标题： 超新星宇宙学与ESSENCE项目 显示英文标题

标题： Supernova Cosmology and the ESSENCE project

摘要： Ia 型超新星（SNe Ia）作为距离指示器的正确使用彻底改变了宇宙学，并为宇宙的能量密度增添了新的主导成分——暗能量。 在发现和确认阶段之后，目前正在进行的 SNe Ia 巡天旨在确定暗能量的性质。 ESSENCE 是一项为期五年的基于地面的超新星巡天，目标是在红移域 z=[0.2-0.8] 范围内找到并分析 200 颗 SNe Ia。 该项目的目标是以 <10% 的精度限制暗能量的状态方程参数 w。 本文介绍了这些正在进行的努力，并将其置于当前观测宇宙学发展的背景下。 显示英文摘要

摘要： The proper usage of Type Ia supernovae (SNe Ia) as distance indicators has revolutionized cosmology, and added a new dominant component to the energy density of the Universe, dark energy. Following the discovery and confirmation era, the currently ongoing SNe Ia surveys aim to determine the properties of the dark energy. ESSENCE is a five year ground-based supernova survey aimed at finding and characterizing 200 SNe Ia in the redshift domain z=[0.2-0.8]. The goal of the project is to put constraints on the equation of state parameter, w, of the dark energy with an accuracy of <10%. This paper presents these ongoing efforts in the context of the current developments in observational cosmology.