期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 340, 期 3, 页码 739-746出版社
OXFORD UNIV PRESS
DOI: 10.1046/j.1365-8711.2003.06318.x
关键词
galaxies : evolution; galaxies : high-redshift; galaxies : luminosity function, mass function; galaxies : starburst; infrared : galaxies; submillimetre
Previous modelling has demonstrated that it is difficult to reproduce the SCUBA source counts within the framework of standard hierarchical structure formation models if the sources are assumed to be the high-redshift counterparts of local ultraluminous infrared galaxies with dust temperatures in the range 40-60 K. Here, we show that the counts are more easily reproduced in a model in which the bulk of the submillimetre emission comes from extended, cool (20-25 K) dust in objects with star formation rates of 50-100 M. yr(-1). The low temperatures imply typical sizes of similar to1 (S-850/1 mJy)(1/2) arcsec, a factor of 2-3 larger than those predicted using starburst-like spectral energy distributions. Low dust temperatures also imply a ratio of optical/ultraviolet to 850-mum flux that is 30-100 times smaller, for the same optical depth, than expected for objects with a hot, starburst-like spectral energy distribution. This may help to explain the small overlap between SCUBA sources and Lyman-break galaxies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据