Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6416p&link_type=abstract
American Astronomical Society Meeting 207, #64.16; Bulletin of the American Astronomical Society, Vol. 37, p.1259
Astronomy and Astrophysics
Astronomy
Scientific paper
The near and mid-IR spectrum of the IRAS bright galaxy, IRAS 08572 +3915 is dominated by hydrocarbon dust similar in composition to the diffuse ISM in our own galaxy. For the first time, moderately high S/N data with good spectral profile information are provided for the near and mid IR hydrocarbon bands compared towards the same line of sight. Dust composition and powerhouse mechanisms are implicated as a result. The lack of detectable ice suggests the dense cloud fraction in the diffuse to dense ratio for this galaxy is minimal at best. A long standing debate concerning the origin of the energy source in such galaxies has suggested AGN or Starburst activity. The lack of dense clouds, and hence star forming regions, may offer support of an obscured AGN as the energy source in this case. In contrast, the strong crystalline substructure in the deep silicate absorption band may indicate recent Starburst activity. IRAS 08572 is a deeply obscured ultra-luminous infrared galaxy, emitting the bulk of its luminosity in the infrared. As such, it may serve as a beacon for understanding the chemistry in ULIRGs and galaxy mergers in general, and give insight into the relative importance of a combination of central energy sources.
Allamandola Louis J.
Keane Jacqueline V.
Mason Rachel
Pendleton Yvonne J.
Spoon Henrik
No associations
LandOfFree
Dust Chemistry in Galactic and Extragalactic Environments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dust Chemistry in Galactic and Extragalactic Environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust Chemistry in Galactic and Extragalactic Environments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1280695