2012MNRAS.420..447T

Query : 2012MNRAS.420..447T

2012MNRAS.420..447T - Mon. Not. R. Astron. Soc., 420, 447-454 (2012/February-2)

Cosmic flows in the nearby universe from type Ia supernovae.

TURNBULL S.J., HUDSON M.J., FELDMAN H.A., HICKEN M., KIRSHNER R.P. and WATKINS R.

Abstract (from CDS):

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 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 of the SNe bulk motion.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): supernovae: general - cosmological parameters - cosmology: observations - dark matter - large-scale structure of Universe

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME HOR-RET SUPERCL SCG 03 16 -48.0           ~ 70 3
2 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
3 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
4 NAME HYA-CEN SUPERCL SCG 13 14 -33.3           ~ 146 0
5 NAME Local Group GrG ~ ~           ~ 9325 0

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