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pro vyhledávání: '"Trott, Cathryn M"'
The radio interferometric closure phases can be a valuable tool for studying cosmological {H\scriptsize{I}}~from the early Universe. Closure phases have the advantage of being immune to element-based gains and associated calibration errors. Thus, cal
Externí odkaz:
http://arxiv.org/abs/2409.02906
Autor:
Nunhokee, Chuneeta D., Null, Dev, Trott, Cathryn M., Jordan, Christopher H., Line, Jack B., Wayth, Randall, Barry, Nichole
Publikováno v:
Publ. Astron. Soc. Aust. 41 (2024) e095
Observations of the 21 cm signal face significant challenges due to bright astrophysical foregrounds that are several orders of magnitude higher than the brightness of the hydrogen line, along with various systematics. Successful 21 cm experiments re
Externí odkaz:
http://arxiv.org/abs/2409.03232
Autor:
Jaiswar, Ravi, Gupta, Anshu, da Cunha, Elisabete, Trott, Cathryn M., Harshan, Anishya, Battisti, Andrew, Forrest, Ben
The nature of the first galaxies that reionized the universe during the Epoch of Reionization (EoR) remains unclear. Attempts to directly determine spectral properties of these early galaxies are affected by both limited photometric constraints acros
Externí odkaz:
http://arxiv.org/abs/2405.04870
Autor:
Gupta, Anshu, Trott, Cathryn M., Jaiswar, Ravi, Ryan-Weber, E. V., Bunker, Andrew J., Acharyya, Ayan, Cameron, Alex J., Forrest, Ben, Kacprzak, Glenn G., Nanayakkara, Themiya, Tran, Kim-Vy, Chokshi, Aman
We present the discovery of a unique Lyman-continuum (LyC) emitter at z=3.088. The LyC emission were detected using the Hubble Space Telescope (HST) WFC3/UVIS F336W filter, covering a rest-frame wavelength range of 760-900 Angstrom. The peak signal-t
Externí odkaz:
http://arxiv.org/abs/2403.13285
Autor:
Trott, Cathryn M., Wayth, Randall B.
We present the first constraints on the cross-correlation power spectrum of HeII ($^{+}{\rm He}^3$) signal strength using the redshifted 8.67GHz hyperfine transition between $z=2.9$ and $z=4.1$ and with interferometric data obtained from the public a
Externí odkaz:
http://arxiv.org/abs/2309.05960
Radio interferometers can potentially detect the sky-averaged signal from the Cosmic Dawn (CD) and the Epoch of Reionisation (EoR) by studying the Moon as a thermal block to the foreground sky. The first step is to mitigate the Earth-based RFI reflec
Externí odkaz:
http://arxiv.org/abs/2306.01013
Understanding the temporal characteristics of data from low frequency radio telescopes is of importance in devising suitable calibration strategies. Application of time series analysis techniques to data from radio telescopes can reveal a wealth of i
Externí odkaz:
http://arxiv.org/abs/2302.07474
Fast cosmological transients such as fast radio bursts (FRBs) and gamma-ray bursts (GRBs) represent a class of sources more compact than any other cosmological object. As such they are sensitive to significant magnification via gravitational lensing
Externí odkaz:
http://arxiv.org/abs/2210.09487
Autor:
Trott, Cathryn M., Mondal, Rajesh, Mellema, Garrelt, Murray, Steven G., Greig, Bradley, Line, Jack L. B., Barry, Nichole, Morales, Miguel F.
Publikováno v:
A&A 666, A106 (2022)
The Multi-frequency Angular Power Spectrum (MAPS) is an alternative to spherically-averaged power spectra, and computes local fluctuations in the angular power spectrum without need for line-of-sight spectral transform. To test different approaches t
Externí odkaz:
http://arxiv.org/abs/2208.06082
Preparing for the first detection of the cosmic 21-cm signal from large-scale interferometer experiments requires rigorous testing of the data analysis and reduction pipelines. To validate that these pipelines do not erroneously remove or add feature
Externí odkaz:
http://arxiv.org/abs/2205.09960