for the vast amounts of dust observed in the early universe due to their long evolutionary timescales. The apparent challenge to reconcile dust destruction and formation rates has supported the idea of dust growth in the interstellar medium (ISM). To account for the total dust masses observed in the universe, accretion of gas phase metals onto pre-existing grain cores in the ISM is required. Recent insights from JWST enable us to track the rapid build up of metals in the early universe, whereas the complementary view with ALMA tells us that many of these metals are efficiently condensed into dust grains already at the cosmic dawn. This early onset of dust formation has puzzled the astronomical community and remains difficult to explain by chemical evolution models capable of reproducing the physical properties of local galaxies.

In this session, we aim to discuss the cutting-edge models and observations concerning the formation, growth and destruction of dust in SN remnants, in evolved stars, and in the ISM. We seek to trace the full life cycle of cosmic dust, from its creation to its eventual destruction or incorporation into other structures. By bringing together theorists and observers, we aim to foster a deeper understanding of the mechanisms and conditions that govern dust evolution in galaxies, helping to answer the eminent question about its role in shaping the universe.

Programme

Talk Types:

• IT = Invited Talk, 25 min (22+3)
• CT = Contributed Talk, 12 min (10+2)
• MT = Minitalk = ePoster + Poster Presentation, 5 min, no questions. ePoster optional.

Session SS18a, 09:00-10:30

• 09:00 Peter: Welcome
• 09:02 Martha Boyer: Dust in AGB stars (IT)
• 09:27 Luis Velilla-Prieto: The ALMA view of the dust formation zone of IRC+10216 (CT)
• 09:39 Thiebaut Schirmer: Constraining Dust Properties in the Oxygen-Rich AGB Star R Doradus (CT)
• 09:51 Marie van de Sande: Modelling predicts refractory organic coating of AGB dust (CT)
• 10:03 Jaime Alonso Hernández: Dust properties of AGB stars with ultraviolet excesses (CT)
• 10:15 Giada Pastorelli: Linking AGB self-excited pulsation with mass loss and dust formation (MT)
• 10:20 Celine Peroux: New constraints on models from dust observations across cosmic times (MT)
• 10:25 Ioanna Psaradaki: Mineralogy of interstellar dust in the X-ray regime (MT)

Session SS18b, 15:00-16:30

• 15:00 Arkaprabha Sarangi (pre-recorded talk): Dust formation in supernova remnants and around evolved stars (IT)
• 15:25 Patrick Kavanagh: The evolution of dust in SN1987A observed with JWST MIRI/MRS (CT)
• 15:37 Koki Otaki: Effects of reverse shock on grain size distributions in supernovae (CT)
• 15:49 Sergio Martínez González: Shock Processing and Dust Survival in SNRs and Circumstellar Environments (CT)
• 16:01 Frederick Gent: Supernova dust destruction in the magnetized turbulent ISM (CT)
• 16:13 Santiago Jiménez: Radiative Disruption of Dust Grains around Massive Stars (MT)
• 16:18 Simona Gallerani: The Evolution of Dust in High-Redshift Galaxies with JWST (MT)
• 16:23 Albert Sneppen: Grain properties from the X-ray scattering halo of GRB221009A (MT)

Session SS18c, 17:00-18:30

• 17:00 Raffaella Schneider: Tracing the sources of dust in the early Universe (IT)
• 17:25 Gergö Popping: Constraining Dust Evolution in Galaxies: Theory vs. Observations (CT)
• 17:37 Stefan van der Giessen: Disentangling galaxy and dust evolution mechanisms through chemical abundances (CT)
• 17:49 Sascha Zeegers: WISCI: Exploring dust properties in the nearby diffuse interstellar medium (CT)
• 18:01 Lapo Fanciullo: Bias on dust SED fits: the role of temperature-dependent opacity (CT)
• 18:13 Ambra Nanni: Dust survival in harsh environments: the role of photo-evaporation (CT)

Scientific organisers

Florian Kirchschlager (Chair; Ghent University), Matthias Maercker (co-Chair; Chalmers)
Francesca Pozzi (University of Bologna), Mónica Relaño (University of Granada)
Ilse De Looze (Ghent University), Elvire De Beck (Chalmers)
Nina Sanches Sartorio (Ghent University), Mike Barlow (University College London)
Patrick Kavanagh (Maynooth University), Tassilo Scheffler (Ghent University).

Contact

kirchschlager.astro at gmail.com