Asgard/NOTT: L-band nulling interferometry at the VLTI I. Simulating the expected high-contrast performance
Romain Laugier, Denis Defrère, Benjamin Courtney-Barrer, Felix A. Dannert, Alexis Matter, Colin Dandumont, Simon Gross, Olivier Absil, Azzurra Bigioli, Germain … 展开作者
Romain Laugier, Denis Defrère, Benjamin Courtney-Barrer, Felix A. Dannert, Alexis Matter, Colin Dandumont, Simon Gross, Olivier Absil, Azzurra Bigioli, Germain Garreau, Lucas Labadie, Jérôme Loicq, Marc-Antoine Martinod, Alexandra Mazzoli, Gert Raskin, Ahmed Sanny
Context: NOTT (formerly Hi-5) is a new high-contrast L' band (3.5-4.0 \textmu m) beam combiner for the VLTI with the ambitious goal to be sensitive to young giant exoplanets down to 5 mas separation around nearby stars. The performance of nulling interferometers in these wavelengths is affected both by fundamental noise from the background and by the contributions of instrumental noises. This motivates the development of end-to-end simulations to optimize these instruments. Aims: To enable the performance evaluation and inform the design of such instruments on the current and future infrastructures, taking into account the different sources of noise, and their correlation. Methods: SCIFYsim is an end-to-end simulator for single mode filtered beam combiners, with an emphasis on nulling interferometers. It is used to compute a covariance matrix of the errors. Statistical detection tests based on likelihood ratios are then used to compute compound detection limits for the instrument. Results: With the current assumptions on the performance of the wavefront correction systems, the errors are dominated by correlated instrumental errors down to stars of magnitude 6-7 in the L band, beyond which thermal background from the telescopes and relay system becomes dominant. Conclusions: SCIFYsim is suited to anticipate some of the challenges of design, tuning, operation and signal processing for integrated optics beam combiners. The detection limits found for this early version of NOTT simulation with the unit telescopes are compatible with detections at contrasts up to $10^5$ in the L band at separations of 5 to 80 mas around bright stars.
Performance Analysis of the Asgard/NOTT Nulling Interferometer: Optimizing Observing Modes for High-contrast Detection
The University of Arizona（亚利桑那大学）；Large Binocular Telescope Observatory, The University of Arizona（大双筒望远镜天文台，亚利桑那大学）；KU Leuven（荷语鲁汶大学）；Université Grenoble Alpes, CNRS, IPAG（格勒诺布尔阿尔卑斯大学，法国国家科学研究中心，天体物理与行星学研究所）；ETH Zürich, Institute for Particle Physics & Astrophysics（苏黎世联邦理工学院，粒子物理与天体物理研究所）；European Southern Observatory（欧洲南方天文台）；Australian National University（澳大利亚国立大学）；Ghent University（根特大学）；University of Exeter（埃克塞特大学）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学，蔚蓝海岸天文台，法国国家科学研究中心，拉格朗日实验室）；University of Kiel（基尔大学）
Asgard/NOTT: L-band nulling interferometry at the VLTI -- III. The mid-infrared integrated optics beam combiner for NOTT
I. Physikalisches Institut der Universität zu Köln（科隆大学第一物理研究所）；Department of Physics & Astronomy, University of California, Los Angeles（加州大学洛杉矶分校物理与天文学系）；Institute of Astronomy, KU Leuven（鲁汶大学天体物理研究所）
Status and performance of the Asgard/NOTT cold nulling camera
KU Leuven（荷语鲁汶大学）；Fornax（福纳克斯研究所）；University of Liège（列日大学）；Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences（孔科利天文台，匈牙利研究与教育网络天文学与地球科学研究中心）；Australian National University（澳大利亚国立大学）；Delft University of Technology（代尔夫特理工大学）；University of Arizona（亚利桑那大学）；University of Exeter（埃克塞特大学）；Université Côte d’Azur（蔚蓝海岸大学）；European Organisation for Astronomical Research in the Southern Hemisphere（欧洲南方天文台）；Large Binocular Telescope Observatory（大型双筒望远镜天文台）
Asgard/NOTT: Cryogenic characterization of the mid-infrared chip
ETH Zürich（苏黎世联邦理工学院）；KU Leuven（荷语鲁汶大学）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心、拉格朗日实验室）；The University of Arizona（亚利桑那大学）；Large Binocular Telescope Observatory（大型双筒望远镜天文台）；Macquarie University（麦考瑞大学）；European Southern Observatory（欧洲南方天文台）；Australian National University（澳大利亚国立大学）；Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences（孔科利天文台，匈牙利研究与教育网络天文学与地球科学研究中心）；University of Exeter（埃克塞特大学）；Universität zu Köln（科隆大学）；STAR Institute, University of Liège（列日大学STAR研究所）
Asgard/NOTT: Status of laboratory nulling performance
ETH Zürich, Institute for Particle Physics & Astrophysics（苏黎世联邦理工学院粒子物理与天体物理研究所）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心拉格朗日实验室）；European Southern Observatory（欧洲南方天文台）；Large Binocular Telescope Observatory, The University of Arizona（大型双筒望远镜天文台，亚利桑那大学）
Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans
Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学、蔚蓝海岸天文台、法国国家科学研究中心、拉格朗日实验室）；Research School of Astronomy and Astrophysics, College of Science, Australian National University（澳大利亚国立大学理学院天文学与天体物理学家研究学院）；School of Physics and Astronomy, University of Exeter（埃克塞特大学物理与天文学院）；Institute of Astronomy, KU Leuven（鲁汶大学天文学研究所）；Space sciences, Technologies & Astrophysics Research (STAR) Institute, University of Liège（列日大学空间科学与技术天体物理研究（STAR）研究所）；Institute for Particle Physics and Astrophysics, ETH Zurich（苏黎世联邦理工学院粒子物理与天体物理研究所）；Department of Astronomy and Steward Observatory（天文学系及斯图尔德天文台）；Large Binocular Telescope Observatory（大型双筒望远镜天文台）；I. Physikalisches Institut, Universität zu Köln（科隆大学第一物理研究所）；European Organisation for Astronomical Research in the Southern Hemisphere（欧洲南方天文台）；Max-Planck-Institut für Astronomie（马克斯·普朗克天文学研究所）；Konkoly Observatory（孔科利天文台）；University of California, Los Angeles（加州大学洛杉矶分校）；Leiden Observatory, Leiden University（莱顿大学莱顿天文台）；Australian Astronomical Optics & School of Mathematical and Physical Sciences, Macquarie University（麦考瑞大学澳大利亚天文光学部及数学与物理科学学院）；Research Software Engineering, NUIT, Newcastle University（纽卡斯尔大学NUIT研究软件工程）
Seidr update: photonic 'black magic' for high-contrast interferometry using kernel-nulling and photonic lanterns
University of Sydney（悉尼大学）；Observatoire de la Cote d’Azur, Université Côte d’Azur（蔚蓝海岸天文台，蔚蓝海岸大学）；Australian National University（澳大利亚国立大学）；University of Exeter（埃克塞特大学）；Leiden University（莱顿大学）
Achieving efficient broadband spatial filtering for LIFE: status and plan
ETH Zürich（苏黎世联邦理工学院）；Leiden Observatory, Leiden University（莱顿大学莱顿天文台）；Sydney Institute for Astronomy, School of Physics, University of Sydney（悉尼大学物理学院天体物理研究所）；Research School of Astronomy & Astrophysics, Australian National University（澳大利亚国立大学天文与天体物理研究学院）
