Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Display Documents



ID: 13501.0, MPI für Astrophysik / Cosmology
The relation of PAH strength with cold dust in galaxies
Authors:Haas, M.; Klaas, U.; Bianchi, S.
Language:English
Date of Publication (YYYY-MM-DD):2002-04
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Volume:385
Issue / Number:3
Start Page:L23
End Page:L26
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Mid-infrared spectra and submillimetre maps are investigated for five galaxies covering a range of star forming activity. We find a good spatial coincidence between the 850 mum continuum emission and the strength of the PAH 7.7 mum line. The PAH 7.7 mum peak to 850 mum flux ratio lies in the range around 2 with a moderate dispersion across the galaxies. Both PAH and cold dust emission correlate also with the emission from very small grains at 14.3 mum, but regions with starbursts show an excess in the very small grain emission. This suggests that the PAH carriers are preferentially related to the regions dominated by cold dust and molecular clouds, where they are excited mainly by the interstellar radiation field. The lack of increased PAH/submm ratio in starburst knots suggests that starbursts play a minor role for powering the PAH emission in galaxies.
Free Keywords:galaxies : NGC891; NGC1569; NGC6946; NGC7331; Arp 244; ISM; infrared : galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astrophysik
External Affiliations:Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg,; Germany; Max Planck Inst Astron, D-69117 Heidelberg, Germany; Max Planck Inst Astrophys, D-85741 Garching, Germany; European So Observ, D-85748 Garching, Germany
Identifiers:ISI:000174901700002
ISSN:1432-0746
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.