Zobrazeno 1 - 10 of 471 pro vyhledávání: '"G. De Bruyn"'
1
Akademický článek
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2
Wide-field LOFAR-LBA power-spectra analyses
Autor: Maaijke Mevius, Michiel A. Brentjens, Sarod Yatawatta, B. K. Gehlot, V. N. Pandey, M. Hatef, Léon V. E. Koopmans, A. R. Offringa, A. G. de Bruyn, Saleem Zaroubi, Vibor Jelić, K. M. B. Asad
Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 478(2), 1484-1501. Oxford University Press
Contamination due to foregrounds (Galactic and Extra-galactic), calibration errors and ionospheric effects pose major challenges in detection of the cosmic 21 cm signal in various Epoch of Reionization (EoR) experiments. We present the results of a p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ff89f8c2273613455407e12432fa585
https://research.rug.nl/en/publications/617223ee-20bd-4f79-a206-63a99b4c29cb
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3
Polarization leakage in epoch of reionization windows - III. Wide-field effects of narrow-field arrays
Autor: K. M. B. Asad, Léon V. E. Koopmans, V. N. Pandey, A. G. de Bruyn, Vibor Jelić, B. K. Gehlot
Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 476(3), 3051-3062. Oxford University Press
Leakage of polarized Galactic diffuse emission into total intensity can potentially mimic the 21-cm signal coming from the epoch of reionization (EoR), as both of them might have fluctuating spectral structure. Although we are sensitive to the EoR si
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8877a9443d9ec198306f1e39f28b2a00
https://doi.org/10.1093/mnras/sty258
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4
Akademický článek
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5
Akademický článek
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6
Probing ionospheric structures using the LOFAR radio telescope
Autor: Ilian T. Iliev, R. J. van Weeren, Vibor Jelić, F. B. Abdalla, K. M. B. Asad, Michiel A. Brentjens, S. Kazemi, Saleem Zaroubi, A. H. Patil, J. Noordam, Emma Chapman, A. R. Offringa, Sarod Yatawatta, A. G. de Bruyn, Geraint Harker, Elizabeth R. Fernandez, Léon V. E. Koopmans, Harish Vedantham, Joel N. Bregman, B. Ciardi, S. van der Tol, Abhik Ghosh, S. Bus, V. N. Pandey, W. N. Brouw, M. Mevius, Stefan J. Wijnholds
Publikováno v: Radio Science. 51:927-941
LOFAR is the LOw-Frequency Radio interferometer ARray located at midlatitude (52°53′N). Here we present results on ionospheric structures derived from 29 LOFAR nighttime observations during the winters of 2012/2013 and 2013/2014. We show that LOFA
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4d3578212230c9993b38bfcee38255c9
https://doi.org/10.1002/2016rs006028
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7
Polarization leakage in epoch of reionization windows - I. Low Frequency Array observations of the 3C196 field
Autor: Vishambhar Pandey, Abhik Ghosh, Emma Chapman, S. van der Tol, Saleem Zaroubi, Hannes Jensen, Harish Vedantham, Rajat M. Thomas, Ilian T. Iliev, A. G. de Bruyn, Vibor Jelić, O. Martinez-Rubi, K. M. B. Asad, F. B. Abdalla, Luitje Koopmans, Sarod Yatawatta, S. Daiboo, Gianni Bernardi, Garrelt Mellema, A. R. Offringa, Geraint Harker, Maaijke Mevius, Michiel A. Brentjens, Elizabeth Fernandez, Joop Schaye, B. Ciardi, A. H. Patil, S. Bus
Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2015, 451 (4), pp.3709-3727. ⟨10.1093/mnras/stv1107⟩
Monthly Notices of the Royal Astronomical Society, 451(4), 3709-3727
Monthly Notices of the Royal Astronomical Society, 2015, 451 (4), pp.3709-3727. ⟨10.1093/mnras/stv1107⟩
Monthly Notices of the Royal Astronomical Society, 451(4), 3709-3727. Oxford University Press
Detection of the 21-cm signal coming from the epoch of reionization (EoR) is challenging especially because, even after removing the foregrounds, the residual Stokes I maps contain leakage from polarized emission that can mimic the signal. Here, we d
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c6afc381d43d0b4c64d2c22539286d5
https://hdl.handle.net/11370/61ed340c-b7b2-4193-a961-a76edb3fdeef
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8
Akademický článek
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9
Towards a theoretical clarification of biomimetics using conceptual tools from engineering design
Autor: G de Bruyn, James H. Nebelsick, Mirco Limpinsel, Manfred Drack, Oliver Betz
Publikováno v: Bioinspirationbiomimetics. 13(1)
Many successful examples of biomimetic products are available, and most research efforts in this emerging field are directed towards the development of specific applications. The theoretical and conceptual underpinnings of the knowledge transfer betw
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7748d89448434a9781bcbc61de7ab0d4
https://pubmed.ncbi.nlm.nih.gov/29235451
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10
Upper limits on the 21 cm epoch of reionization power spectrum from one night with LOFAR
Autor: Joop Schaye, Koki Kakiichi, A. H. Patil, Ilian T. Iliev, Sarod Yatawatta, F. B. Abdalla, K. M. B. Asad, A. G. de Bruyn, Vishambhar Pandey, Léon V. E. Koopmans, Saleem Zaroubi, Stefan J. Wijnholds, Geraint Harker, A. R. Offringa, B. K. Gehlot, M. B. Silva, W. N. Brouw, M. Hatef, Maaijke Mevius, Harish Vedantham, Emma Chapman, Suman Majumdar, Vibor Jelić, Garrelt Mellema, Damir Vrbanec, Abhik Ghosh, Michiel A. Brentjens, B. Ciardi
Publikováno v: NASA Astrophysics Data System
ASTROPHYSICAL JOURNAL (ISSN 0004-637X), 838(1), 65
The Astrophysical Journal, 838(1):65. IOP PUBLISHING LTD
The Astrophysical Journal
Astrophysical Journal
We present the first limits on the Epoch of Reionization (EoR) 21-cm HI power spectra, in the redshift range $z=7.9-10.6$, using the Low-Frequency Array (LOFAR) High-Band Antenna (HBA). In total 13\,h of data were used from observations centred on th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b1793ba3514da0b20db95dd8b8cadb0
http://hdl.handle.net/10044/1/46063
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