Kavli Affiliate: Kaisey Mandel | Summary:A detailed map of the distribution of dust at high Galactic latitudes is essential for future cosmic microwave background (CMB) polarization experiments because the dust, while diffuse, remains a significant foreground in these regions. We develop a Bayesian model to identify a region of the Hertzsprung-Russell (HR) diagram suited to […]
Kavli Affiliate: Ulrich Sperhake | Summary:LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will expand our view to the millihertz gravitational-wave sky, where a spectacular variety of interesting new sources abound: from millions of ultra-compact binaries in our Galaxy, to […]
Kavli Affiliate: Ulrich Sperhake | Summary:LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will expand our view to the millihertz gravitational-wave sky, where a spectacular variety of interesting new sources abound: from millions of ultra-compact binaries in our Galaxy, to […]
Kavli Affiliate: George Efstathiou | Summary:Axion-like early dark energy (EDE) as an extension to $Λ$CDM has been proposed as a possible solution to the ‘Hubble tension’. We revisit this model using a new cosmic microwave background (CMB) temperature and polarization likelihood constructed from the it Planck NPIPE data release. In a Bayesian analysis, we find […]
Kavli Affiliate: George Efstathiou | First 5 Authors: Stefan Heimersheim, Leiv Rønneberg, Henry Linton, Filippo Pagani, Anastasia Fialkov | Summary: The cosmological 21 cm signal is one of the most promising avenues to study the Epoch of Reionization. One class of experiments aiming to detect this signal is global signal experiments measuring the sky-averaged 21 […]
Kavli Affiliate: Ulrich Sperhake | Summary:We study phenomenological features and stability of boson stars in massless and massive scalar-tensor theory of gravity with Damour-Esposito-Farese coupling. This coupling between the tensor and scalar sectors of the theory leads to a phenomenon called spontaneous scalarization, the onset of which we investigate by numerically computing families of boson-star […]
Kavli Affiliate: Anthony Lasenby | Summary:A variational principle for gauge theories of gravity is presented, which maintains manifest covariance under the symmetries to which the action is invariant, throughout the calculation of the equations of motion and conservation laws. This is performed by deriving explicit manifestly covariant expressions for the Euler–Lagrange variational derivatives and Noether’s […]
Kavli Affiliate: Richard Hills | Summary:The Atacama Large Aperture Submillimeter Telescope (AtLAST) aims to be the premier next generation large diameter (50 meter) single dish observatory capable of observations across the millimeter/submillimeter spectrum, from 30~GHz to 1~THz. AtLAST will be sited in Chile at approximately 5100 meters above sea level, high in the Atacama Desert […]
Kavli Affiliate: Anthony Lasenby | Summary:We use the new QUIJOTE-MFI wide survey (11, 13, 17 and 19 GHz) to produce spectral energy distributions (SEDs), on an angular scale of 1 deg, of the supernova remnants (SNRs) CTB 80, Cygnus Loop, HB 21, CTA 1, Tycho and HB 9. We provide new measurements of the polarized […]
Kavli Affiliate: Anthony Challinor | Summary:We revisit the flat-sky approximation for evaluating the angular power spectra of projected random fields by retaining information about the correlations along the line of sight. With broad, overlapping radial window functions, these line-of-sight correlations are suppressed and are ignored in the Limber approximation. However, retaining the correlations is important […]