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Photometric evolution of dusty starburst mergers : On the nature of ultra-luminous infrared galaxies
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bekki, Kenji |
| Copyright Year | 2000 |
| Abstract | By performing N-body simulations of chemodynamical evolution of galaxies with dusty starbursts, we investigate photometric evolution of gas-rich major mergers in order to explore the nature of ultraluminous infrared galaxies (ULIRGs) with the total infrared luminosity (LIR for 8 ∼ 1000 μm) of ∼ 10 L . Main results are the following five. (1) Global colors and absolute magnitudes the during dusty starburst of a major merger do not change with time significantly, because interstellar dust heavily obscures young starburst populations that could cause rapid evolution of photometric properties of the merger. (2) Dust extinction of stellar populations in a galaxy merger with large infrared luminosity (LIR > 10 11 L ) is selective in the sense that younger stellar populations are preferentially obscured by dust than old ones. This is because younger populations are located in the central region where a larger amount of dusty interstellar gas can be transferred from the outer gas-rich regions of the merger. (3) Both LIR and the ratio of LIR to B band luminosity (LB) increases as the star formation rate increase during the starburst of the present merger model, resulting in the positive correlation between LIR and LIR/LB. The dust temperature Tdust and the flux ratio of f60μm/f100μm also increase with the increase of the star formation rate, because a larger number of young stars formed by massive starburst can heat the dusty interstellar gas as the star formation becomes larger. (4) The star formation efficiency, total gas mass, the degree of dust extinction (AV ), Tdust, LIR, LIR/LB, and f60μm/f100μm depend strongly on the separation of |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/astro-ph/0012365v1.pdf |
| Alternate Webpage(s) | http://cds.cern.ch/record/481085/files/0012365.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anteroventral Thalamic Nucleus CD300C gene Color Cosmic Dust Extinction, Psychological GUCY2C protein, human Large Lattice Boltzmann methods Luminous Studio One Thousand Photometry Population Quantum well infrared photodetector Simulation Spectroscopy, Near-Infrared Stars, Celestial Stellar (payment network) |
| Content Type | Text |
| Resource Type | Article |
