标题： 宇宙学对当前CMB和SN 1a数据的限制：蛮力8参数分析 显示英文标题

标题： Cosmological constraints from current CMB and SN 1a data: a brute force 8 parameter analysis

摘要： 我们描述了最近的宇宙微波背景（CMB）和超新星Ia（SN1a）数据对一个包含8个参数的标准开宇宙冷暗物质（CDM）模型的限制。 我们的参数包括：冷暗物质、重子物质、真空能量以及曲率的密度，再电离光学深度，以及标量和张量涨落的归一化和倾斜。 我们发现，尽管再电离过程和引力波的可能性大大削弱了对冷暗物质和重子密度、倾斜、哈勃常数和曲率的限制，允许例如闭合宇宙的存在，但具有消失宇宙学常数的开宇宙模型仍然被强烈排斥。 显示英文摘要

摘要： We describe constraints on a ``standard'' 8 parameter open cold dark matter (CDM) model from the most recent CMB and SN1a data. Our parameters are the densities of CDM, baryons, vacuum energy and curvature, the reionization optical depth, and the normalization and tilt for both scalar and tensor fluctuations. We find that although the possibility of reionization and gravity waves substantially weakens the constraints on CDM and baryon density, tilt, Hubble constant and curvature, allowing e.g. a closed Universe, open models with vanishing cosmological constant are still strongly disfavored.