Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Huanqing Chen, Anna-Christina Eilers, Sarah E. I. Bosman, Nickolay Y. Gnedin, Xiaohui Fan | Summary: Measuring the density of the intergalactic medium using quasar sightlines in the epoch of reionization is challenging due to the saturation of Lyman-$alpha$ absorption. Near a luminous quasar, however, the enhanced […]
Kavli Affiliate: Jonathan L. Rosner | First 5 Authors: Marek Karliner, Jonathan L. Rosner, , , | Summary: The LHCb experiment at CERN has discovered a doubly charmed isoscalar tetraquark $T_{cc}$ with the quantum numbers of $c c bar u bar d$ and mass of about 3875 MeV/$c^2$, decaying to $D^0 D^0 pi^+$ through the […]
Kavli Affiliate: Albert Stebbins | First 5 Authors: Christina Gao, Albert Stebbins, , , | Summary: In this paper we study how a Yukawa coupling of the Standard Model fermions to a light scalar field effects the stellar structure of cold stellar remnants such as neutron stars. We elucidate the stellar structure phenomenology using a […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Ting S. Li, Alexander P. Ji, Andrew B. Pace, Denis Erkal, Sergey E. Koposov | Summary: We report the kinematic, orbital, and chemical properties of 12 stellar streams with no evident progenitors, using line-of-sight velocities and metallicities from the Southern Stellar Stream Spectroscopic Survey ($S^5$), proper […]
Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Abigail J. Lee, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, In Sung Jang | Summary: The recently-developed J-region Asymptotic Giant Branch (JAGB) method has extraordinary potential as an extragalactic standard candle, capable of calibrating the absolute magnitudes of locally-accessible Type Ia supernovae, thereby leading […]
Kavli Affiliate: Lindsey Bleem | First 5 Authors: Eve Kovacs, Yao-Yuan Mao, Michel Aguena, Anita Bahmanyar, Adam Broussard | Summary: Large simulation efforts are required to provide synthetic galaxy catalogs for ongoing and upcoming cosmology surveys. These extragalactic catalogs are being used for many diverse purposes covering a wide range of scientific topics. In order […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Mithi A. C. de los Reyes, Evan N. Kirby, Alexander P. Ji, Evan H. Nuñez, | Summary: We demonstrate that using up to seven stellar abundance ratios can place observational constraints on the star formation histories (SFHs) of Local Group dSphs, using the Sculptor dSph as […]
Kavli Affiliate: Stephan S. Meyer | First 5 Authors: Nathaniel Selub, Frederick Wehlen, Craig Hogan, Stephan S. Meyer, | Summary: We examine all-sky cosmic microwave background (CMB) temperature maps on large angular scales to test consistency with a hypothesized cosmological symmetry: a universal variance of primordial curvature perturbations on great circles. This symmetry is not […]
Kavli Affiliate: Stephan Meyer | First 5 Authors: Nathaniel Selub, Frederick Wehlen, Craig Hogan, Stephan S. Meyer, | Summary: We examine all-sky cosmic microwave background (CMB) temperature maps on large angular scales to compare their consistency with two scenarios: the standard inflationary quantum picture, and a distribution constrained to have a universal variance of primordial […]
Kavli Affiliate: Daniel Holz | First 5 Authors: Douglas Tucker, Matthew Wiesner, Sahar Allam, Marcelle Soares-Santos, Clecio de Bom | Summary: On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star-black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, designated […]