Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field

By M. Hudson, J. Carrick, Stephen J. Turnbull, G. Lavaux. Proceedings of the International Astronomical Union, 2014

173 citations recorded by the source corpus.

Abstract Using redshifts from the 2M++ redshift compilation, we reconstruct the density of galaxies within 200 h −1 Mpc, and compare the predicted peculiar velocities Tully-Fisher and SNe peculiar velocities. The comparison yields a best-fit value of β ≡ Ωm 0.55/b* = 0.431 ± 0.021, suggesting Ωm 0.55σ8,lin = 0.401 ± 0.024, in good agreement with other probes. The predicted peculiar velocity of the Local Group from sources within the 2M++ volume is 540 ± 40 km s−1, towards l = 268° ± 4°, b = 38° ± 6°, which is misaligned by only 10° with the Cosmic Microwave Background dipole. To account for sources outside the 2M++ volume, we fit simultaneously for β* and an external bulk flow in our analysis. The external bulk flow has a velocity of 159 ± 23 km s−1 towards l = 304° ± 11°, b6° ± 13°.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/68c9d4ceb2bbe139d52f4d8cb2bd701a248cbb86

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Citations in the corpus

• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters (2018, unknown): “Peculiar-velocity corrections are computed from Carrick et al. (2015).”
• A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT (2016, methodology): “We currently account for flows induced by visible structures using host redshift corrections derived from a map of the matter density field calibrated by the 2M++ catalog (with a light-to-matter bias parameter of β=0.43 and a dipole from Carrick et al. (2015)).”
• The Pantheon+ Analysis: Cosmological Constraints (2022, methodology): “The baseline corrections are based on 2M++ (Carrick et al. 2015) with gl obal parameters found in Said et al. (2020) and combined with group velocities estimated from Tully (2015) group assignments.”
• GLADE: A galaxy catalogue for multimessenger searches in the advanced gravitational-wave detector era (2018, methodology): “We used the peculiar velocity field published in Carrick et al. (2015) for this correction, where peculiar velocities are defined at vertices of a uniform grid with 1.56 Mpc/h linear resolution, within a distance limit of ± 200 Mpc/h .”
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s−1 Mpc−1 Uncertainty from the Hubble Space Telescope and the SH0ES Team (2021, methodology): “The latter are provided by constrained realizations of the peculiar-velocity field by Carrick et al. (2015), Said et al. (2020), and Lilow & Nusser (2021) based on 2M++ (Lavaux & Hudson 2011) and 2MRS (Huchra et al. 2012; Macri et al. 2019), respectively.”
• Probing cosmic isotropy with a new X-ray galaxy cluster sample through the LX–T scaling relation (2020, background): “An example of studying the scale of bulk flows is given in Carrick et al. (2015) who find a 5σ bulk flow of ∼160 km s−1 extending over 200 h−1 Mpc toward (l, b) ∼ (304◦,+6◦).”
• Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles (2017, methodology): “Following the analysis of Riess et al. (2016), we also tabulate redshifts corrected for coherent flows derived from a model based on visible large scale structure (Carrick et al. 2015).”
• Evidence for anisotropy of cosmic acceleration (2018, methodology): “While the flow model (Carrick et al. 2015) from which the redshifts of the Pantheon sample have been corrected go out to z ∼ 0.067, this model has a residual bulk flow of 159±23 km s−1 attributed to sources beyond z = 0.067, and 890 of the 1048 Pantheon SNe are in the hemisphere opposite to the…”
• The Hubble Constant from Infrared Surface Brightness Fluctuation Distances (2021, methodology): “The second flow model is that of Carrick et al. (2015), based on the density field reconstructed from the 2M++ redshift compilation (Lavaux & Hudson 2011), which combines the 2MRS with deeper redshift surveys over large fractions of the sky.”
• The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample (2017, methodology): “This is higher than the estimate from Carrick et al. (2015), but we use it for our analysis.”
• The Local Perspective on the Hubble Tension: Local Structure Does Not Impact Measurement of the Hubble Constant (2019, methodology): “As we are now looking for anisotropic effects (possibly including those in 2MASS++), we remove the Carrick et al. (2015) flow corrections to redshift from our data to leave any possible features in place.”
• Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters (2017, unknown): “Carrick et al. (2015) measure βI = 0.43± 0.021.”
• The Megamaser Cosmology Project. XIII. Combined Hubble Constant Constraints (2020, methodology): “We assume a 150 km s−1 uncertainty for all recession velocities, as per Carrick et al. (2015) for 2M++ and Graziani et al. (2019) for CF3.”