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arXiv 0809.2612astro-ph
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Ia型超新星和宇宙的加速:来自ESSENCE超新星调查的结果

Type Ia supernovae and the acceleration of the universe: results from the ESSENCE Supernova Survey

Kevin Krisciunas

摘要:

ESSENCE项目是一个为期六年的超新星搜索,使用CTIO 4米望远镜进行。我们还用许多世界上最大的地面望远镜获得了光谱,并用哈勃太空望远镜和斯皮策太空望远镜观察了我们的一些SNe。我们实现了在红移范围0.2至0.8内发现200多个Ia型超新星的目标。利用这些数据,我们确定宇宙状态方程参数为+/-10%。这些数据与一个几何平坦的宇宙相一致,其暗能量相当于爱因斯坦的宇宙学常数。

英文摘要:

The ESSENCE project was a six year supernova search carried out with the CTIO 4-m telescope. We also obtained spectra with many of the world's largest ground-based telescopes and observed some of our SNe with the Hubble Space Telescope and the Spitzer Space Telescope. We achieved our goal of discovering over 200 Type Ia SNe in the redshift range 0.2 to 0.8. With these data we determined the cosmic equation of state parameter to +/- 10 percent. The data are consistent with a geometrically flat universe whose dark energy is equivalent to Einstein's cosmological constant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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