An Independent Measure of the Kinematic Dipole from SDSS

Abstract

We utilize the Sloan Digital Sky Survey (SDSS) extended Baryon Oscillation Spectroscopic Survey (eBOSS) and Baryon Oscillation Spectroscopic Survey (BOSS) catalogs with precise spectroscopic redshifts to estimate the kinematic redshift dipole caused by the proper motion of the Solar system. We find that the velocity extracted from the kinematic dipole is consistent with Cosmic Microwave Background inferred values. Although the small sky coverage and limited number density of the SDSS sources constrain us from obtaining precise and robust measurements, we leverage the redshift dipole method to estimate the kinematic dipole. The velocity measurements in this study are insensitive to intrinsic clustering, associated with the source count dipole. The kinematic dipole measured in this work and its consistency with CMB values do not guarantee isotropy at large scales. The anisotropy (excess dipole) measured with the NRAO VLA Sky Survey (NVSS) and the WISE Catalog (CatWISE) could be due to the intrinsic distribution of galaxies. The results in this work focus solely on the kinematic dipole term.

arXiv commentFootnotes 5, 6, and 7 were added post-acceptance to the journal version for clarification, in response to comments and questions from peers and colleagues

References in corpus (65)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Challenges for $\Lambda$CDM: An update
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
• The linear power spectrum of observed source number counts
• Planck 2018 results. VII. Isotropy and Statistics of the CMB
• Is the low-l microwave background cosmic?
• 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
• Dipole Anisotropy in the COBE DMR First-Year Sky Maps
• Planck 2018 results. III. High Frequency Instrument data processing and frequency maps
• CMB Anomalies after Planck
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the BOSS Final Data Release
• Core Cosmology Library: Precision Cosmological Predictions for LSST
• A Test of the Cosmological Principle with Quasars
• Is the Observable Universe Consistent with the Cosmological Principle?
• Fluctuations of the luminosity distance
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Modeling the clustering and halo occupation distribution of BOSS-CMASS galaxies in the Final Data Release
• A new measurement of the bulk flow of X-ray luminous clusters of galaxies
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogs for Cosmological Analysis
• Detection of the velocity dipole in the radio galaxies of the NRAO VLA Sky Survey
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations at redshift of 0.72 with the DR14 Luminous Red Galaxy Sample
• Large peculiar motion of the solar system from the dipole anisotropy in sky brightness due to distant radio sources
• A Challenge to the Standard Cosmological Model
• Dipoles in the Sky
• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: 1000 multi-tracer mock catalogues with redshift evolution and systematics for galaxies and quasars of the final data release
• Revisiting the NVSS number count dipole
• Analyzing the Large-Scale Bulk Flow using CosmicFlows4: Increasing Tension with the Standard Cosmological Model
• The Cosmic Radio Dipole: Estimators and Frequency Dependence
• Planck 2018 results. II. Low Frequency Instrument data processing
• Constraints on anisotropic cosmic expansion from supernovae
• Anisotropy in the Distribution of Galactic Radio Polarizations
• Dipole anisotropy in sky brightness and source count distribution in radio NVSS data
• Anomalies in Physical Cosmology
• Search for Anisotropy of Ultra-High Energy Cosmic Rays with the Telescope Array Experiment
• Testing the Cosmological Principle with CatWISE Quasars: A Bayesian Analysis of the Number-Count Dipole
• Dipole Anisotropy in Integrated Linearly Polarized Flux Density in NVSS Data
• A new way to test the Cosmological Principle: measuring our peculiar velocity and the large scale anisotropy independently
• Inference of the cosmic rest-frame from supernovae Ia
• The cosmic radio dipole: Bayesian estimators on new and old radio surveys
• The kinematic dipole in galaxy redshift surveys
• An intrinsic anisotropy in the angular distribution of gamma-ray bursts
• Large angular scale multipoles at redshift ~0.8
• Testing the standard model of cosmology with the SKA: the cosmic radio dipole
• Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II
• Theoretical systematics in testing the Cosmological Principle with the kinematic quasar dipole
• Is there evidence for anomalous dipole anisotropy in the large-scale structure?
• Search for Large-scale Anisotropy on Arrival Directions of Ultra-high-energy Cosmic Rays Observed with the Telescope Array Experiment
• Testing the anisotropy in the angular distribution of $Fermi$/GBM gamma-ray bursts
• Peculiar motion of the solar system derived from a dipole anisotropy in the redshift distribution of distant quasars
• Polarization Alignment in JVAS/CLASS flat spectrum radio surveys
• Cosmic Anisotropy and Fast Radio Bursts
• Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at $10^{19}$ eV
• Evidence of isotropy at large-scale from polarizations of radio sources
• Anisotropy in the angular distribution of the long gamma-ray bursts?
• Extracting Spectral Index of Intergalactic Magnetic Field from Radio Polarizations
• The galaxy power spectrum from TGSS ADR1 and the effect of flux calibration systematics
• A study of Dipolar Signal in distant Quasars with various observables
• Resolution of the incongruency of dipole asymmetries within various large radio surveys -- implications for the Cosmological Principle
• Footprints of Doppler and Aberration Effects in CMB Experiments: Statistical and Cosmological Implications
• Testing the Cosmological Principle: On the Time Dilation of Distant Sources
• A mechanism to explain Galaxy alignment over a range of scales

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