Physical processes in the ISM

Session

Cosmic rays and their impact on the ISM

25 Oct 2013, 09:00

MPE

Conveners

Cosmic rays and their impact on the ISM

• Ellen Gould Zweibel

132. Cosmic rays and their impact on the ISM

Tsuyoshi Inoue (Aoyama Gakuin University)

25/10/2013, 09:00

review talk

33. Cosmic ray propagation in molecular clouds

Sabrina Casanova (MPIK, Heidelberg)

25/10/2013, 09:40

contributed talk

We solve the transport equations of cosmic rays inside a molecular cloud assuming an arbitrary energy and space dependent diffusion coefficient. Cosmic rays penetrating the cloud produce gamma-ray emission through pp collisions with the ambient gas. For small diffusion coefficients inside the cloud we expect the gamma-ray spectrum from the cloud to be harder than the Galactic diffuse emission...

47. Cosmic ray driven Galactic outflows and the evolution of cosmic ray spectra

Philipp Girichidis (MPA Garching)

25/10/2013, 09:55

contributed talk

We explore the impact of cosmic rays (CR) on the structure of the ISM, the turbulence in the Galactic disk, and how/to what extent cosmic rays drive Galactic outflows. We include the production of cosmic rays in SN remnants in a stratified box and follow the coupled system of gas and cosmic ray fluid self-consistently in three-dimensional adaptive mesh refinement simulations. The coupled...

48. The cosmic-ray ionization rate in the Central parsec of the Galaxy

Miwa Goto (USM/LMU)

25/10/2013, 10:10

contributed talk

Cosmic ray is a unique place that high-energy astrophysics meets low-energy chemistry. The ion molecule H3+ is the best chemical probe of the cosmic ray ionization rate, because of the simplicity of the chemical process. Meanwhile, a new gamma-ray observation identified a point like source near Sgr A*. To produce the gamma-ray flux discovered by HESS collaboration by a neutral pion decay, one...

107. Probing cosmic rays in nearby giant molecular clouds with the Fermi Large Area Telescope

Ruizhi Yang (Purple Mountain Observatory)

25/10/2013, 10:25

contributed talk

We report the results of our study on the energy spectra and absolute fluxes of cosmic rays (CRs) in the Local Galaxy based on three-year $\gamma$-ray observations of ten nearby giant molecular clouds (GMCs) belongs to the Gould Belt, with the Fermi Large Area Telescope (LAT). The $\gamma$-ray signals obtained with high statistical significance allow the determination of $\gamma$-ray spectra...