Kavli Affiliate: Emil J. Martinec | First 5 Authors: Emil J. Martinec, Emil J. Martinec, , , | Summary: Supergravity solutions describing supersymmetric rotating bound states of NS fivebranes, fundamental strings and momentum can sometimes have an ergoregion but no horizon. In such supersymmetric ergoregions, there is an unusual feature that there exist BPS "excitations" […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Anirudh Chiti, Anirudh Chiti, , , | Summary: Stars that contain only trace amounts of elements heavier than helium, referred to as having low "metallicity", preserve the chemical fingerprints of the first generation of stars and supernovae. In the Milky Way, the lowest metallicity stars show […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Vedant Chandra, Vedant Chandra, , , | Summary: The fifth-generation Sloan Digital Sky Survey (SDSS-V) is conducting the first all-sky low-resolution spectroscopic survey of the Milky Way’s stellar halo. We describe the stellar parameter pipeline for the SDSS-V halo survey, which simultaneously models spectra, broadband photometry, […]
Kavli Affiliate: Gordan Krnjaic | First 5 Authors: Dan Hooper, Dan Hooper, , , | Summary: We explore a simple and predictive dark matter scenario involving a complex scalar field, $phi$, coupled to the Higgs portal with no additional field content. In the UV, the field possesses a global $U(1)$ symmetry which is broken by […]
Kavli Affiliate: Katrin Heitmann | First 5 Authors: Stephen A. Walsh, Stephen A. Walsh, , , | Summary: Understanding the structure of our universe and the distribution of matter is an area of active research. As cosmological surveys grow in complexity, the development of emulators to efficiently and effectively predict matter power spectra is essential. […]
Kavli Affiliate: Austin Joyce | First 5 Authors: Kurt Hinterbichler, Kurt Hinterbichler, , , | Summary: We describe a Higgs mechanism for the partially massless graviton. In order to do so, we first construct a covariant fracton-like effective field theory on de Sitter space that linearly realizes a dipolar shift symmetry. The global symmetry of […]
Kavli Affiliate: Eric Oberla | First 5 Authors: Jaime Álvarez-Muñiz, Jaime Álvarez-Muñiz, , , | Summary: The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses large surface arrays of antennas to look for the radio emission from […]
Kavli Affiliate: Michael D. Gladders | First 5 Authors: Joseph F. V. Allingham, Joseph F. V. Allingham, , , | Summary: Massive galaxy clusters act as prominent strong-lenses. Due to a combination of observational biases, cluster evolution and lensing efficiency, most of the known cluster lenses lie typically at $z_lsim0.2-0.7$, with only a few prominent […]
Kavli Affiliate: Daniel Holz | First 5 Authors: Amanda Farah, Amanda Farah, , , | Summary: All gravitational-wave signals are inevitably gravitationally lensed by intervening matter as they propagate through the Universe. When a gravitational-wave signal is magnified, it appears to have originated from a closer, more massive system. Thus, high-mass outliers to the gravitational-wave […]
Kavli Affiliate: Michael D. Gladders | First 5 Authors: Grace Smith, Grace Smith, , , | Summary: We present a strong lensing analysis and reconstruct the mass distribution of SPT-CL J0356-5337, a galaxy cluster at redshift z = 1.034. Our model supersedes previous models by making use of new multi-band HST data and MUSE spectroscopy. […]