论文标题
金星大气中的磷酸：索非亚的严格上限
Phosphine in the Venusian Atmosphere: A Strict Upper Limit from SOFIA GREAT Observations
论文作者
论文摘要
Greaves等人报道了在金星大气中的磷氨酸（pH $ _3 $）的存在。 （2021a），基于使用地面的，毫米波光谱的J = 1-0在267 GHz下的J = 1-0转变的观察结果。这一意外发现给我们理解金星大气的挑战带来了挑战，并导致对大气中磷气体的可能来源和下沉进行了重新评估。在这里，我们在2021年11月进行的三起航班上使用优质的索非亚飞机上的优秀仪器在金星上搜索ph $ _3 $的结果。多个pH $ _3 $过渡是针对533 GHz和1067 GHz的频率的，但未检测到大气pH $ _3 $的证据。通过辐射转移建模，我们在75-110 km的高度范围内得出了盘式上的磁盘平均上限为0.8 ppb，这比以前的基于地面的研究更为严格。
The presence of phosphine (PH$_3$) in the atmosphere of Venus was reported by Greaves et al. (2021a), based on observations of the J=1-0 transition at 267 GHz using ground-based, millimeter-wave spectroscopy. This unexpected discovery presents a challenge for our understanding of Venus's atmosphere, and has led to a reappraisal of the possible sources and sinks of atmospheric phosphorous-bearing gases. Here we present results from a search for PH$_3$ on Venus using the GREAT instrument aboard the SOFIA aircraft, over three flights conducted in November 2021. Multiple PH$_3$ transitions were targeted at frequencies centered on 533 GHz and 1067 GHz, but no evidence for atmospheric PH$_3$ was detected. Through radiative transfer modeling, we derived a disk-averaged upper limit on the PH$_3$ abundance of 0.8 ppb in the altitude range 75-110 km, which is more stringent than previous ground-based studies.
