Physical processes in the ISM

Session

Chemical processes in the ISM

22 Oct 2013, 12:05

MPE

Conveners

Chemical processes in the ISM

• Dominik Schleicher

126. Chemical processes in the ISM: Gas and molecules

Simon Glover (ZAH/ITA University of Heidelberg)

22/10/2013, 12:05

review talk

125. Chemical processes in the ISM: Dust

Thomas Henning (MPIA Heidelberg)

22/10/2013, 14:05

review talk

18. Galactic dust as seen by Planck

Marta Alves (Institut d'Astrophysique Spatiale (IAS))

22/10/2013, 14:35

contributed talk

The Planck all-sky survey has opened a new window in our understanding of interstellar dust emission in extending to sub-millimetre wavelengths and microwave frequencies the detailed mapping of dust emission provided by past infrared missions. Such a wide frequency coverage allows us to probe the spectral energy distribution (SED) of large and cold dust grains, which are the bulk of the dust...

25. Formation signatures and carbon budget of molecular clouds

Henrik Beuther (MPIA)

22/10/2013, 14:50

contributed talk

The interstellar medium (ISM) is mainly comprised of ionized, neutral atomic and molecular gas. One of the most important constituents of these phases is carbon in its ionized/neutral/molecular form (C^+, C^0 and CO). However, until recently a coherent analysis of the different phases at adequate resolution (Jeans length ~0.2pc) is lacking. We therefore conducted at study of the spectral lines...

51. Experimental investigation of the collision properties of micrometer-sized water ice particles

Bastian Gundlach (Institut für Geophysik und extraterrestrischer Physik, TU Braunschweig)

22/10/2013, 15:05

contributed talk

Grain growth by coagulation of ice and dust particles has been postulated and observed in the densest and coldest interstellar clouds. Thus, we have performed laboratory experiments in order to simulate inter-particle collisions in these environments. The experiments were used to measure the sticking threshold of micrometer-sized water ice particles for different grain sizes, velocities, and...

96. Dust in the diffuse interstellar medium: Extinction, emission, linear and circular polarisation

Ralf Siebenmorgen (ESO)

22/10/2013, 15:20

contributed talk

We present a model for the diffuse interstellar dust that explains the observed wavelength-dependence of extinction, emission, linear and circular polarisation of light. The model is set up with a small number of parameters. It consists of a mixture of amorphous carbon and silicate grains with sizes from the molecular domain of 0.5 up to about 500nm. Dust grains with radii larger than 6nm are...

109. Dust-to-gas ratio as a clue to the galactic evolution

Svitlana Zhukovska (Max Planck Institute for Astronomy)

22/10/2013, 16:05

contributed talk

Dust grains are indispensable part of the matter cycle, which plays an important role in many physical processes in the ISM. Interstellar dust content is determined by the interplay between dust formation by stars, destruction in the ISM and dust growth by mantle accretion in the ISM. The relative importance of these processes depends on both the stage of galactic evolution and metallicity...