output
19912026
Showing 2016 · astro-ph.COShow all

22 papers · 2 filters

astro-ph.CO2016★ 12 cited

Separate Universes beyond General Relativity

Wayne Hu, Austin Joyce

We establish purely geometric or metric-based criteria for the validity of the separate universe ansatz, under which the evolution of small-scale observables in a long-wavelength p…

astro-ph.CO2016★ 67 cited

On the validity of the Born approximation for beyond-Gaussian weak lensing observables

Andrea Petri, Zoltán Haiman, Morgan May

Accurate forward modeling of weak lensing (WL) observables from cosmological parameters is necessary for upcoming galaxy surveys. Because WL probes structures in the non-linear reg…

astro-ph.CO2016★ 135 cited

The Atacama Cosmology Telescope: Two-Season ACTPol Lensing Power Spectrum

Blake D. Sherwin, Alexander van Engelen, Neelima Sehgal +43

We report a measurement of the power spectrum of cosmic microwave background (CMB) lensing from two seasons of Atacama Cosmology Telescope Polarimeter (ACTPol) CMB data. The CMB le…

astro-ph.CO2016★ 218 cited

The Atacama Cosmology Telescope: Two-Season ACTPol Spectra and Parameters

Thibaut Louis, Emily Grace, Matthew Hasselfield +80

We present the temperature and polarization angular power spectra measured by the Atacama Cosmology Telescope Polarimeter (ACTPol). We analyze night-time data collected during 2013…

astro-ph.CO2016★ 343 cited

Grackle: a Chemistry and Cooling Library for Astrophysics

Britton D. Smith, Greg L. Bryan, Simon C. O. Glover +11

We present the Grackle chemistry and cooling library for astrophysical simulations and models. Grackle provides a treatment of non-equilibrium primordial chemistry and cooling for…

astro-ph.CO2016★ 1.7k cited

Ultralight scalars as cosmological dark matter

Lam Hui, Jeremiah P. Ostriker, Scott Tremaine +1

An intriguing alternative to cold dark matter (CDM) is that the dark matter is a light ( eV) boson having a de Broglie wavelength kpc, often called fuzz…

astro-ph.CO2016★ 2 cited

Cyclic completion of the anamorphic universe

Anna Ijjas

Cyclic models of the universe have the advantage of avoiding initial conditions problems related to postulating any sort of beginning in time. To date, the only known viable exampl…

astro-ph.CO2016★ 32 cited

Do dark matter halos explain lensing peaks?

José Manuel Zorrilla Matilla, Zoltán Haiman, Daniel Hsu +2

We have investigated a recently proposed halo-based model, Camelus, for predicting weak-lensing peak counts, and compared its results over a collection of 162 cosmologies with thos…

astro-ph.CO2016★ 134 cited

XENON100 Dark Matter Results from a Combination of 477 Live Days

XENON100 Collaboration, E. Aprile, J. Aalbers +114

We report on WIMP search results of the XENON100 experiment, combining three runs summing up to 477 live days from January 2010 to January 2014. Data from the first two runs were a…

astro-ph.CO2016★ 50 cited

CMB Lensing Beyond the Power Spectrum: Cosmological Constraints from the One-Point PDF and Peak Counts

Jia Liu, J. Colin Hill, Blake D. Sherwin +3

Unprecedentedly precise cosmic microwave background (CMB) data are expected from ongoing and near-future CMB Stage-III and IV surveys, which will yield reconstructed CMB lensing ma…

astro-ph.CO2016★ 98 cited

Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

F. De Bernardis, S. Aiola, E. M. Vavagiakis +55

We present a new measurement of the kinematic Sunyaev-Zeldovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS).…

astro-ph.CO2016★ 59 cited

Mocking the Weak Lensing universe: the LensTools python computing package

Andrea Petri

We present a newly developed software package which implements a wide range of routines frequently used in Weak Gravitational Lensing (WL). With the continuously increasing size of…

astro-ph.CO2016★ 49 cited

The Origin of Weak Lensing Convergence Peaks

Jia Liu, Zoltan Haiman

Weak lensing convergence peaks are a promising tool to probe nonlinear structure evolution at late times, providing additional cosmological information beyond second-order statisti…

astro-ph.CO2016★ 159 cited

Are we witnessing the epoch of reionisation at from the spectrum of J1120+0641?

Bradley Greig, Andrei Mesinger, Zoltán Haiman +1

We quantify the presence of Lyα damping wing absorption from a partially-neutral intergalactic medium (IGM) in the spectrum of the QSO, ULASJ1120+0641. Using a Bayesian fr…

astro-ph.CO2016★ 87 cited

The Kinematic Sunyaev-Zel'dovich Effect with Projected Fields II: prospects, challenges, and comparison with simulations

Simone Ferraro, J. Colin Hill, Nick Battaglia +2

The kinematic Sunyaev-Zel'dovich (kSZ) signal is a powerful probe of the cosmic baryon distribution. The kSZ signal is proportional to the integrated free electron momentum rather…

astro-ph.CO2016★ 128 cited

A low-mass dark matter search using ionization signals in XENON100

XENON100 Collaboration, E. Aprile, J. Aalbers +108

We perform a low-mass dark matter search using an exposure of 30\,kgyr with the XENON100 detector. By dropping the requirement of a scintillation signal and using only the…

astro-ph.CO2016★ 29 cited

Cosmology with photometric weak lensing surveys: constraints with redshift tomography of convergence peaks and moments

Andrea Petri, Morgan May, Zoltán Haiman

Weak gravitational lensing is becoming a mature technique for constraining cosmological parameters, and future surveys will be able to constrain the dark energy equation of state $…

astro-ph.CO2016★ 3 cited

Consequences of CCD imperfections for cosmology determined by weak lensing surveys: From laboratory measurements to cosmological parameter bias

Yuki Okura, Andrea Petri, Morgan May +2

Weak gravitational lensing causes subtle changes in the apparent shapes of galaxies due to the bending of light by the gravity of foreground masses. By measuring the shapes of larg…

astro-ph.CO2016★ 38 cited

Shock finding on a moving-mesh: II. Hydrodynamic shocks in the Illustris universe

Kevin Schaal, Volker Springel, Rüdiger Pakmor +7

Hydrodynamical shocks are a manifestation of the non-linearity of the Euler equations and play a fundamental role in cosmological gas dynamics. In this work, we identify and analys…

astro-ph.CO2016★ 160 cited

The Kinematic Sunyaev-Zel'dovich Effect with Projected Fields: A Novel Probe of the Baryon Distribution with Planck, WMAP, and WISE Data

J. Colin Hill, Simone Ferraro, Nick Battaglia +2

The kinematic Sunyaev-Zel'dovich (kSZ) effect --- the Doppler boosting of cosmic microwave background (CMB) photons due to Compton-scattering off free electrons with non-zero bulk…

astro-ph.CO2016★ 47 cited

Sample variance in weak lensing: how many simulations are required?

Andrea Petri, Zoltán Haiman, Morgan May

Constraining cosmology using weak gravitational lensing consists of comparing a measured feature vector of dimension with its simulated counterpart. An accurate estimate of t…

astro-ph.CO2016★ 35 cited

Constraining Multiplicative Bias in CFHTLenS Weak Lensing Shear Data

Jia Liu, Alvaro Ortiz-Vazquez, J. Colin Hill

Several recent cosmological analyses have found tension between constraints derived from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) data and those derived from ot…