Monopole Fluctuations in Galaxy Surveys
arXiv:2410.00951 · doi:10.3847/2041-8213/ada911
Abstract
Galaxy clustering provides a powerful way to probe cosmology. This requires understanding of the background mean density of galaxy samples, which is estimated from the survey itself by averaging the observed galaxy number density over the angular position. The angle average includes not only the background mean density, but also the monopole fluctuation at each redshift. Here for the first time we compute the monopole fluctuations in galaxy surveys and investigate their impact on galaxy clustering. The monopole fluctuations vary as a function of redshift, and it is correlated with other fluctuations, affecting the two-point correlation function measurements. In an idealized all-sky survey, the rms fluctuation at can be as large as 7% of the two-point correlation function in amplitude at the BAO scale, and it becomes smaller than 1% at . The monopole fluctuations are unavoidable, but they can be modeled. We discuss its relation to the integral constraint and the implications for the galaxy clustering analysis.
7 pages, 2 figures, accepted for publication in ApJ Letters
References in corpus (46)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- The Sloan Digital Sky Survey: Technical Summary
- Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
- The 2dF Galaxy Redshift Survey: Spectra and redshifts
- Baryonic Features in the Matter Transfer Function
- SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
- Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
- Observational Probes of Cosmic Acceleration
- The Temperature of the Cosmic Microwave Background
- Spectroscopic Target Selection for the Sloan Digital Sky Survey: The Luminous Red Galaxy Sample
- The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
- The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
- What galaxy surveys really measure
- On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
- The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measurements of the growth of structure and expansion rate at z=0.57 from anisotropic clustering
- The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
- Interpreting large-scale redshift-space distortion measurements
- The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space
- New Perspective on Galaxy Clustering as a Cosmological Probe: General Relativistic Effects
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
- Large-scale clustering of galaxies in general relativity
- The clustering of massive galaxies at z~0.5 from the first semester of BOSS data
- General Relativistic Description of the Observed Galaxy Power Spectrum: Do We Understand What We Measure?
- Cosmological baryonic and matter densities from 600,000 SDSS Luminous Red Galaxies with photometric redshifts
- `Eppur Si Muove': On The Motion of the Acoustic Peak in the Correlation Function
- Non-linear structure formation and the acoustic scale
- The Shift of the Baryon Acoustic Oscillation Scale: A Simple Physical Picture
- High-precision predictions for the acoustic scale in the non-linear regime
- Asymmetric galaxy correlation functions
- Gravitational redshift and other redshift-space distortions of the imaginary part of the power spectrum
- Luminosity Function Constraints on the Evolution of Massive Red Galaxies Since z~0.9
- Integral constraints in spectroscopic surveys
- Gauging the cosmic microwave background
- Baryon Acoustic Oscillation Theory and Modelling Systematics for the DESI 2024 results
- Gauge-Invariance and Infrared Divergences in the Luminosity Distance
- Galaxy Power Spectrum in General Relativity
- Galaxy Two-Point Correlation Function in General Relativity
- : A New Cosmological Parameter?
- General and consistent statistics for cosmological observations
- Correlation function of the luminosity distances
- Cosmological Information Contents on the Light-Cone
- Monopole Fluctuation of the CMB and its Gauge Invariance
- Gravitational Lensing Effects on the Baryonic Acoustic Oscillation Signature in the Redshift-Space Correlation Function
- Infrared (in)sensitivity of relativistic effects in cosmological observable statistics
- Conditions for the Absence of Infrared Sensitivity in Cosmological Probes in Any Gravity Theories