Results 21 to 30 of about 6,760,588 (269)

Persistent homology in cosmic shear: Constraining parameters with topological data analysis [PDF]

Astronomy & Astrophysics, 2020
In recent years, cosmic shear has emerged as a powerful tool for studying the statistical distribution of matter in our Universe. Apart from the standard two-point correlation functions, several alternative methods such as peak count statistics offer ...
Sven Heydenreich, B. Bruck, J. Harnois-D'eraps   +2 more
semanticscholar   +1 more source

Data Combination: Interferometry and Single-dish Imaging in Radio Astronomy [PDF]

Publications of the Astronomical Society of the Pacific, 2023
Modern interferometers routinely provide radio-astronomical images down to subarcsecond resolution. However, interferometers filter out spatial scales larger than those sampled by the shortest baselines, which affects the measurement of both spatial and ...
A. Plunkett, Á. Hacar, Lydia Moser-Fischer, D. Petry, P. Teuben, N. Pingel, D. Kunneriath, T. Takagi, Y. Miyamoto, E. Moravec, S. Suri, K. Hess, Melissa Hoffman, B. Mason   +13 more
semanticscholar   +1 more source

Astronomy Data, Virtual Observatory and Education [PDF]

Proceedings of the International Astronomical Union, 2019
We shall present with examples how analysis of astronomy data can be used for an educational purpose to train users in methods of data analysis, statistics, programming skills and research problems.
P. Hasan, S. N. Hasan
semanticscholar   +1 more source

The second data release from the European Pulsar Timing Array. I. The dataset and timing analysis [PDF]

Astronomy & Astrophysics, 2023
Pulsar timing arrays offer a probe of the low-frequency gravitational wave spectrum (1 - 100 nanohertz), which is intimately connected to a number of markers that can uniquely trace the formation and evolution of the Universe.
J. Antoniadis, S. Babak, A. B. Nielsen, C. Bassa, A. Berthereau, M. Bonetti, E. Bortolas, P. Brook, M. Burgay, R. N. Caballero, A. Chalumeau, D. Champion, S. Chanlaridis, S. Chen, I. Cognard, G. Desvignes, M. Falxa, R. Ferdman, A. Franchini, J. Gair, B. Goncharov, E. Graikou, J. Grießmeier, L. Guillemot, Y. J. Guo, H. Hu, F. Iraci, D. Izquierdo-Villalba, J. Jang, J. Jawor, G. Janssen, A. Jessner, R. Karuppusamy, E. Keane, M. Keith, M. Kramer, M. A. Krishnakumar, K. Lackeos, K. Lee, K. Liu, Y. Liu, A. Lyne, J. Mckee, R. Main, M. Mickaliger, I. C. Niţu, A. Parthasarathy, B. Perera, D. Perrodin, A. Petiteau, N. Porayko, A. Possenti, H. Q. L. A. Samajdar, S. Sanidas, A. Sesana, G. Shaifullah, L. Speri, R. Spiewak, B. Stappers, S. Susarla, G. Theureau, C. Tiburzi, E. V. D. Wateren, A. Vecchio, V. V. Krishnan, J. Verbiest, J. Wang, L. Wang, Z. Wu   +68 more
semanticscholar   +1 more source

Overview of Big Data Analytics in Modern Astronomy

International Journal of Mathematics, Statistics, and Computer Science, 2023
Astronomers are increasingly compelled to chart the universe with ever greater precision. Projects like the Sloan Digital Sky Survey (SDSS), Pan-STARRS, and the Large Synoptic Survey Telescope (LSST) generate approximately 100-200 Petabytes of data ...
Muhammad Faaique
semanticscholar   +1 more source

Exponential shapelets: basis functions for data analysis of isolated features [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We introduce one- and two-dimensional ‘exponential shapelets’: orthonormal basis functions that efficiently model isolated features in data. They are built from eigenfunctions of the quantum mechanical hydrogen atom, and inherit mathematics with ...
J. Berg'e, R. Massey, Quentin Baghi, P. Touboul   +3 more
semanticscholar   +1 more source

On the application of machine learning in astronomy and astrophysics: A text‐mining‐based scientometric analysis

WIREs Data Mining Knowl. Discov., 2022
Since the beginning of the 21st century, the fields of astronomy and astrophysics have experienced significant growth at observational and computational levels, leading to the acquisition of increasingly huge volumes of data.
J. Rodríguez, Ignacio Rodríguez-Rodríguez, Wai Lok Woo   +2 more
semanticscholar   +1 more source

Analysis of college students misconceptions in astronomy using four-tier test

Journal of Physics: Conference Series, 2022
This study aims to find out the misconceptions experienced by college students in Astronomy material using four-tier Diagnostic test through the google form.
S. N. Azizah, H. Akhsan, M. Muslim, M. Ariska   +3 more
semanticscholar   +1 more source

Joint analysis constraints on the physics of the first galaxies with low-frequency radio astronomy data [PDF]

, 2023
H. T. J. Bevins, Stefan Heimersheim, Irene Abril-Cabezas, Anastasia Fialkov, Eloy de Lera Acedo, Will Handley, Saurabh Singh, Rennan Barkana   +7 more
openalex   +3 more sources

Analysis of Zeeman effect data in radio astronomy

The Astrophysical Journal Supplement Series, 1990
The analysis of Zeeman effect data in radio astronomy is discussed; in particular, previous techniques are extended to include the case of low signal-to-noise ratios. Three statistical techniques for estimating the line-of-sight magnetic field are considered: maximum likelihood, least-squares, and Wiener filters.
R. J. Sault, N. E. B. Killeen, J. Zmuidzinas, R. Loushin   +3 more
openaire   +1 more source