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Related papers: Peculiar Velocities from Type Ia Supernovae

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We compare the peculiar velocities of nearby SNe Ia with those predicted by the gravity fields of full sky galaxy catalogs. The method provides a powerful test of the gravitational instability paradigm and strong constraints on the density…

Astrophysics · Physics 2009-10-30 Adam G. Riess , Marc Davis , Jonathan Baker , Robert P. Kirshner

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…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Stephen J. Turnbull , Michael J. Hudson , Hume A. Feldman , Malcolm Hicken , Robert P. Kirshner , Richard Watkins

The peculiar motions of galaxies are powerful cosmological probes that trace the growth of structures and the distribution of matter in the universe, providing a means to investigate the nature of dark energy and test gravity on…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-09 Ujjwal Upadhyay , Tarun Deep Saini , Shiv K. Sethi

We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma_8=0.79 +/- 0.22 from SNe, and examine the potential of this method to constrain…

Astrophysics · Physics 2009-11-16 Christopher Gordon , Kate Land , Anze Slosar

We compare the measured peculiar velocities of 98 local (<150/h Mpc) type Ia supernovae with predictions derived from the PSCz survey. There is excellent agreement between the two datasets with a best fit beta_I (=Omega_m^0.6/b_I) of…

Astrophysics · Physics 2009-11-10 D. J. Radburn-Smith , J. R. Lucey , M. J. Hudson

We present the Democratic Samples of Supernovae (DSS), a compilation of 775 low-redshift Type Ia and II supernovae (SNe Ia & II), of which 137 SN Ia distances are derived via the newly developed snapshot distance method. Using the objects…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-26 Benjamin E. Stahl , Thomas de Jaeger , Supranta S. Boruah , WeiKang Zheng , Alexei V. Filippenko , Michael J. Hudson

We quantify the effect of supernova Type Ia peculiar velocities on the derivation of cosmological parameters. The published distant and local Ia SNe used for the Supernova Legacy Survey first-year cosmology report form the sample for this…

Astrophysics · Physics 2010-12-20 James D. Neill , Michael J. Hudson , Alex Conley

We investigate measuring the peculiar motions of galaxies up to $z=0.5$ using Type Ia supernovae (SNe Ia) from LSST, and predict the subsequent constraints on the growth rate of structure. We consider two cases. Our first is based on…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-11 Cullan Howlett , Aaron S. G. Robotham , Claudia D. P. Lagos , Alex G. Kim

Type Ia Supernovae (SNe Ia) are widely used to measure the expansion of the Universe. To perform such measurements the luminosity and cosmological redshift ($z$) of the SNe Ia have to be determined. The uncertainty on $z$ includes an…

In the upcoming decade cadenced wide-field imaging surveys will increase the number of identified $z<0.3$ Type~Ia supernovae (SNe~Ia) from the hundreds to the hundreds of thousands. The increase in the number density and solid-angle…

The application of large scale peculiar velocity (LSPV), as a crucial probe of dark matter, dark energy and gravity, is severely limited by measurement obstacles. We show that fluctuations in type Ia supernovae (SNe Ia) fluxes induced by…

Astrophysics · Physics 2008-11-26 Pengjie Zhang , Xuelei Chen

We estimate the solar system motion relative to the cosmic microwave background using type Ia supernovae (SNe) measurements. We take into account the correlations in the error bars of the SNe measurements arising from correlated peculiar…

Astrophysics · Physics 2009-11-13 Christopher Gordon , Kate Land , Anze Slosar

We have measured our Galaxy's motion relative to distant galaxies in which type Ia supernovae (SN Ia) have been observed. The effective recession velocity of this sample is 7000 km s$^{-1}$, which approaches the depth of the survey of…

Astrophysics · Physics 2009-10-22 Adam G. Riess , William H. Press , Robert P. Kirshner

Context. Our Local Group of galaxies appears to be moving relative to the cosmic microwave background with the source of the peculiar motion still uncertain. While in the past this has been studied mostly using galaxies as distance…

Studies of the peculiar velocity bulk flow based on different tools and datasets have been consistent so far in their estimation of the direction of the flow, which also happens to lie in close proximity to several features identified in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Ben Rathaus , Ely D. Kovetz , Nissan Itzhaki

Constraints on dark energy from current observational data are sensitive to how distances are measured from Type Ia supernova (SN Ia) data. We find that flux-averaging of SNe Ia can be used to test the presence of unknown systematic…

Cosmology and Nongalactic Astrophysics · Physics 2013-05-29 Yun Wang

The remarkable uniformity of Type Ia supernovae (SNe Ia) has allowed astronomers to use them as distance indicators to measure the properties and expansion history of the Universe. However, SNe Ia exhibit intrinsic variation in both their…

Astrophysics · Physics 2009-09-29 William Michael Wood-Vasey

We compare the measured peculiar velocities of 98 local (<150/h Mpc) type Ia supernovae (SNIa) with predictions derived from the PSCz. There is excellent agreement between the two datasets with a best fit beta_I (=Omega_m^0.6/b_I) of…

Astrophysics · Physics 2007-05-23 John Lucey , David Radburn-Smith , Mike Hudson

The focus of this review is the work that has been done during the 1990s on using Type Ia supernovae (SNe Ia) to measure the Hubble constant ($H_0$). SNe Ia are well suited for measuring $H_0$. A straightforward maximum-light color…

Astrophysics · Physics 2009-10-30 D. Branch

Separating the components of redshift due to expansion and peculiar motion in the nearby universe ($z<0.1$) is critical for using Type Ia Supernovae (SNe Ia) to measure the Hubble constant ($H_0$) and the equation-of-state parameter of dark…

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