Cosmic Dust: origin, applications & implications

Session

Non-stellar dust production and the dust cycle in the ISM

2c

11 Jun 2018, 09:15

Main Auditorium (Geological Museum, University of Copenhagen)

Conveners

Non-stellar dust production and the dust cycle in the ISM: Non-stellar dust production and the dust cycle in the ISM

• Thomas Henning (Max Planck Institute for Astronomy, Heidelberg)

Non-stellar dust production and the dust cycle in the ISM: Non-stellar dust production and the dust cycle in the ISM

• Thomas Henning (Max Planck Institute for Astronomy, Heidelberg)

16. The Condensation of Gas-Phase Elements onto Interstellar Dust Grains

Edward Jenkins (Princeton University)

11/06/2018, 09:15

The creation and evolution of dust

Review Talk

Over the past 45 years, investigations of ultraviolet absorption features in stellar spectra have revealed that most of the heavy elements in the interstellar medium are depleted from the gas phase to values well below solar or B star reference abundances. The strengths of such depletions reveal the composition of dust grains in space, and they can be characterized by a limited set of...

17. Growth, destruction, and expulsion of dust in galaxies

Prof. Kenji Bekki (University of Western Australia)

11/06/2018, 10:00

The creation and evolution of dust

Invited talk

Physical properties of interstellar dust (e.g., dust-to-gas ratios) are observed to be quite diverse in galaxies with different masses and types. I will discuss the origin of these diverse dust properties based on the latest results of galaxy-scale hydrodynamical simulations of galaxies with dust physics. I will particularly discuss how dust growth processes in interstellar medium (ISM)...

44. Probing dust properties in the LMC from UV to FIR

Julia Roman-Duval (Space Telescope Science Institute)

11/06/2018, 11:15

The creation and evolution of dust

Contributed talk

Interstellar dust is a key component of galaxy evolution owing to its crucial role in the chemistry and radiative transfer in galaxies. Our interpretation of extragalactic SEDs and our understanding of galaxy evolution thus critically depend on an accurate characterization of how the dust content and properties vary within and between galaxies. Recent observations suggest that dust grains must...

74. Low-temperature surface reactions of carbon atoms

Serge Krasnokutski (Laboratory Astrophysics Group of the Max Planck Institute for Astronomy at the Friedrich Schiller University Jena)

11/06/2018, 11:40

The creation and evolution of dust

Contributed talk

The method to study surface chemical reactions at ultra-low-temperatures and to measure the amount of energy release has been developed. The method was used to investigate surface reactions of carbon atoms leading to the formation of complex organic molecules (COMs). We found that that the key surface reaction $C + H_2 → HCH$ is barrierless in contrast with the previously considered energy...

139. Iron and silicate dust growth in the Galactic interstellar medium: clues from element depletions

Svitlana Zhukovska

11/06/2018, 12:05

The creation and evolution of dust

Contributed talk

The question “What is the dominant mechanism of dust formation?“ has long been the matter of debate. We address this question by modelling the distribution of interstellar Fe and Si element abundances in the local Milky Way with dust evolution model. The model follows the time evolution of grains in inhomogeneous, multiphase interstellar medium from high-resolution hydrodynamic simulations of...