Prebiotic precursors of the primordial RNA world in space: Detection of NH$_{2}$OH
Víctor M. Rivilla, Jesús Martín-Pintado, Izaskun Jiménez-Serra, Sergio Martín, Lucas F. Rodríguez-Almeida, Miguel A. Requena-Torres, Fernando Rico-Villas, Shaos… 展开作者
Víctor M. Rivilla, Jesús Martín-Pintado, Izaskun Jiménez-Serra, Sergio Martín, Lucas F. Rodríguez-Almeida, Miguel A. Requena-Torres, Fernando Rico-Villas, Shaoshan Zeng, Carlos Briones
One of the proposed scenarios for the origin of life is the primordial RNA world, which considers that RNA molecules were likely responsible for the storage of genetic information and the catalysis of biochemical reactions in primitive cells, before the advent of proteins and DNA. In the last decade, experiments in the field of prebiotic chemistry have shown that RNA nucleotides can be synthesized from relatively simple molecular precursors, most of which have been found in space. An important exception is hydroxylamine, NH$_2$OH, which, despite several observational attempts, it has not been detected in space yet. Here we present the first detection of NH$_2$OH in the interstellar medium towards the quiescent molecular cloud G+0.693-0.027 located in the Galactic Center. We have targeted the three groups of transitions from the $J$=2$-$1, 3$-$2, and 4$-$3 rotational lines, detecting 5 transitions that are unblended or only slightly blended. The derived molecular abundance of NH$_2$OH is (2.1$\pm$0.9)$\times$10$^{-10}$. From the comparison of the derived abundance of NH$_2$OH and chemically related species, with those predicted by chemical models and measured in laboratory experiments, we favor the formation of NH$_2$OH in the interstellar medium via hydrogenation of NO on dust grain surfaces, with possibly a contribution of ice mantle NH$_3$ oxidation processes. Further laboratory studies and quantum chemical calculations are needed to completely rule out the formation of NH$_2$OH in the gas phase.
Centro de Astrobiología（天体生物学中心）；Institute de Radioastronomie Millimétrique（毫米波射电天文学研究所）；Universidad Complutense de Madrid（马德里康普顿斯大学）；European Southern Observatory（欧洲南方天文台）；RIKEN（理化学研究所）；Towson University（陶森大学）；Instituto de Física Fundamental（基础物理研究所）；UKRI STFC（英国研究理事会科学与技术设施委员会）；NRC-Herzberg Institute（国家研究委员会赫茨伯格研究所）；Osservatorio di Arcetri（阿切特里天文台）；Venstpils University（文茨皮尔斯大学）；University of Tokyo（东京大学）；Observatorio de Yebes - OAN（耶贝斯天文台）；UPV/Biofisika Institute（巴斯克理工大学生物物理研究所）
Laboratory rotational spectroscopy and interstellar search for the protein precursor 4-oxobutanenitrile (HCOCH$_2$CH$_2$CN)
Centro de Astrobiología (CAB, CSIC-INTA)（天体生物学中心）；Universidad del País Vasco (UPV/EHU)（巴斯克大学）；Instituto Biofisika (CSIC, UPV/EHU)（生物物理研究所）；University of Bologna（博洛尼亚大学）
Chemical Complexity in the Early Stages of Star Formation in the SKAO Era
Leiden University（莱顿大学）；CNRS, IRAP（法国国家科学研究中心，天体物理研究所）；University of Vienna（维也纳大学）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理学研究所）；CNRS, IPAG（法国国家科学研究中心，格勒诺布尔行星与大气物理实验室）；University of Leeds（利兹大学）；Tata Institute of Fundamental Research（塔塔基础研究院）；University of Bern（伯尔尼大学）；National Institute of Science Education and Research（国家科学教育与研究学院）；Homi Bhabha National Institute（霍米·巴哈国家研究所）；Midnapore City College（金达普城市学院）
本文探讨SKAO（特别是SKA-Mid Band 5）如何通过高灵敏度射电观测，揭示恒星形成早期阶段的前生物分子化学复杂性，为行星系统化学继承提供新见解。
Frontiers of chemical complexity in the interstellar medium: unveiling the cosmic origins of life
Centro de Astrobiología (CAB), CSIC-INTA（天体生物学中心（CAB），西班牙国家研究委员会-国家航空航天技术研究所）；INAF-Osservatorio Astrofisico di Arcetri（意大利天文台协会阿切尔蒂天文台）；Niels Bohr Institute（尼尔斯·玻尔研究所）；University of Bordeaux（波尔多大学）；DCBP, Universität Bern（伯尔尼大学）；Univ. Grenoble Alpes（格勒诺布尔阿尔卑斯大学）；LUX, Observatoire de Paris, CNRS（巴黎天文台，法国国家科学研究中心）；ESO/JAO（欧洲南方天文台/联合天文办公室）；Univ. Toulouse, CNRS, IRAP（图卢兹大学，法国国家科学研究中心，天体物理学研究所在）；University of Sevilla（塞维利亚大学）；University of Lincoln（林肯大学）；UK Astronomy Technology Centre（英国天文技术中心）；ESO（欧洲南方天文台）；ICE-CSIC（空间科学与地球化学研究所，西班牙国家研究委员会）；Jodrell Bank Centre for Astrophysics, The University of Manchester（曼彻斯特大学乔德雷尔银行天体物理学中心）；University of Cologne（科隆大学）；RIKEN Pioneering Research Institute（理化学研究所前沿研究机构）；Univ. Florida（佛罗里达大学）；Massachusetts Institute of Technology（麻省理工学院）；Chinese Academy of Sciences South America Center for Ast（中国科学院南美天文中心）
