论文标题
宇宙的密集气体历史：从ASPEC到NGVLA
Dense Gas History of the Universe: from ASPECS to the ngVLA
论文作者
论文摘要
我们回顾了宇宙平均分子气体密度的演变，即使用CO的旋转过渡的观察结果。分子气体是星系中恒星形成的燃料。对遥远星系的CO排放的深入搜索已将分子气的密度划分为$ z \ sim 5 $，或者在大爆炸的1〜GYR之内。结果表明，与宇宙恒星形成速率密度的上升和下降的气体密度和可能驱动的升高和下降。我们提出了下一代非常大的阵列的潜力，以图像早期星系中分子气的分布和动力学，并精确地测量宇宙的密集气体历史。
We review the evolution of the cosmic average molecular gas density to large look-back times, using observations of rotational transitions of CO. Molecular gas is the fuel for star formation in galaxies. Deep searches for CO emission from distant galaxies have delineated the density of molecular gas back to $z \sim 5$, or within 1~Gyr of the Big Bang. The results show a rise and fall in the gas density that parallels, and likely drives, the rise and fall of the cosmic star formation rate density. We present the potential for the next generation Very Large Array to image the distribution and dynamics of the molecular gas in early galaxies, and to make a precise measurement of the dense gas history of the Universe.
