Demonstration of stellar intensity interferometry with the four VERITAS telescopes
A. U. Abeysekara, W. Benbow, A. Brill, J. H. Buckley, J. L. Christiansen, A. J. Chromey, M. K. Daniel, J. Davis, A. Falcone, Q. Feng, J. P. Finley, L. Fortson, … 展开作者
A. U. Abeysekara, W. Benbow, A. Brill, J. H. Buckley, J. L. Christiansen, A. J. Chromey, M. K. Daniel, J. Davis, A. Falcone, Q. Feng, J. P. Finley, L. Fortson, A. Furniss, A. Gent, C. Giuri, O. Gueta, D. Hanna, T. Hassan, O. Hervet, J. Holder, G. Hughes, T. B. Humensky, P. Kaaret, M. Kertzman, D. Kieda, F. Krennrich, S. Kumar, T. LeBohec, T. T. Y. Lin, M. Lundy, G. Maier, N. Matthews, P. Moriarty, R. Mukherjee M. Nievas-Rosillo, S. O'Brien, R. A. Ong, A. N. Otte, K. Pfrang, M. Pohl, R. R. Prado, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, D. Ribeiro, G. T. Richards, E. Roache, J. L. Ryan, M. Santander, G. H. Sembroski, S. P. Wakely, A. Weinstein, P. Wilcox, D. A. Williams, T. J Williamson
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Accepted for publication in Nature Astronomy (2020)
High angular resolution observations at optical wavelengths provide valuable insights in stellar astrophysics, directly measuring fundamental stellar parameters, and probing stellar atmospheres, circumstellar disks, elongation of rapidly rotating stars, and pulsations of Cepheid variable stars. The angular size of most stars are of order one milli-arcsecond or less, and to spatially resolve stellar disks and features at this scale requires an optical interferometer using an array of telescopes with baselines on the order of hundreds of meters. We report on the successful implementation of a stellar intensity interferometry system developed for the four VERITAS imaging atmospheric-Cherenkov telescopes. The system was used to measure the angular diameter of the two sub-mas stars $β$ Canis Majoris and $ε$ Orionis with a precision better than 5%. The system utilizes an off-line approach where starlight intensity fluctuations recorded at each telescope are correlated post-observation. The technique can be readily scaled onto tens to hundreds of telescopes, providing a capability that has proven technically challenging to current generation optical amplitude interferometry observatories. This work demonstrates the feasibility of performing astrophysical measurements with imaging atmospheric-Cherenkov telescope arrays as intensity interferometers and the promise for integrating an intensity interferometry system within future observatories such as the Cherenkov Telescope Array.
Demonstration of Time Delay Interferometry and Spacecraft Ranging in a Space-based Gravitational Wave Detector using the UF-LISA Interferometry Simulator
On-sky demonstration of dual-field interferometry at the CHARA Array
The CHARA Array of Georgia State University Mount Wilson Observatory Mount Wilson California USA（佐治亚州立大学查拉阵列威尔逊山天文台）；Department of Astronomy University of Michigan Ann Arbor Michigan USA（密歇根大学天文学系）；School of Physics and Astronomy University of Exeter Exeter United Kingdom（埃克塞特大学物理与天文学院）；Université Côte d’Azur Observatoire de la Côte d’Azur CNRS Laboratoire Lagrange Nice France（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）
First Demonstration of Kernel Phase Interferometry on JWST/MIRI: Prospects for Future Planet Searches Around Post Main Sequence Stars
University of California, Irvine（加州大学尔湾分校）；University of California, Santa Cruz（加州大学圣克鲁兹分校）；University of Texas at Austin（德克萨斯大学奥斯汀分校）；University of Arizona（亚利桑那大学）
Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho'oea (α Lyrae) and Hokulei (α Aurigae)
Detection and Astrometry of the Ba-Bb Subsystem in $α$ Piscium: First Dual-Field Interferometry at the CHARA Array
The CHARA Array of Georgia State University（佐治亚州立大学查拉阵列）；European Organisation for Astronomical Research in the Southern Hemisphere (ESO)（欧洲南方天文台）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS（蔚蓝海岸大学蔚蓝海岸天文台法国国家科学研究中心）；Department of Astronomy, University of Michigan（密歇根大学天文学系）；Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University（佐治亚州立大学高分辨率天体测量中心及物理与天文学系）；Astrophysics Group, Department of Physics & Astronomy, University of Exeter（埃克塞特大学物理与天文学系天体物理学组）
Stellar interferometry with a K-band integrated optics beam combiner instrument at the CHARA Array - I. First on-sky fringes for CHARIOT
Corning Optical Communications GmbH & Co. KG（康宁光学通讯有限公司）；Leibniz-Institut für Astrophysik Potsdam（波茨坦阿斯特罗物理学会莱布尼茨研究所）；I. Physikalisches Institut, Universität zu Köln（科隆大学第一物理研究所）；The CHARA Array of Georgia State University（佐治亚州立大学CHARA阵列）；Institute of Photonics and Quantum Sciences, Heriot-Watt University（赫瑞-瓦特大学光子与量子科学研究所）；Humboldt-Universität zu Berlin（柏林洪堡大学）
Alternative approach to time-delay interferometry with optical frequency comb
University of Maryland, Baltimore County（马里兰大学巴尔的摩县分校）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；Center for Research and Exploration in Space Science and Technology, NASA/GSFC（NASA/戈达德太空飞行中心空间科学与技术研究探索中心）；Massachusetts Institute of Technology（麻省理工学院）；University of Arizona（亚利桑那大学）
DUG Insight: A software package for big-data analysis and visualisation, and its demonstration for passive radar space situational awareness using radio telescopes
