4 papers
Bounding axion dark energy
Gary Shiu, Flavio Tonioni, Hung V. Tran
We study cosmological solutions of (pseudo)scalar theories with periodic potentials, in the presence of arbitrary cosmological fluids -- including a cosmological constant of either…
MALLORN: Many Artificial LSST Lightcurves based on Observations of Real Nuclear transients
Dylan Magill, Matt Nicholl, Vysakh Anilkumar +10
The Vera C. Rubin Observatory's 10-Year Legacy Survey of Space and Time (LSST) is expected to produce a hundredfold increase in the number of transients we observe. However, there…
Long-lived SEC violation via DM/DE couplings
Gary Shiu, Flavio Tonioni, Hung V. Tran
We discuss a cosmological scenario where an effective violation of the strong energy condition (SEC) is realized through a coupling between SEC-fulfilling dark matter (DM) and dark…
Analytic bounds on late-time axion-scalar cosmologies
Gary Shiu, Flavio Tonioni, Hung V. Tran
The cosmological dynamics of multiple scalar/pseudoscalar fields are difficult to solve, especially when the field-space metric is curved. This presents a challenge in determining…