论文标题
LKCA 15和MWC 480个原始磁盘的无偏ALMA光谱调查
An unbiased ALMA spectral survey of the LkCa 15 and MWC 480 protoplanetary disks
论文作者
论文摘要
原星盘的挥发性含量都为行星化学树立了潜力，并提供了定义磁盘系统特征（例如恒星质量，气体质量，电离和温度结构）的有价值的探针。但是，当前的磁盘分子库存是分散的，但是，不完整的图片：需要无偏的光谱线调查来评估挥发性含量。我们在这里介绍了Herbig Ae Star MWC 480和Alma Band 7中的Tauri Star LKCA 15的原理磁盘的调查概述，跨越了275--317 GHz的$ 36 GHz，并表示比以前的单次Surve的敏感性增加。我们检测到14种分子物种（包括同位素），有5种（C $^{34} $ S，$^{13} $ CS，H $ _ {2} $ CS，DNC和C $ _2 $ D）在Protoplanetary Disks中首次检测到。在MWC〜480和LKCA〜15的分子清单中观察到显着差异，我们讨论如何根据这两个磁盘系统的不同物理条件来解释这些结果。
The volatile contents of protoplanetary disks both set the potential for planetary chemistry and provide valuable probes of defining disk system characteristics such as stellar mass, gas mass, ionization, and temperature structure. Current disk molecular inventories are fragmented, however, giving an incomplete picture: unbiased spectral line surveys are needed to assess the volatile content. We present here an overview of such a survey of the protoplanetary disks around the Herbig Ae star MWC 480 and the T Tauri star LkCa 15 in ALMA Band 7, spanning $\sim$36 GHz from 275--317 GHz and representing an order of magnitude increase in sensitivity over previous single-dish surveys. We detect 14 molecular species (including isotopologues), with 5 species (C$^{34}$S, $^{13}$CS, H$_{2}$CS, DNC, and C$_2$D) detected for the first time in protoplanetary disks. Significant differences are observed in the molecular inventories of MWC~480 and LkCa~15, and we discuss how these results may be interpreted in light of the different physical conditions of these two disk systems.
