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Physical processes in the ISM

21–25 Oct 2013
MPE
Europe/Berlin timezone

Session

Poster Session: Chemical processes in the ISM (Poster 27-30)

23 Oct 2013, 09:00
MPE

MPE

Gießenbachstraße 1 85748 Garching

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  1. 31. H2 formation in astrophysical models: the effect of dust temperature fluctuations
    Emeric Bron (LUTH - Observatoire de Paris/Université Paris Diderot)
    23/10/2013, 09:00
    Poster
    The process of H2 formation on dust grains is the first step in the increase in chemical complexity leading to the multitude of molecules revealed by the latest generation of telescopes. It controls the transition from atomic to molecular gas and the resulting molecular chemistry through the central role of H2 in the chemical network. The formation rate in a diffuse medium has been inferred...
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  2. 89. Physical Conditions in Shocked Clouds of the Vela Supernova Remnant: New Results from High-Resolution HST/STIS Observations of HD 72350 and HD 72648
    Adam Ritchey (University of Washington)
    23/10/2013, 09:00
    Poster
    We present a detailed analysis of the physical conditions in shocked interstellar clouds along two lines of sight through the Vela supernova remnant using new high-resolution HST/STIS spectra acquired at FUV wavelengths. From the relative populations of collisionally-excited fine-structure levels in C I and O I, we derive unique solutions for the gas density and kinetic temperature in discrete...
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  3. 10. Stellar Sources of Interstellar Dust: Molecular TiC Clusters in Dust Nucleation Processes
    23/10/2013, 09:00
    Poster
    Dust particles have an important impact on the astrophysics of the interstellar medium (ISM) ranging from chemistry and thermodynamics of the gas up to the dynamics of star formation. The life-cycle of interstellar dust begins with the nucleation and growth of grains in explosive ejecta or steady winds of stars. Investigations of pre-solar grains enclosed in meteorites, for example, revealed...
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  4. 44. The chemical evolution in the early phases of massive star formation
    Thomas Gerner (MPIA)
    23/10/2013, 09:00
    Poster
    Understanding the chemical evolution of young (high-mass) star-forming regions is a central topic in star formation research. The chemistry is employed as a unique tool: 1) to investigate the underlying physical processes and 2) to characterize the evolution of the chemical composition. With these aims in mind, we observed a sample of 59 high-mass star-forming regions at different evolutionary...
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