Cosmic flows in the nearby universe from Type Ia supernovae

By Stephen J. Turnbull, M. Hudson, H. Feldman, M. Hicken, R. Kirshner, R. Watkins. 2011

232 citations recorded by the source corpus.

Peculiar velocities are one of the only probes of very large scale mass density fluctuations in the nearby Universe. We present new ‘minimal variance’ bulk flow measurements based upon the ‘First Amendment’ compilation of 245 Type Ia supernovae (SNe) peculiar velocities and find a bulk flow of 249 ± 76 km s−1 in the direction l= 319°± 18°, b= 7°± 14°. The SNe bulk flow is consistent with the expectations of Λ cold dark matter (ΛCDM). However, it is also marginally consistent with the bulk flow of a larger compilation of non-SNe peculiar velocities. By comparing the SNe peculiar velocities to predictions of the IRAS Point Source Catalogue Redshift Survey (PSCz) galaxy density field, we find Ω0.55mσ8,lin= 0.40 ± 0.07, which is in agreement with ΛCDM. However, we also show that the PSCz density field fails to account for 150 ± 43 km s−1 of the SNe bulk motion.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/7110e8e40cade903b6f70c6901b4d77272a28654

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Citations in the corpus

COSMICFLOWS-2: THE DATA (2013, background): “Even with relatively small samples there have already been interesting studies of large scale flow fields (Colin et al. 2011; Dai et al. 2011; Turnbull et al. 2012).”
First Evidence of Running Cosmic Vacuum: Challenging the Concordance Model (2016, background): “…the existence of other LSS data points in the literature concerning some of the used redshift values in our Table 4 – cf. e.g. Percival et al. (2004); Turnbull et al. (2012); Hudson & Turnbull (2013); Johnson et al. (2014) – we have explicitly checked that their inclusion or not in our numerical…”
Evolution of the f σ 8 tension with the Planck 15 / Λ CDM determination and implications for modified gravity theories (2018, unknown): “065 [79], [78] 20 October 2011 (Ω0m,ΩK , σ8) = (0.”
Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles (2017, methodology): “Our choice is plausible (Radburn-Smith et al. 2004; Turnbull et al. 2012; Feindt et al. 2013) and previous studies have also used this value for the peculiar velocity uncertainty (Mandel et al. 2009, 2011; Barone-Nugent et al. 2012).”
CfA4: LIGHT CURVES FOR 94 TYPE Ia SUPERNOVAE (2012, methodology): “A constraint on σ8, the amplitude of cosmic fluctuations, based in large part on the CfA3 sample, has recently been derived by Turnbull et al. (2012), who used the velocity residuals in the nearby Hubble flow to determine the variance in the dark matter density on a spatial scale of 8 Mpc, Ω0.”
TWO MICRON ALL SKY SURVEY PHOTOMETRIC REDSHIFT CATALOG: A COMPREHENSIVE THREE-DIMENSIONAL CENSUS OF THE WHOLE SKY (2013, background): “Such a measurement traditionally requires catalogs of peculiar velocities (see e.g. Nusser & Davis 2011; Turnbull et al. 2012, for recent contributions), which are both limited to the very local Universe (z < 0.02) and compromised by large uncertainties in distance indicators used.”
Testing ΛCDM at the lowest redshifts with SN Ia and galaxy velocities (2016, methodology): “We also show past measurements of the same quantity from 6dFGS at z ' 0 and SNe (black leftmost data point [24]), SNe alone (purple data point [26]), 6dFGS alone at z = 0.”
The clustering of galaxies in the SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: testing deviations from Λ and general relativity using anisotropic clustering of galaxies (2012, methodology): “Hudson & Turnbull (2012) were able to get a slightly stronger measurement ofγ by combining RSD data with a low redshift peculiar velocity data from Turnbull et al. (2012) and Davis et al. (2011).”
Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field (2014, methodology): “Using this method of velocity-velocity comparison, a number of recent studies have constrained this parameter combination (Pike & Hudson 2005; Davis et al. 2011; Branchini et al. 2012; Turnbull et al. 2012).”