论文标题
用哈勃纯平行成像在z = 8-10处探测剩下框架的紫外线光度函数
Probing the Bright End of the Rest-Frame Ultraviolet Luminosity Function at z = 8-10 with Hubble Pure-Parallel Imaging
论文作者
论文摘要
寻找在早期宇宙中出生的明亮星系是研究电离时代的基础，这是第一批恒星和星系电离的时代。我们利用哈勃太空望远镜纯平行成像在大爆炸后500至6.5亿年的时间内选择星系候选者，这对应于RedShifts Z〜8-10。这些数据来自最亮的电离星系调查（BORG）周期22数据集，该数据集由在〜90种不同视线的纯平行成像组成，总计到〜420 arcmin^2的面积。该调查使用五个过滤器，并具有将成像包含在JH140频段中的优势（与周期21 BORG程序相比），涵盖了从可见光到近红外的连续波长（lambda = 0.35UM -1.7UM）。这使我们可以使用光度红移技术在Z> 8上进行可靠的星系选择。我们使用这些星系候选者来限制此时期中局部紫外线光度函数的亮端。这些候选人是后续观察的绝佳目标，尤其是詹姆斯·韦伯太空望远镜。
Looking for bright galaxies born in the early universe is fundamental to investigating the Epoch of Reionization, the era when the first stars and galaxies ionized the intergalactic medium. We utilize Hubble Space Telescope pure parallel imaging to select galaxy candidates at a time 500 to 650 million years after the Big Bang, which corresponds to redshifts z ~ 8-10. These data come from the Brightest of Reionizing Galaxies Survey (BoRG) Cycle 22 dataset, which consists of pure-parallel imaging in ~ 90 different lines of sight that sum up to an area of ~ 420 arcmin^2. This survey uses five filters and has the advantage (compared to the Cycle 21 BoRG program) of including imaging in the JH140 band, covering continuous wavelengths from the visible to near-infrared (lambda = 0.35um - 1.7um). This allows us to perform reliable selection of galaxies at z>8 using the photometric redshift technique. We use these galaxy candidates to constrain the bright end of the rest-frame ultraviolet luminosity function in this epoch. These candidates are excellent targets for follow-up observations, particularly with the James Webb Space Telescope.
