Physical Sclerosis by Foreign Body After the Method of C. Sánchez et al

Sênchez, C. F.; Altmann-Canestri, E.; Tropper, U. P.; Barceló, R.; Tkach, E.; Clar, Derek T.

doi:10.1007/978-1-4471-3095-6_252

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Measuring the gravitational lensing effects of voids on background source galaxies has been the subject of several recent studies (Krause et al 2013;Melchior et al 2014;Clampitt & Jain 2015;Sánchez et al 2016). Recently, have also made the first measurement of the effects of voids on the CMB lensing convergence κ.…”

Section: Void Lensingmentioning

confidence: 99%

“…Krause et al 2013). Void lensing of background source galaxies has been studied by Melchior et al (2014); Clampitt & Jain (2015); Sánchez et al (2016), and recently ) made a measurement of CMB lensing by voids. The anisotropic distortion of void shapes in redshift space (Ryden 1995) can be used to test the expansion history of the Universe (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tracing the gravitational potential using cosmic voids

Nadathur

Hotchkiss

Crittenden

2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

The properties of large underdensities in the distribution of galaxies in the Universe, known as cosmic voids, are potentially sensitive probes of fundamental physics. We use data from the MultiDark suite of N -body simulations and multiple halo occupation distribution mocks to study the relationship between galaxy voids, identified using a watershed void-finding algorithm, and the gravitational potential Φ. We find that the majority of galaxy voids correspond to local density minima in larger-scale overdensities, and thus lie in potential wells. However, a subset of voids can be identified that closely trace maxima of the gravitational potential and thus stationary points of the velocity field. We identify a new void observable, λ v , which depends on a combination of the void size and the average galaxy density contrast within the void, and show that it provides a good proxy indicator of the potential at the void location. A simple linear scaling of Φ as a function of λ v is found to hold, independent of the redshift and properties of the galaxies used as tracers of voids. We provide an accurate fitting formula to describe the spherically averaged potential profile Φ(r) about void centre locations. We discuss the importance of these results for the understanding of the evolution history of voids, and for their use in precision measurements of the integrated Sachs-Wolfe effect, gravitational lensing and peculiar velocity distortions in redshift space.

show abstract

Section: Void Lensingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tracing the gravitational potential using cosmic voids

Nadathur

Hotchkiss

Crittenden

2017

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…cosmic voids, have been shown to have great potential for constraining dark energy and testing theories of gravity via several measurements. These measurements include: distance measurement via the Alcock-Paczyński Test (AP) (Ryden 1995;Lavaux & Wandelt 2012;Sutter et al 2014), weak gravitational lensing of voids (Krause et al 2013;Melchior et al 2014;Clampitt & Jain 2014;Gruen et al 2016;Sánchez et al 2016), the signal of the Integrated Sachs-Wolfe (ISW) effect associated with voids (Sachs & Wolfe 1967;Granett, Neyrinck & Szapudi 2008;Nadathur, Hotchkiss & Sarkar 2012;Flender, Hotchkiss & Nadathur 2013;Planck Collaboration et al 2014;Ilić, Langer & Douspis 2013;Cai et al 2014;Kovács & Granett 2015;Planck Collaboration et al 2015;Aiola, Kosowsky & Wang 2015), void ellipticity as a probe for the dark energy equation of state (Lee & Park 2009;Lavaux & Wandelt 2010;Bos et al 2012;Sutter et al 2015;Pisani et al 2015), void abundances and profiles for testing theories of gravity and cosmology (Li, Zhao & Koyama 2012;Clampitt, Cai & Li 2013;Lam et al 2015;Cai, Padilla & Li 2015;Zivick et al 2015; Barreira et al 2015;Massara et al 2015), coupled dark energy (Pollina et al 2016), the nature E-mail: vgd@roe.ac.uk of dark matter (Yang et al 2015), baryon acoustic oscillations in void clustering (Kitaura et al 2015;…”

Section: Introductionmentioning

confidence: 99%

Testing the spherical evolution of cosmic voids

Demchenko¹,

Cai²,

Heymans³

et al. 2016

Mon. Not. R. Astron. Soc.

View full text Add to dashboard Cite

We study the spherical evolution model for voids in ΛCDM, where the evolution of voids is governed by dark energy at an earlier time than that for the whole universe or in overdensities. We show that the presence of dark energy suppresses the growth of peculiar velocities, causing void shell-crossing to occur at progressively later epochs as Ω Λ increases. We apply the spherical model to evolve the initial conditions of N-body simulated voids and compare the resulting final void profiles. We find that the model is successful in tracking the evolution of voids with radii greater than 30 h −1 Mpc, implying that void profiles could be used to constrain dark energy. We find that the initial peculiar velocities of voids play a significant role in shaping their evolution. Excluding the peculiar velocity in the evolution model delays the time of shell crossing.

show abstract

Physical Sclerosis by Foreign Body After the Method of C. Sánchez et al

Cited by 2 publications

References 0 publications

Tracing the gravitational potential using cosmic voids

Tracing the gravitational potential using cosmic voids

Testing the spherical evolution of cosmic voids

Contact Info

Product

Resources

About