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The 2nd International Conference "Exploring the Energetic Universe 2019"
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Browsing The 2nd International Conference "Exploring the Energetic Universe 2019" by Title

Browsing The 2nd International Conference "Exploring the Energetic Universe 2019" by Title

Now showing items 21-33 of 33

On the Use of Fast Radio Burst Dispersion Measures as Distance Measures[Article]

Kumar, Pawan; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2019-03-19)

Fast radio bursts appear to be cosmological signals whose frequency-time structure provides a dispersion measure. The dispersion measure is a convolution of the cosmic distance element and the electron density, and contains ...
Photometric Supernovae Redshift Systematics Requirements [Article]

Linder, Eric V.; Mitra, Ayan (NURIS; Energetic Cosmos Laboratory, 2019-07-03)

Imaging surveys will find many tens to hundreds of thousands of Type Ia supernovae in the next decade, and measure their light curves. In addition to a need for characterizing their types and subtypes, a redshift is required ...
Probing features in inflaton potential and reionization history with future CMB space observations

Hazra, Dhiraj Kumar; Paoletti, Daniela; Ballardini, Mario; Finelli, Fabio; Shafieloo, Arman; Smoot, George F; Starobinsky, Alexei A. (NURIS; Energetic Cosmos Laboratory, 2018-03-04)

We consider the prospects of probing features in the primordial power spectrum with future Cosmic Microwave Background (CMB) polarization measurements. In the scope of the inflationary scenario, such features in the spectrum ...
Reinterpreting Low Frequency LIGO/Virgo Events as Magnified Stellar-Mass Black Holes at Cosmological Distances

Broadhurst, Tom; Diego, Jose M.; Smoot III, George (NURIS; Energetic Cosmos Laboratory, 2018-02-14)

Gravitational waves can be focussed by the gravity of an intervening galaxy, just like light, thereby magnifying binary merging events in the far Universe. High magnification by galaxies is found to be responsible for the ...
Reionization in the dark and the light from Cosmic Microwave Background

Hazra, Dhiraj Kumar; Paoletti, Daniela; Finelli, Fabio; Smoot, George F. (NURIS; Energetic Cosmos Laboratory, 2018-07-14)

We explore the constraints on the history of reionization from Planck 2015 CosmicMicrowave Background (CMB) data and we derive the forecasts for future CMB observations.We consider a class of monotonic histories of ...
Slicing the vacuum: New accelerating mirror solutions of the dynamical Casimir effect

Good, Michael R.R.; Linder, Eric V. (American Physical Society, 2017-12-22)

Radiation from accelerating mirrors in a Minkowski spacetime provides insights into the nature of horizons, black holes, and entanglement entropy. We introduce new, simple, symmetric and analytic moving mirror solutions ...
Subpercent Accurate Fitting of Modified Gravity Growth

Denissenya, Mikhail; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2017-09-25)

Adding to our previous method for dealing with gravitational modifications at redshiftz&3through a single parameter, we investigate treatment of lower redshift modifications to linear growth observables. We establish sub ...
Twin LIGO/Virgo Detections of a Viable Gravitationally-Lensed Black Hole Merger

Broadhurst, Tom; Smoot, George F.; Diego, Jose M. (NURIS; Energetic Cosmos Laboratory, 2019-01-10)

We identify a binary black hole (BBH) merger that appears to be multiply lensed by an intervening galaxy. The LIGO/Virgo events GW170809 and GW170814 have indistinguishable waveforms separated by 5 days, and overlap on the ...
Vacuum phase transition solves the H0 tension

Di Valentino, Eleonora; Linder, Eric V. (American Physical Society, 2018-02-23)

Taking the Planck cosmic microwave background data and the more direct Hubble constant measurement data as unaffected by systematic offsets, the values of the Hubble constant $H_0$ interpreted within the $\Lambda$CDM ...
The Well-Tempered Cosmological Constant

Appleby, Stephen; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2018-05-01)

Self tuning is one of the few methods for dynamically cancelling a large cosmological constantand yet giving an accelerating universe. Its drawback is that it tends to screen all sources of energydensity, including matter. ...
Will Gravitational Wave Sirens Determine the Hubble Constant? [Article]

Shafieloo, Arman; Keeley, Ryan E.; Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2018-12-19)

Lack of knowledge about the background expansion history of the Universe from independent observations makes it problematic to obtain a precise and accurate estimation of the Hubble constant H0 from gravitational wave ...
Witnessing the reionization history using Cosmic Microwave Background observation from Planck

Hazra, Dhiraj Kumar; Smoot, George F (NURIS; Energetic Cosmos Laboratory, 2017-12-11)

We constrain the history of reionization using the data from Planck 2015 Cosmic Microwave Background (CMB) temperature and polarization anisotropy observations. We also use prior constraints on the reionization history at ...
Λ is Coming: Parametrizing Freezing Fields

Linder, Eric V. (NURIS; Energetic Cosmos Laboratory, 2018-03-21)

We explore freezing dark energy, where the evolution of the field approaches that of a cosmological constant at late times. We propose two general, two-parameter forms to describe the class of freezing field models, in ...