Carlos A. Wuensche, Thyrso Villela, Elcio Abdalla, Vincenzo Liccardo, Frederico Vieira, Ian Browne, Michael W. Peel, Christopher Radcliffe, Filipe B. Abdalla, A… 展开作者
Carlos A. Wuensche, Thyrso Villela, Elcio Abdalla, Vincenzo Liccardo, Frederico Vieira, Ian Browne, Michael W. Peel, Christopher Radcliffe, Filipe B. Abdalla, Alessandro Marins, Luciano Barosi, Francisco A. Brito, Amilcar R. Queiroz, Bin Wang, Andre A. Costa, Elisa G. M. Ferreira, Karin S. F. Fornazier, Ricardo G. Landim, Camila P. Novaes, Larissa Santos, Marcelo V. dos Santos, Jiajun Zhang, Tianyue Chen, Jacques Delabrouille, Clive Dickinson, Giancarlo de Gasperis, Edmar C. Gurjão, Stuart Harper, Yin-Zhe Ma, Telmo Machado, Bruno Maffei, Eduardo J. de Mericia, Christian Monstein, Pablo Motta, Carlos H. N. Otobone, Luiz A. Reitano, Mathieu Remazeilles, Sambit Roychowdhury, João R. L. Santos, Alexandre J. R. Serres, Andreia P. Souza, Cesar Strauss, Jordany Vieira, Haiguang Xu
The measurement of diffuse 21-cm radiation from the hyperfine transition of neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers in single-dish telescopes is a challenging task. The BINGO (Baryon Acoustic Oscillations from Integrated Neutral Gas Observations) radio telescope is an instrument designed to detect baryonic acoustic oscillations (BAOs) in the cosmological HI signal, in the redshift interval $0.127 \le z \le 0.449$. This paper describes the BINGO radio telescope, including the current status of the optics, receiver, observational strategy, calibration, and the site. BINGO has been carefully designed to minimize systematics, being a transit instrument with no moving dishes and 28 horns operating in the frequency range $980 \le ν\le 1260$ MHz. Comprehensive laboratory tests were conducted for many of the BINGO subsystems and the prototypes of the receiver chain, horn, polarizer, magic tees, and transitions have been successfully tested between 2018 - 2020. The survey was designed to cover $\sim 13\%$ of the sky, with the primary mirror pointing at declination $δ=-15^{\circ}$. The telescope will see an instantaneous declination strip of $14.75^{\circ}$. The results of the prototype tests closely meet those obtained during the modeling process, suggesting BINGO will perform according to our expectations. After one year of observations with a $60\%$ duty cycle and 28 horns, BINGO should achieve an expected sensitivity of 102 $μK$ per 9.33 MHz frequency channel, one polarization, and be able to measure the HI power spectrum in a competitive time frame.
Baryon Acoustic Oscillations from Integrated Neutral Gas Observations: an instrument to observe the 21cm hydrogen line in the redshift range 0.13 $<$ z $<$ 0.45 -- status update
BINGO(BAO from Integrated Neutral Gas Observations)是一个独特的射电望远镜,旨在绘制宇宙学距离上中性氢的强度分布,首次探测到980 MHz - 1260 MHz频段的重子声学振荡(BAO),对应于红移范围$0.127 < z < 0.449$。BAO是宇宙学参数最强大的探测器之一,BINGO的设计目的是探测BAO信号,使其能够对暗能量的状态方程施加新的约束。该望远镜将在巴西帕拉伊巴建造,由两个$\thicksim$ 40米反射镜、一个由28个喇叭组成的喇叭天线阵列组成,没有移动部件,作为漂移扫描仪器工作。它将覆盖以$\sim δ=-15^{\circ}$为中心的$15^{\circ}$十度带,映射天空中的$\sim 5400$平方度。BINGO联盟由圣保罗大学牵头,国家空间研究所和Campina Grande联邦大学(巴西)共同领导。望远镜子系统已经完成了制造和测试,天线和结构制造预计将于2020年底开始,道路和地形准备也将开始。
PROVIDENCE: a ground station for space observation
ONERA – The French Aerospace Lab(法国航空航天实验室);LAM, Laboratoire d'Astrophysique de Marseille(马赛天体物理学实验室);OHP, Observatoire de Haute-Provence(上普罗旺斯天文台);EMBASE;BETEM;TMT Observatory(三十米望远镜天文台);Rubin Observatory(鲁宾天文台);Iridescence-group(Iridescence小组)
HARMONI@ELT: instrument design, performance, and science capabilities
LAM, Aix Marseille Univ., CNRS, CNES(LAM,艾克斯-马赛大学,法国国家科学研究中心,法国国家空间研究中心);Univ. of Edinburgh(爱丁堡大学);UK Astronomy Technology Centre, STFC(英国天体技术中心,英国科学与技术设施委员会);Univ. of Durham(杜伦大学);Instituto de Astrofísica de Canarias(加那利群岛天体物理研究所);University of Oxford(牛津大学);Centre de Recherche en Astrophysique de Lyon(里昂天体物理研究中心);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CAB),西班牙国家技术研究与发展总署/西班牙高等科学研究理事会);University of Michigan(密歇根大学);Institut de Planétologie et d’Astrophysique de Grenoble(格勒诺布尔行星学与天体物理学研究所)
The Wide-field Spectroscopic Telescope (WST): design trade-offs for the low-resolution multi-object spectrograph instrument
Aix-Marseille Université(艾克斯-马赛大学);CNRS(法国国家科学研究中心);CNES(法国国家空间研究中心);LAM UMR7326(天体物理与行星学研究混合单位7326);Australian Astronomical Optics(澳大利亚天文光学);Macquarie Univ.(麦考瑞大学);STFC UK Astronomy Technology Centre(英国科学与技术设施委员会英国天文技术中心);Royal Observatory Edinburgh(爱丁堡皇家天文台);Université Claude Bernard Lyon 1(里昂第一大学克洛德·贝尔纳);Centre de Recherche Astrophysique de Lyon(里昂天体物理研究中心);INAF(意大利国家天体物理研究所);Osservatorio Astronomico di Brera(布雷拉天文台);Department of Astrophysics, University of Vienna(维也纳大学天体物理学系);Leibniz-Institut für Astrophysik Potsdam (AIP)(波茨坦莱布尼茨天体物理研究所);CEA(法国原子能和替代能源委员会);European Southern Observatory(欧洲南方天文台)
Design and Testing of the Motorized 2-DoF Folding Mirror 1 for the VLT BlueMUSE Instrument
Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL)(洛桑联邦理工学院物理研究所天体物理学实验室);Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574(里昂大学、里昂第一大学、巴黎高等师范学院、法国国家科学研究中心、里昂天体物理研究中心)
Exoplanets through extreme optics: from PLATO to SHARK-NIR
在过去的几年里,帕多瓦天文台(Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Padova)和帕多瓦大学大规模参与了地面和天基系外行星搜索项目。关于我博士学位的活动在空间项目框架内和地面仪器领域都得到了利用。PLATO是“行星凌日和恒星振荡”的首字母缩写,是欧空局的一项任务,目标是利用它们在明亮恒星上的凌日来探测和表征系外行星。总体仪器布局包括一个多望远镜概念仪器,由几十个望远镜单元组成,它已经开发了一个全折射光学解决方案。这些器件的特点是具有非常大的视场(一侧>20度),光学质量可将大部分能量融入单个传感器像素。我参与了望远镜光学单元原型的组装、集成和验证(AIV),以验证AIV程序和望远镜飞行条件下的光学性能。SHARK-NIR是“具有从R到K波段的高阶自适应光学的日冕照相系统-近红外”的首字母缩写,是一种设计用于在近红外域中以日冕照相直接成像和光谱模式搜索和表征年轻系外行星系统和恒星形成区的仪器。它已被选为第二代大型双目望远镜(LBT)仪器,它将利用LBT极限自适应光学(XAO)校正的优异性能,这是SHARK-NIR实现最佳日冕性能所必需的,这是探测围绕明亮恒星运行的微弱行星的强制性要求。关于SHARK,我的工作是进行光学校准和仪器鉴定。