Fluctuations of differential number counts of radio continuum sources
arXiv:1407.4682 · doi:10.1103/PhysRevD.91.043507
Abstract
We investigate the differential number counts of sources in radio continuum surveys, including all terms at linear order in cosmological perturbations. Our framework does not assume a specific gauge condition. This general approach allows us to recover gauge invariance explicitly. With the complete derivations of the covariant volume integral on the past light cone, we have identified several contributions in the number counts. To clarify their underlying physics, we present each contributions in terms of scalar, vector and tensor modes. This theoretical framework promises to be widely applicable to continuum radio galaxy surveys to model the expected angular power spectrum and two-point correlation.
arXiv comment9 pages 3 figures
References in corpus (15)
- The linear power spectrum of observed source number counts
- What galaxy surveys really measure
- New Perspective on Galaxy Clustering as a Cosmological Probe: General Relativistic Effects
- Radio and Millimeter Continuum Surveys and their Astrophysical Implications
- General Relativistic Description of the Observed Galaxy Power Spectrum: Do We Understand What We Measure?
- Correlated Fluctuations in Luminosity Distance and the (Surprising) Importance of Peculiar Motion in Supernova Surveys
- Fluctuations of the luminosity distance
- Measurement of the angular correlation function of radio galaxies from the NRAO VLA Sky Survey
- Effect of Peculiar Motion in Weak Lensing
- The angular power spectrum of NVSS radio galaxies
- Null Geodesics in Perturbed Spacetimes
- Cosmology with Doppler Lensing
- Large-scale 3D galaxy correlation function and non-Gaussianity
- Complete Treatment of Galaxy Two-Point Statistics: Gravitational Lensing Effects and Redshift-Space Distortions
- Relativistic corrections and non-Gaussianity in radio continuum surveys
Cited by in corpus (12)
- Ultra large-scale cosmology in next-generation experiments with single tracers
- Large angular scale multipoles at redshift ~0.8
- The expected kinematic matter dipole is robust against source evolution
- Vector perturbations of galaxy number counts
- Generalisation of the Kaiser Rocket effect in general relativity in the wide-angle galaxy 2-point correlation function
- The galaxy power spectrum from TGSS ADR1 and the effect of flux calibration systematics
- Galaxy power spectrum and biasing results from the LOFAR Two-metre Sky Survey (first data release)
- Galaxy number counts at second order: an independent approach
- Relativistic and non-Gaussianity contributions to the one-loop power spectrum
- GaLactic and Extragalactic All-sky Murchison Widefield Array survey eXtended (GLEAM-X) I: Survey Description and Initial Data Release
- Multifield curved solid: Early dark energy and perturbation instabilities
- Applications of Cosmological Perturbation Theory in the Late Universe