Results 31 to 40 of about 7,785,767 (337)

Identification of Gamma-Ray Point Sources in Fermi-LAT Data with Minimum Spanning Tree Algorithm [PDF]

Iranian Journal of Astronomy and Astrophysics, 2023
Gamma rays are the most energetic photons in the electromagnetic spectrum, detected with ground-based and space-based detectors in different energy ranges from sources in our galaxy and beyond.
Mehran Soor, Fatemeh Akhondi, Hadi Hedayati   +2 more
doaj   +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

An Application of Hilbert-Huang Transform on the Non-Stationary Astronomical Time Series: The Superorbital Modulation of SMC X-1 [PDF]

Journal of Astronomy and Space Sciences, 2013
We present the Hilbert-Huang transform (HHT) analysis on the quasi-periodic modulation of SMC X-1. SMC X-1, consisting of a neutron star and a massive companion, exhibits superorbital modulation with a period varying between ~40 d and ~65 d. We applied
Chin-Ping Hu, Yi Chou, Ming-Chya Wu, Ting-Chang Yang, Yi-Hao Su   +4 more
doaj   +1 more source

Pulsar-candidate Selection Using a Generative Adversarial Network and ResNeXt

The Astrophysical Journal Supplement Series, 2022
Pulsar research has been a hot topic in the area of astronomy since they were first discovered. Pulsar discovery is fundamental for pulsar research. While pulsars are now visible across the electromagnetic spectrum, pulsar searches with modern radio ...
Qian Yin, Yefan Li, Jiajie Li, Xin Zheng, Ping Guo   +4 more
doaj   +1 more source

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

Models and data analysis tools for the Solar Orbiter mission

Astronomy & Astrophysics, 2019
Context.The Solar Orbiter spacecraft will be equipped with a wide range of remote-sensing (RS) and in situ (IS) instruments to record novel and unprecedented measurements of the solar atmosphere and the inner heliosphere.
A. Rouillard, R. Pinto, A. Vourlidas, A. Groof, W. Thompson, A. Bemporad, S. Dolei, M. Indurain, É. Buchlin, C. Sasso, D. Spadaro, K. Dalmasse, J. Hirzberger, I. Zouganelis, A. Strugarek, A. Brun, M. Alexandre, D. Berghmans, N. E. Raouafi, T. Wiegelmann, P. Pagano, C. Arge, T. Nieves-chinchilla, M. Lavarra, N. Poirier, T. Amari, À. Aran, V. Andretta, E. Antonucci, A. Anastasiadis, F. Auchère, L. B. Rubio, B. Nicula, X. Bonnin, M. Bouchemit, E. Budnik, S. Caminade, B. Cecconi, J. Carlyle, I. Cernuda, J. Davila, L. Etesi, F. Lara, A. Fedorov, S. Fineschi, A. Fludra, V. Génot, M. Georgoulis, H. Gilbert, A. Giunta, R. Gómez-Herrero, S. Guest, M. Haberreiter, D. Hassler, C. Henney, R. Howard, T. Horbury, M. Janvier, S. Jones, K. Kozarev, E. Kraaikamp, A. Kouloumvakos, S. Krucker, A. Lagg, J. Linker, B. Lavraud, P. Louarn, M. Maksimović, S. Maloney, G. Mann, A. Masson, D. Müller, H. Önel, P. Osuna, D. Súarez, C. Owen, A. Papaioannou, D. Pérez-Suárez, J. Rodríguez-Pacheco, S. Parenti, E. Pariat, H. Peter, S. Plunkett, J. Pomoell, J. Raines, T. Riethmüller, N. Rich, L. Rodriguez, M. Romoli, L. Sanchez, S. Solanki, O. C. Cyr, T. Straus, R. Susino, L. Teriaca, J. C. D. T. Iniesta, R. Ventura, C. Verbeeck, N. Vilmer, A. Warmuth, A. Walsh, C. Watson, D. Williams, Y. Wu, A. Zhukov   +104 more
semanticscholar   +1 more source

Selected topics on data analysis in astronomy : general lectures given at the II Workshop on Data Analysis in Astronomy, Erice, Italy, April 20-30, 1986 [PDF]

, 2022
vii, 170 p. : ill.
Crane, P, Di Ges u, V, International Workshop on Data Analysis in Astronomy (2nd : 1986 : Erice, Italy), Scarsi, L   +3 more
core   +2 more sources

Radio physics and radio astronomy [PDF]

, 2021
International audiencePurpose: Review of investigations of cosmic sources radioemission scintillations due to interplanetary plasma irregularities made at the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, from the first ...
Brazhenko, A, I, Ivantyshyn Karpenko, O, L, Lytvynenko, O, O, Zarka, P, Lesia, A, Lecacheux, Institute, Physiko-Mechanical, Kuhai, N, V, Kalinichenko, M, M, Romanchuk, O, I, Frantsuzenko, A, V, Bubnov, I, M, Yerin, S, M, Rucker, H, O, Konovalenko, O, O   +13 more
core   +1 more source

Toward Machine-learning-based Metastudies: Applications to Cosmological Parameters

The Astrophysical Journal Supplement Series, 2023
We develop a new model for automatic extraction of reported measurement values from the astrophysical literature, utilizing modern natural language processing techniques.
Tom Crossland, Pontus Stenetorp, Daisuke Kawata, Sebastian Riedel, Thomas D. Kitching, Anurag Deshpande, Tom Kimpson, Choong Ling Liew-Cain, Christian Pedersen, Davide Piras, Monu Sharma   +10 more
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source