随机线性偏置的时间演化：来自相互作用星系在线性尺度上的研究
摘要
我们将 Tegmark & Peebles (1998) 的时间依赖偏置模型推广到预测不同星系 Population 相对于暗物质及彼此之间随机线性偏置的大尺度演化。 resulting model equations contain a general expression, coined the "interaction term", accounting for the destruction or production of galaxies. This term may be used to model couplings between different populations that lead to an increase or decrease of the number of a galaxies belonging to a population, e.g. passive evolution or merging processes. This is explored in detail using a toy model. In particular, it is shown that the presence of such a coupling may change the evolution of the bias parameter compared to an interaction-free evolution. We argue that the observation of the evolution of the large-scale bias and galaxy number density with wide-field surveys may be used to infer fundamental interaction parameters between galaxy populations, possibly giving an insight in their formation and evolution.
引用
@article{arxiv.astro-ph/0409435,
title = {Time evolution of the stochastic linear bias of interacting galaxies on linear scales},
author = {Patrick Simon},
journal= {arXiv preprint arXiv:astro-ph/0409435},
year = {2009}
}
备注
18 pages, 7 figures, minor changes, accepted by A&A