Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-02
Astronomy and Astrophysics
Astrophysics
10 pages, 6 figures, latex, with MN-macros, accepted by MNRAS - revised version (changed flux values for some galaxies)
Scientific paper
10.1046/j.1365-8711.2000.03150.x
We present new data taken at 850 $\mu$m with SCUBA at the JCMT for a sample of 19 luminous infrared galaxies. Fourteen galaxies were detected. We have used these data, together with fluxes at 25, 60 and 100 $\mu$m from IRAS, to model the dust emission. We find that the emission from most galaxies can be described by an optically thin, single temperature dust model with an exponent of the dust extinction coefficient ($k_\lambda \propto \lambda^{-\beta}$) of $\beta \simeq 1.5 - 2$. A lower $\beta\simeq 1$ is required to model the dust emission from two of the galaxies, Arp 220 and NGC 4418. We discuss various possibilities for this difference and conclude that the most likely is a high dust opacity. In addition, we compare the molecular gas mass derived from the dust emission, $M_{dust}$, with the molecular gas mass derived from the CO emission, $M_{CO}$, and find that $M_{CO}$ is on average a factor 3 higher than $M_{dust}$.
Hills Richard
Isaak Kate G.
Lisenfeld Ute
No associations
LandOfFree
Dust and gas in luminous infrared galaxies - results from SCUBA observations 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 and gas in luminous infrared galaxies - results from SCUBA observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust and gas in luminous infrared galaxies - results from SCUBA observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-581296