论文标题
大气交换在假阳性生物签名检测中的作用
The Role of Atmospheric Exchange in False-Positive Biosignature Detection
论文作者
论文摘要
土星的月球泰坦（Moon Titan）将波动液带入其大气的顶部，包括来自cryovolcanoes oceladus上的原子氧气。可以将类似的大气交换从一个身体到另一个身体，例如来自Trappist-1 D的O2和O3，可以引入Trappist-1 E的上层大气中，并可以解释为生物签名。我们通过使用耦合的1-D光化气候气候模型（ATMOS）将水和氧气的外部涌入到大气顶部来模拟Trappist-1 E上生命的潜在假阳性。此外，使用用于詹姆斯·韦伯太空望远镜的行星光谱发生器，起源太空望远镜，可居住的系室观测站和大型超紫/光学/红外测量师来测试非生物生成的O2和o3的可检测性，在存在的情况下，在存在的abiotic flofux的情况下，可以测试合成光谱观测。我们确定这些观测值中的任何一个触发对非生物O2/O3检测所需的材料的传入通量都超过两个数量级（1E12分子/cm2/s），这在物理上可能是可见的。
Saturn's Moon Titan receives volatiles into the top of its atmosphere-including atomic oxygen-sourced from cryovolcanoes on Enceladus. Similar types of atmosphere exchange from one body to another, such as O2 and O3 sourced from TRAPPIST-1 d, could be introduced into the upper atmosphere of TRAPPIST-1 e and might be interpreted as biosignatures. We simulate this potential false-positive for life on TRAPPIST-1 e, by applying an external influx of water and oxygen into the top of the atmosphere using a coupled 1-D photochemical-climate model (Atmos), to predict atmospheric composition. In addition, synthetic spectral observations are produced using the Planetary Spectrum Generator for the James Webb Space Telescope, Origins Space Telescope, Habitable Exoplanet Observatory and Large Ultra-violet/Optical/Infrared Surveyor to test the detectability of abiotic-generated O2 and O3 in the presence of abiotic and biotic surface fluxes of CH4. We determine that the incoming flux of material needed to trigger detection of abiotic O2/O3 by any of these observatories is more than two orders of magnitude (1E12 molecules/cm2/s) above what is physically plausible.
