Kavli Affiliate: Martin Haehnelt | First 5 Authors: Alessandro Marconi, Manuel Abreu, Vardan Adibekyan, Matteo Aliverti, Carlos Allende Prieto | Summary: HIRES will be the high-resolution spectrograph of the European Extremely Large Telescope at optical and near-infrared wavelengths. It consists of three fibre-fed spectrographs providing a wavelength coverage of 0.4-1.8 mic (goal 0.35-1.8 mic) at […]
Kavli Affiliate: Debora Sijacki | First 5 Authors: Sergio Martin-Alvarez, Harley Katz, Debora Sijacki, Julien Devriendt, Adrianne Slyz | Summary: Despite their ubiquity, there are many open questions regarding galactic and cosmic magnetic fields. Specifically, current observational constraints cannot rule out if magnetic fields observed in galaxies were generated in the Early Universe or are […]
Kavli Affiliate: Debora Sijacki | First 5 Authors: Rosie Y. Talbot, Martin A. Bourne, Debora Sijacki, , | Summary: Jets launched by active galactic nuclei (AGN) are believed to play a significant role in shaping the properties of galaxies and provide an energetically viable mechanism through which galaxies can become quenched. Here we present a […]
Kavli Affiliate: George Efstathiou | First 5 Authors: Emma Shen, Dominic Anstey, Eloy de Lera Acedo, Anastasia Fialkov, Will Handley | Summary: We modelled the two major layer of Earth’s ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the chromatic ionospheric effects on global 21-cm observations. From […]
Kavli Affiliate: E. P. S. Shellard | First 5 Authors: C. J. A. P. Martins, Patrick Peter, I. Yu. Rybak, E. P. S. Shellard, | Summary: We develop an analytic model to quantitatively describe the evolution of superconducting cosmic string networks. Specifically, we extend the velocity-dependent one-scale (VOS) model to incorporate arbitrary currents and charges […]
Kavli Affiliate: George Efstathiou | First 5 Authors: Marta Spinelli, Gianni Bernardi, Hugh Garsden, Lincoln J. Greehill, Anastasia Fialkov | Summary: Total-power radiometry with individual meter-wave antennas is a potentially effective way to study the Cosmic Dawn ($zsim20$) through measurement of sky brightness arising from the $21$~cm transition of neutral hydrogen, provided this can be […]
Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tomas Andrade, Pau Figueras, Ulrich Sperhake, , | Summary: We study collisions of boosted rotating black holes in $D=6$ and 7 spacetime dimensions with a non-zero impact parameter. We find that there exists an open set of initial conditions such that the intermediate state of the collision […]
Kavli Affiliate: Anthony Challinor | First 5 Authors: Thibaut Louis, Sigurd Naess, Xavier Garrido, Anthony Challinor, | Summary: We present a simple approximation that can speed up the computation of the mode-coupling matrices, which are usually the bottleneck for computing unbiased angular power spectra, as well as their associated covariance matrices, of the cosmic microwave […]
Kavli Affiliate: Anthony Challinor | First 5 Authors: Antón Baleato Lizancos, Anthony Challinor, Julien Carron, , | Summary: Efforts to detect a primordial $B$-mode of CMB polarization generated by inflationary gravitational waves ought to mitigate the large variance associated with the $B$-modes produced by gravitational lensing, a process known as delensing. A popular approach to […]
Kavli Affiliate: Anthony Lasenby | First 5 Authors: Michael Hobson, Anthony Lasenby, , , | Summary: We consider Weyl gauge theories of gravity (WGTs), which are invariant both under local Poincar’e transformations and local changes of scale. Such theories may be interpreted as gauge theories in Minkowski spacetime, but their gravitational interactions are most often […]