Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Ryan Hausen, Brant E. Robertson, Hanjue Zhu, Nickolay Y. Gnedin, Piero Madau | Summary: Understanding the connections between galaxy stellar mass, star formation rate, and dark matter halo mass represents a key goal of the theory of galaxy formation. Cosmological simulations that include hydrodynamics, physical treatments […]
Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Elias K. Oakes, Taylor J. Hoyt, Wendy L. Freedman, Barry F. Madore, Quang H. Tran | Summary: We determine three independent Population II distance moduli to the Fornax dwarf spheroidal (dSph) galaxy, using wide-field, ground-based $VI$ imaging acquired with the Magellan-Baade telescope at Las Campanas Observatory. […]
Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Elias K. Oakes, Taylor J. Hoyt, Wendy L. Freedman, Barry F. Madore, Quang H. Tran | Summary: We determine three independent Population II distance moduli to the Fornax dwarf spheroidal (dSph) galaxy, using wide-field, ground-based $VI$ imaging acquired with the Magellan-Baade telescope at Las Campanas Observatory. […]
Kavli Affiliate: Albert Stebbins | First 5 Authors: Shijie Sun, Jixia Li, Fengquan Wu, Peter Timbie, Reza Ansari | Summary: A great challenge for 21 cm intensity mapping experiments is the strong foreground radiation which is orders of magnitude brighter than the 21cm signal. Removal of the foreground takes advantage of the fact that its […]
Kavli Affiliate: Daniel Holz | First 5 Authors: Pierre Auclair, David Bacon, Tessa Baker, Tiago Barreiro, Nicola Bartolo | Summary: The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle […]
Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Nickolay Y. Gnedin, , , , | Summary: I explore the properties of "dark gaps" – regions in quasar absorption spectra without significant transmission – with several simulations from the Cosmic Reionization On Computers (CROC) project. CROC simulations in largest available boxes (120 cMpc) come close […]
Kavli Affiliate: Gordan Krnjaic | First 5 Authors: Kimberly K. Boddy, Gordan Krnjaic, Stacie Moltner, , | Summary: We study dark matter-helium scattering in the early Universe and its impact on constraints from cosmic microwave background (CMB) anisotropy measurements. We describe possible theoretical frameworks for dark matter-nucleon interactions via a scalar, pseudoscalar, or vector mediator; […]
Kavli Affiliate: Austin Joyce | First 5 Authors: Austin Joyce, Alberto Nicolis, Alessandro Podo, Luca Santoni, | Summary: We revisit certain subtleties of renormalization that arise when one derives a low-energy effective action by integrating out the heavy fields of a more complete theory. Usually these subtleties are circumvented by matching some physical observables, such […]
Kavli Affiliate: Katrin Heitmann | First 5 Authors: Jonathan A. Blazek, Doug Clowe, Thomas E. Collett, Ian P. Dell’Antonio, Mark Dickinson | Summary: A new generation of powerful dark energy experiments will open new vistas for cosmology in the next decade. However, these projects cannot reach their utmost potential without data from other telescopes. This […]
Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Lauren Street, Nickolay Y. Gnedin, L. C. R. Wijewardhana, , | Summary: We perform maximum likelihood estimates (MLEs) for single and double flavor ultralight dark matter (ULDM) models using the Spitzer Photometry and Accurate Rotation Curves (SPARC) database. These estimates are compared to MLEs for several […]