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
Citations
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Journal ArticleDOI
Measuring the ISW effect with next-generation radio surveys
TL;DR: In this article, the authors show that 21cm intensity mapping and radio continuum surveys with the SKA in Phase~1 promise a ∼5σ detection if they use tomography, with a similar forecast for the precursor EMU survey.
Journal ArticleDOI
Cross-correlating 21 cm and galaxy surveys: implications for cosmology and astrophysics
TL;DR: In this paper, the authors forecast astrophysical and cosmological parameter constraints from synergies between 21 cm intensity mapping and wide field optical galaxy surveys (both spectroscopic and photometric) over $z \sim 0-3 ).
Posted Content
HI constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps
Laura Wolz,Alkistis Pourtsidou,Kiyoshi Masui,Tzu-Ching Chang,Julian E. Bautista,Eva-Maria Müller,Santiago Avila,David Bacon,Will J. Percival,Steven Cunnington,C. J. Anderson,Xuelei Chen,Jean-Paul Kneib,Yi-Chao Li,Yu-Wei Liao,Ue-Li Pen,Jeffrey B. Peterson,Graziano Rossi,Donald P. Schneider,Jaswant K. Yadav,Gong-Bo Zhao +20 more
TL;DR: In this article, the authors present a joint analysis of neutral hydrogen (HI) Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples from the eBOSS survey, and the WiggleZ Dark Energy Survey sample The HI intensity maps are Green Bank Telescope observations of the redshifted 21cm emission on 100deg2 covering the redshift range.
Journal ArticleDOI
Probing primordial non-Gaussianity with the power spectrum and bispectrum of future 21 cm intensity maps
TL;DR: In this paper, the authors investigate the constraints attainable from single-dish surveys operating in single-spectral mode, using the combined power spectrum and bispectrum signal, and find that single-dimensional surveys typically outperform interferometer surveys.
Journal ArticleDOI
Multipole expansion for H I intensity mapping experiments: simulations and modelling
Steven Cunnington,Steven Cunnington,Alkistis Pourtsidou,Alkistis Pourtsidou,Paula S. Soares,Chris Blake,David Bacon +6 more
TL;DR: In this article, a framework and an open-source python toolkit are presented to analyse the 2-point statistics of 3D fluctuations in the context of HI intensity maps using the multipole expansion formalism.
References
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