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The Merger-Driven Evolution of Warm Infrared Luminous Galaxies
| Content Provider | Semantic Scholar |
|---|---|
| Author | Younger, Joshua D. Hayward, C. C. Narayanan, Desika Cox, Thomas J. Hernquist, Lars Jonsson, Patrik |
| Copyright Year | 2009 |
| Abstract | We present a merger–driven evolutionary model for the produ ction of luminous (LIRGs) and ultraluminous infrared galaxies (ULIRGs) with warm IR c olours. Our results show that simulations of gas–rich major mergers including star forma tion, black hole growth, and feedback can produce warm (U)LIRGs. We also find that while the war m evolutionary phase is associated with increased AGN activity, star formation alo ne may be sufficient to produce warm IR colours. However, the transition can be suppressed e ntirely – even when there is a significant AGN contribution – when we assume a single–phase ISM, which maximizes the attenuation. Finally, our evolutionary models are consist ent with the 25–to–60μm flux density ratio vs.LHX/LIR relation for local LIRGs and ULIRGs, and predict the observe d scatter in IR color at fixedLHX/LIR. Therefore, our models suggest a cautionary note in the inte rpretation of warm IR colours: while associated with periods f active black hole growth, they are probably produced by a complex mix of star formation and A GN activity intermediate between the cold star formation dominated phase and the birt h of a bright, unobscured quasar. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://scholarship.haverford.edu/cgi/viewcontent.cgi?article=1353&context=astronomy_facpubs |
| Alternate Webpage(s) | http://arxiv.org/pdf/0904.0248v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Active galactic nucleus Biological Evolution Black Hole CD300C gene Color Erythrocyte shape:Morph:Pt:Bld:Nom Evolutionary algorithm Forma (botanical taxonomic category below variety) GUCY2C protein, human Galaxy Grid north ISM1 gene Implicit Shape Model Luminous Studio Models of DNA evolution Simulation Spectroscopy, Near-Infrared Star Wars Galaxies Stellar classification |
| Content Type | Text |
| Resource Type | Article |
