A sensitive search for organics (CH4, CH3OH, H2CO, C2H6, C2H2, C2H4), hydroperoxyl (HO2), nitrogen compounds (N2O, NH3, HCN) and chlorine species (HCl, CH3Cl) on Mars using ground-based high-resolution infrared spectroscopy
A sensitive search for organics (CH4, CH3OH, H2CO, C2H6, C2H2, C2H4), hydroperoxyl (HO2), nitrogen compounds (N2O, NH3, HCN) and chlorine species (HCl, CH3Cl) on Mars using ground-based high-resolution infrared spectroscopy
复制标题
使用地面高分辨率对火星上的有机物（CH4、CH3OH、H2CO、C2H6、C2H2、C2H4）、氢过氧化物（HO2）、氮化合物（N2O、NH3、HCN）和氯物质（HCl、CH3Cl）进行灵敏搜索
DOI：
10.1016/j.icarus.2012.11.013
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发表时间：
2013
期刊：
影响因子：
3.2
通讯作者：
P. Hartogh
中科院分区：
文献类型：
--
作者：
G. Villanueva;M. Mumma;R. Novak;Y. Radeva;H. Käufl;A. Smette;A. Tokunaga;A. Khayat;T. Encrenaz;P. Hartogh
火星是否正在向大气中释放有机物和其他微量气体？我们提出了一个全面的搜索火星上的痕量物种，目标是多种挥发性有机物种（CH 4，CH 3OH，H2 CO，C2 H6，C2 H2，C2 H4），氢过氧（HO 2），几个氮化合物（N2 O，NH 3，HCN），和两个氯物种（HCl，CH 3Cl）通过其振转光谱在2.8-3.7μm的光谱区域。这些数据是在4年（2006-2010年）的时间里使用高海拔观测站（VLT，Keck-2，NASA-IRTF）的强大红外高分辨率光谱仪（CRIRES，NIRSPEC，CSHELL）获得的，并且跨越了广泛的季节，多普勒频移和空间覆盖范围。在这里，我们从四个不同的日期获得的高质量光谱的选择，代表我们的搜索空间的一小部分。对于这些物种中的大多数，我们得出了有史以来最严格的上限，因为目标气体在火星大气中的驻留寿命（从几个小时到几个世纪）有很大的不同，我们的测量不仅测试当前的释放，而且还提供了严格的限制静态水平。特别是，我们对最近观察到甲烷羽流的相同区域进行了采样（例如，Syrtis Major和Valles Marineris），使我们能够测试季节和时间的变化。
Is Mars actively releasing organic and other minor gases into the atmosphere? We present a comprehensive search for trace species on Mars, targeting multiple volatile organic species (CH4, CH3OH, H2CO, C2H6, C2H2, C2H4), hydroperoxyl (HO2), several nitrogen compounds (N2O, NH3, HCN), and two chlorine species (HCl, CH3Cl) through their rovibrational spectra in the 2.8–3.7μm spectral region. The data were acquired over a period of 4years (2006–2010) using powerful infrared high-resolution spectrometers (CRIRES, NIRSPEC, CSHELL) at high-altitude observatories (VLT, Keck-2, NASA-IRTF), and span a broad range of seasons, Doppler shifts and spatial coverage. Here, we present results from a selection of high-quality spectra obtained on four separate dates, representing a fraction of our search space. For most of these species we derived the most stringent upper limits ever obtained, and because the targeted gases have substantially different resident lifetimes in the Martian atmosphere (from hours to centuries), our measurements not only test for current release but also provide stringent limits on the quiescent levels. In particular, we sampled the same regions where plumes of methane have been recently observed (e.g., Syrtis Major and Valles Marineris), allowing us to test for seasonal and temporal variability.
影响因子：
9.6
作者：
Romero-Corral, Abel;Caples, Sean M.;Somers, Virend K.
通讯作者：
Somers, Virend K.
影响因子：
4.8
作者：
Mellon, Michael T.;Arvidson, Raymond E.;Zent, Aaron P.
通讯作者：
Zent, Aaron P.