Results 31 to 40 of about 2,951,289 (298)

Phase-shift mask fabrication at micrometric scale by ion-exchange in glass for astronomical wavefront sensors [PDF]

EPJ Web of Conferences, 2020
Photolithography combined with ion-exchange in glass is a well-known technology that can be applied to develop many different optical devices. In this work, we present the complete procedure to generate small circular phase-shift masks with diameters of ...
Prieto-Blanco Xesús, Montero-Orille Carlos, González-Núñez Héctor, Moreno Vicente, Cagigal Manuel P., Liñares Jesús   +5 more
doaj   +1 more source

Demonstration of a near-IR line-referenced electro-optical laser frequency comb for precision radial velocity measurements in astronomy

Nature Communications, 2016
An important technique for discovering and characterizing planets beyond our solar system relies upon measurement of weak Doppler shifts in the spectra of host stars induced by the influence of orbiting planets. A recent advance has been the introduction
X. Yi, K. Vahala, Jiang Li, S. Diddams, S. Diddams, G. Ycas, G. Ycas, P. Plavchan, S. Leifer, J. Sandhu, G. Vasisht, Pin Chen, P. Gao, J. Gagné, E. Furlan, M. Bottom, E. Martin, M. Fitzgerald, G. Doppmann, C. Beichman   +19 more
semanticscholar   +1 more source

Optical design and active optics methods in astronomy [PDF]

Optical Review, 2013
Optical designs for astronomy involve implementation of active optics and adaptive optics from X-ray to the infrared. Developments and results of active optics methods for telescopes, spectrographs and coronagraph planet finders are presented. The high accuracy and remarkable smoothness of surfaces generated by active optics methods also allow ...
openaire   +2 more sources

Big Data Research Infrastructure Collaboration Toward the SKA (BRICSKA)

Anais da Academia Brasileira de Ciências, 2021
Astronomy is entering an era of mega-data that will render conventional research methods as well as data and visual analytics tools ineffective. The Square Kilometre Array (SKA) drives one of the most significant big data challenges of the next decades ...
RUSS TAYLOR, FABIO PORTO, CHENZHOU CUI, YOGESH WADADEKAR, OLEG MALKOV   +4 more
doaj   +1 more source

Title advances in optical fabrication for astronomy

Monthly notices of the Royal Astronomical Society, 2018
The fabrication of precision optical surfaces has undergone a revolution in recent years. The first purpose of this paper is to present case studies of novel optical designs not previously published, that utilize complex, or ‘freeform’, surfaces.
David Walker, Guoyu Yu, Hongyu Li, B. Myer, A. Beaucamp, Y. Namba, Lunzhe Wu   +6 more
semanticscholar   +1 more source

GEOLOGICAL MAPPING OF LUNAR CRATER LALANDE: TOPOGRAPHIC CONFIGURATION, MORPHOLOGY AND CRATERING PROCESS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Highland crater Lalande (4.45° S, 8.63° W; D = 23.4 km) is located on the PKT area of the lunar near side, southeast of Mare Insularum.
B. Li, B. Li, Z. C. Ling, J. Zhang, J. Chen, C. Q. Liu, X. Y. Bi   +6 more
doaj   +1 more source

Large-scale array for radio astronomy on the farside (LARAF) [PDF]

Philosophical Transactions of the Royal Society A
At the Royal Society meeting in 2023, we have mainly presented our lunar orbit array concept called DSL, and also briefly introduced a concept of a lunar surface array, LARAF.
Xuelei Chen, Feng Gao, Fengquan Wu, Yechi Zhang, Tong Wang, Weilin Liu, Dali Zou, Furen Deng, Yan Gong, Kai He, Jixia Li, Shijie Sun, Nanben Suo, Yougang Wang, Pengju Wu, Jiaqin Xu, Yidong Xu, Bin Yue, Cong Zhang, Jia Zhou, Minquan Zhou, Chenguang Zhu, Jiacong Zhu   +22 more
semanticscholar   +1 more source

Ground-Based BVRI Time-Series Follow-Up Observations for the RR Lyrae stars in Kepler Field

EPJ Web of Conferences, 2015
Time series observations for the 41 RR Lyrae stars in Kepler’s fields were carried out in 2010 to 2013 using a number of meter class (or smaller) telescopes.
Jeon Young-Beom, Ngeow Chow-Choong, Nemec James M.   +2 more
doaj   +1 more source

A Martian Analogues Library (MAL) Applicable for Tianwen-1 MarSCoDe-LIBS Data Interpretation

Remote Sensing, 2022
China’s first Mars exploration mission, named Tianwen-1, landed on Mars on 15 May 2021. The Mars Surface Composition Detector (MarSCoDe) payload onboard the Zhurong rover applied the laser-induced breakdown spectroscopy (LIBS) technique to acquire ...
Changqing Liu, Zhongchen Wu, Xiaohui Fu, Ping Liu, Yanqing Xin, Ayang Xiao, Hongchun Bai, Shangke Tian, Sheng Wan, Yiheng Liu, Enming Ju, Guobin Jin, Xuejin Lu, Xiaobin Qi, Zongcheng Ling   +14 more
doaj   +1 more source

Searching for magnetic white dwarfs in LAMOST DR10

Astronomy & Astrophysics
Aims. Magnetic white dwarfs (MWDs) are key to understanding the origin and evolution of magnetic fields in compact stars. While large spectroscopic surveys such as SDSS have greatly expanded the known sample, the potential of LAMOST has not yet been ...
Yu Si-Cheng, Ren Juan-Juan, Neustroev Vitaly V., Hackman Thomas, Zhang Hao-Tong, Dong Yi-Qiao, Bai Zhong-Rui, Yuan Hai-Long, Wang Mengxin, Zhou Ming   +9 more
doaj   +1 more source