Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-12-05
AIP Conf.Proc.761:320-323,2005
Astronomy and Astrophysics
Astrophysics
4 pages, 5 figures, to appear in the proceedings of the conference "The Spectral Energy Distribution of Gas-Rich Galaxies", ed
Scientific paper
10.1063/1.1913946
A new Monte-Carlo radiative-transfer code, Sunrise, is used to study the effects of dust in N-body/hydrodynamic simulations of interacting galaxies. Dust has a profound effect on the appearance of the simulated galaxies. At peak luminosities, about 90% of the bolometric luminosity is absorbed, and the dust obscuration scales with luminosity in such a way that the brightness at UV/visual wavelengths remains roughly constant. A general relationship between the fraction of energy absorbed and the ratio of bolometric luminosity to baryonic mass is found. Comparing to observations, the simulations are found to follow a relation similar to the observed IRX-Beta relation found by Meurer et al (1999) when similar luminosity objects are considered. The highest-luminosity simulated galaxies depart from this relation and occupy the region where local (U)LIRGs are found. This agreement is contingent on the presence of Milky-Way-like dust, while SMC-like dust results in far too red a UV continuum slope to match observations. The simulations are used to study the performance of star-formation indicators in the presence of dust. The far-infrared luminosity is found to be reliable. In contrast, the H-alpha and far-UV luminosity suffer severely from dust attenuation, and dust corrections can only partially remedy the situation.
Cox Theodore J.
Jonsson Patrik
Primack Joel R.
No associations
LandOfFree
Simulations of Dust in Interacting Galaxies 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 Simulations of Dust in Interacting Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of Dust in Interacting Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-618212