Models for Multiband Infrared Surveys
| Autor: | David L. Shupe, JoAnn O'Linger, Frank J. Masci, Carol J. Lonsdale, Cong Xu |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Spectral density Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Redshift Galaxy Space and Planetary Science Galaxy formation and evolution medicine Astrophysics::Solar and Stellar Astrophysics Satellite medicine.symptom Astrophysics::Galaxy Astrophysics Confusion |
| Zdroj: | The Astrophysical Journal. 562:179-207 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | Empirical 'backward' galaxy evolution models for IR-bright galaxies are constrained using multiband IR surveys. A new Monte-Carlo algorithm is developed for this task. It exploits a large library of realistic Spectral Energy Distributions (SEDs) of 837 local IR galaxies (IRAS 25$\mu m$ selected) from the UV (1000{\AA}) to the radio (20cm), including ISO-measured 3--13$\mu m$ unidentified broad features (UIBs). The basic assumption is that the local correlation between SEDs and Mid-Infrared (MIR) luminosities can be applied to earlier epochs of the Universe. Three populations of IR sources are considered in the evolution models. These include (1) starburst galaxies, (2) normal late-type galaxies, and (3) galaxies with AGN. A set of models so constructed are compared with data from the literature. Predictions for number counts, confusion limits, redshift distributions, and color-color diagrams are made for multiband surveys using the upcoming SIRTF satellite. |
| Databáze: | OpenAIRE |
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