Open AccessPosted Content
MeerKLASS: MeerKAT Large Area Synoptic Survey
Mario G. Santos,Michelle E. Cluver,Matt Hilton,Matt J. Jarvis,Gyula I. G. Józsa,Lerothodi Leonard Leeuw,Oleg Smirnov,Russ Taylor,Filipe B. Abdalla,Jose Afonso,David Alonso,David Bacon,Bruce A. Bassett,Gianni Bernardi,Philip Bull,Stefano Camera,H. Cynthia Chiang,S. Colafrancesco,Pedro G. Ferreira,José Fonseca,Kurt van der Heyden,Ian Heywood,Kenda Knowles,Michelle Lochner,Yin-Zhe Ma,Roy Maartens,S. Makhathini,Kavilan Moodley,Alkistis Pourtsidou,Matthew Prescott,Jonathan Sievers,Kristine Spekkens,Mattia Vaccari,Amanda Weltman,I. H. Whittam,Amadeus Witzemann,Laura Wolz,Jonathan T. L. Zwart +37 more
TLDR
The MeerKLASS (MeerKAT Large Area Synoptic Survey) as mentioned in this paper is a large-scale survey of the sky that uses the Meer-KAT telescope.Abstract:
We discuss the ground-breaking science that will be possible with a wide area survey, using the MeerKAT telescope, known as MeerKLASS (MeerKAT Large Area Synoptic Survey). The current specifications of MeerKAT make it a great fit for science applications that require large survey speeds but not necessarily high angular resolutions. In particular, for cosmology, a large survey over $\sim 4,000 \, {\rm deg}^2$ for $\sim 4,000$ hours will potentially provide the first ever measurements of the baryon acoustic oscillations using the 21cm intensity mapping technique, with enough accuracy to impose constraints on the nature of dark energy. The combination with multi-wavelength data will give unique additional information, such as exquisite constraints on primordial non-Gaussianity using the multi-tracer technique, as well as a better handle on foregrounds and systematics. Such a wide survey with MeerKAT is also a great match for HI galaxy studies, providing unrivalled statistics in the pre-SKA era for galaxies resolved in the HI emission line beyond local structures at z > 0.01. It will also produce a large continuum galaxy sample down to a depth of about 5\,$\mu$Jy in L-band, which is quite unique over such large areas and will allow studies of the large-scale structure of the Universe out to high redshifts, complementing the galaxy HI survey to form a transformational multi-wavelength approach to study galaxy dynamics and evolution. Finally, the same survey will supply unique information for a range of other science applications, including a large statistical investigation of galaxy clusters as well as produce a rotation measure map across a huge swathe of the sky. The MeerKLASS survey will be a crucial step on the road to using SKA1-MID for cosmological applications and other commensal surveys, as described in the top priority SKA key science projects (abridged).read more
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A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier
TL;DR: The epoch of Cosmic Dawn, when the first stars and galaxies were born, is widely considered the final frontier of observational cosmology today as discussed by the authors, and it provides access to more than 90% of the baryonic (normal) matter in the Universe, and unlocks several thousand times more Fourier modes of information than available in today's cosmological surveys.
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Multipole expansion for HI intensity mapping experiments: unbiased parameter estimation
TL;DR: In this article, the authors assess the performance of the multipole expansion formalism in the case of single-dish HI intensity mapping, including instrumental and foreground removal effects, and find that foreground subtraction effects can lead to severe biases in the determination of cosmological parameters.
Journal ArticleDOI
1/f noise analysis for FAST H i intensity mapping drift-scan experiment
W. Hu,W. Hu,Yichao Li,Yougang Wang,Fengquan Wu,Bo Zhang,Ming Zhu,Shifan Zuo,Guilaine Lagache,Yin-Zhe Ma,Mario G. Santos,Xuelei Chen +11 more
TL;DR: In this paper, the authors investigated the 1/f noise of the FAST receiver system using drift-scan data from an intensity mapping pilot survey and estimated the 2D power spectrum densities.
Detecting Baryon Acoustic Oscillations with HI Intensity Mapping using MeerKAT
TL;DR: In this article, a set of full sky simulations were constructed to test how well MeerKAT can extract the Baryonic Acoustic Oscillations (BAO) along the line of sight.
Journal ArticleDOI
Galaxy number counts at second order: an independent approach
TL;DR: In this article, the relativistic galaxy number counts to second order in cosmological perturbation theory were derived for the angular diameter distance and for the volume spanned by a survey.
References
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