论文标题
CN 2-1和CS 5-4观察到SMA的ARP 299
CN 2-1 and CS 5-4 observations toward Arp 299 with the SMA
论文作者
论文摘要
密集气体是了解星系中星形成的关键。我们提出了CN 2-1和CS 5-4的高分辨率（$ \ sim3'' $），作为朝向ARP 299的密集的气体示踪剂，这是星系中期的主要合并，带有亚毫米阵列（SMA）。 CN 2-1和CS 5-4的空间分布通常彼此一致，以及文献中的HCN 1-0。然而，在A，B和C区域中发现了CS 5-4和CN 2-1的不同线比，在B.密度的气体分数中最高的价值从IC 694（a）降低到NGC 3690（b）和重叠的Starburst区域（C和C $'$），这指示了该杂物在A和B中的99个地区，这表明了9和B的越过by 9和B的越过by 9的越过。
Dense gas is the key for understanding star formation in galaxies. We present high resolution ($\sim3''$) observations of CN 2-1 and CS 5-4 as dense gas tracers toward Arp 299, a mid stage major merger of galaxies, with the Submillimeter Array (SMA). The spatial distribution of CN 2-1 and CS 5-4 are generally consistent with each other, as well as HCN 1-0 in literature. However, different line ratios of CS 5-4 and CN 2-1 are found in A, B, and C regions, with highest value in B. Dense gas fraction decreases from IC 694 (A), to NGC 3690 (B) and the overlap starburst region (C and C$'$), which indicates that circum-nuclear upcoming starburst in A and B will be more efficient than that in the overlap region of Arp 299.
