Kavli Affiliate: George Clark| First 5 Authors: The LIGO Scientific Collaboration, The LIGO Scientific Collaboration, , , | Summary:On 2023 November 23 the two LIGO observatories both detected GW231123, a gravitational-wave signal consistent with the merger of two black holes with masses $137^+23_-18, M_odot$ and $101^+22_-50, M_odot$ (90% credible intervals), at luminosity distance 0.7-4.1 Gpc […]
Kavli Affiliate: Kejia Lee | Summary:Theoretical models predict that intermediate-mass black holes (IMBHs) exist in globular clusters (GCs), but observational evidence remains elusive. Millisecond pulsars (MSPs), which are abundant in GCs and have served as precise probes for gravitational waves (GWs), offer a unique opportunity to detect potential IMBH binaries in GCs. Here, we consider […]
Kavli Affiliate: George Clark | Summary:Radiation belts are regions of magnetically trapped particle radiation found around all of the sufficiently magnetized planets in the Solar System and recently also observed around brown dwarfs, yet despite their ubiquity, there is not yet a general theory or model to predict the uppermost energy limits that any particular […]
Kavli Affiliate: Hitoshi Murayama | Summary:Many models of dark matter QCD axion requires inflation at a scale $H_textinf lesssim 10^6$~GeV and hence does not allow for a detectable tensor mode fluctuation. This is because the domain wall problem forces the Peccei–Quinn symmetry to be broken during the inflation and the axions to be produced by […]
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 source population […]
Kavli Affiliate: Daniel Holz | 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 emphappears to have originated from a closer, more massive system. Thus, high-mass outliers to the gravitational-wave source population are often proposed as natural candidates for strongly lensed […]
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. […]
Kavli Affiliate: Bradford Benson| 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. We identify two […]
Kavli Affiliate: Blake Sherwin | Summary:These notes are very much work-in-progress and simply intended to showcase, in various degrees of details (and rigour), some of the cosmology calculations that class_sz can do. We describe the class_sz code in C, Python and Jax. Based on the Boltzmann code class, it can compute a wide range of […]
Kavli Affiliate: Subo Dong | Summary:We search a sample of 5,685,060 isolated sources in the All Sky Automated Survey for SuperNovae (ASAS-SN) with 14.5<g<15 mag for slowly varying sources with brightness changes larger than ~0.03 mag/year over 10 years. We find 426 slowly-varying systems. Of these systems, 200 are identified as variables for the first […]