1 / 6

Gas and mm Dust emission

Gas and mm Dust emission. François Boulanger et Guilaine Lagache (Institut d ’Astrophysique Spatiale, Orsay). Tracing diffuse ISM components in te Solar Neighborhood and across the Galaxy with mm dust emission mm dust properties across the HI/H2 transition. Gas Tracers.

howie
Télécharger la présentation

Gas and mm Dust emission

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gas and mm Dust emission François Boulanger et Guilaine Lagache (Institut d ’Astrophysique Spatiale, Orsay) • Tracing diffuse ISM components in te Solar Neighborhood and across the Galaxy with mm dust emission • mm dust properties across the HI/H2 transition

  2. Gas Tracers • DiffuseH II : Pulsar dispersion measure • H I : 21 cm Line • Misses cold H I • H2: CO low J rotational lines • several caveats: optical thickness, CO photo-dissociation • Misses « diffuse » H2 (seen in absorption and in gamma rays) • Dust : H I and H2 • Extinction: clumping • Far-IR emission per dust mass is temperature dependent • mm dust emission: Matter Tracer • Galaxies and star forming cores (ground telescopes) <=> diffuse ISM • Dust emissivity: How constant across the HII/HI/Diffuse H2/CO transitions?

  3. IR-HI Correlation at 1.2mm FIRAS + HI all-sky survey

  4. Molecular Gas

  5. Longitude Profile

  6. HI/H2 Transition Solar Neighorhood H2 self-shielding: HI  H2 pour NH> 5 1020 H/cm2 Savage et al. 1977

More Related