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pro vyhledávání: '"Radio astrometry"'
Akademický článek
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Autor:
Hagiwara, Yoshiaki, Hada, Kazuhiro, Takamura, Mieko, Oyama, Tomoaki, Yamauchi, Aya, Suzuki, Syunsaku
Publikováno v:
Galaxies 2022, 10(6), 114
We report on recent technical developments in the front- and back-ends for the four 20 m radio telescopes of the Japanese Very-Long-Baseline Interferometry (VLBI) project, VLBI Exploration of Radio Astrometry (VERA). We present a brief overview of a
Externí odkaz:
http://arxiv.org/abs/2212.10144
Autor:
Leonid Petrov
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 76 (2024)
The very long baseline interferometry technique allows us to determine the positions of thousands of radio sources using the absolute astrometry approach. I have investigated the impacts of a selection of observing frequencies in a range from 2 to 43
Externí odkaz:
https://doaj.org/article/3c3cd5559d2040fa8f91536d3cb7c6b1
Autor:
Rioja, María, Dodson, Richard
We present a technique-led review of the progression of precise radio astrometry, from the first demonstrations, half a century ago, until to date and into the future. We cover the developments that have been fundamental to allow high accuracy and pr
Externí odkaz:
http://arxiv.org/abs/2010.02156
Autor:
Prabhu, Anirudh
Axions and axion-like particles (ALPs) are some of the best-motivated dark matter (DM) candidates. Under certain circumstances, large axion fluctuations in the early universe can collapse to form dense configurations called axion clumps. The densest
Externí odkaz:
http://arxiv.org/abs/2006.10231
Autor:
Imai, Hiroshi, Burns, Ross A., Yamada, Yoshiyuki, Goda, Naoteru, Yano, Tahei, Orosz, Gabor, Niinuma, Kotaro, Bekki, Kenji
This chapter summarizes radio astrometry in relation to current very long baseline interferometry (VLBI) projects and describes its perspectives with the SKA. The scientific goals of the astrometry with the SKA have been discussed in the internationa
Externí odkaz:
http://arxiv.org/abs/1603.02042
Autor:
Bassa, C. G., Beswick, R., Tingay, S. J., Keane, E. F., Bhandari, S., Johnston, S., Totani, T., Tominaga, N., Yasuda, N., Stappers, B. W., Barr, E. D., Kramer, M., Possenti, A.
A fading radio source, coincident in time and position with the fast radio burst FRB150418, has been associated with the galaxy WISE J071634.59-190039.2. Subsequent observations of this galaxy have revealed that it contains a persistent, but variable
Externí odkaz:
http://arxiv.org/abs/1607.08257
The close active binary HR 5110 was observed at six epochs over 26 days using a global VLBI array at 15.4~GHz. We used phase-referencing to determine the position of the radio centroid at each epoch with an uncertainty significantly smaller than the
Externí odkaz:
http://arxiv.org/abs/1508.06654
Autor:
Reid, M. J., Honma, M.
Astrometry provides the foundation for astrophysics. Accurate positions are required for the association of sources detected at different times or wavelengths, and distances are essential to estimate the size, luminosity, mass, and ages of most objec
Externí odkaz:
http://arxiv.org/abs/1312.2871
Autor:
Yoshiaki Hagiwara, Kazuhiro Hada, Mieko Takamura, Tomoaki Oyama, Aya Yamauchi, Syunsaku Suzuki
Publikováno v:
Galaxies, Vol 10, Iss 6, p 114 (2022)
We report on recent technical developments in the front- and back-ends for the four 20 m radio telescopes of the Japanese Very-Long-Baseline Interferometry (VLBI) project, VLBI Exploration of Radio Astrometry (VERA). We present a brief overview of a
Externí odkaz:
https://doaj.org/article/b2a734da411b4fee8f4cc49b02fc4372