Robyn L. Munoz
A5047891223- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Superconducting Materials and Applications
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Space Satellite Systems and Control
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Planetary Science and Exploration
- Gas Dynamics and Kinetic Theory
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
University of Portsmouth
2023
University of Chile
2017-2022
We present UV, optical, and NIR photometry of the first electromagnetic counterpart to a gravitational wave source from Advanced LIGO/Virgo, binary neutron star merger GW170817. Our data set extends discovery optical at $0.47$ days $18.5$ post-merger, includes observations with Dark Energy Camera (DECam), Gemini-South/FLAMINGOS-2 (GS/F2), {\it Hubble Space Telescope} ({\it HST}). The spectral energy distribution (SED) inferred this $0.6$ is well described by blackbody model $T\approx 8300$...
Abstract We present the second public data release (DR2) from DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new observations with archival Dark Energy Survey, Legacy and other community programs. consists of ∼160,000 exposures that cover >21,000 deg 2 high-Galactic-latitude (∣ b ∣ > 10°) sky in four broadband optical/near-infrared filters ( g , r i z ). provides point-source automatic aperture photometry for ∼2.5 billion astronomical sources a median 5 σ depth =...
Abstract Relativistic cosmology can be formulated covariantly, but in dealing with numerical relativity simulations a gauge choice is necessary. Although observables should gauge-invariant, do not necessarily focus on their computations, while it useful to extract results invariantly. To this end, order invariantly characterize spacetimes resulting from cosmological simulations, we present two different methodologies compute the electric and magnetic parts of Weyl tensor, <?CDATA...
We use numerical relativity simulations to describe the spacetime evolution during nonlinear structure formation in $\Lambda$CDM cosmology. Fully initial conditions are set at an redshift $z\approx 300$, based directly on gauge invariant comoving curvature perturbation $\mathcal{R}_c$ commonly used model early-universe fluctuations. Assigning a simple 3-D sinusoidal $\mathcal{R}_c$, we then have lattice of quasi-spherical over-densities representing idealised dark matter halos connected...
We use numerical relativity simulations to describe the spacetime evolution during nonlinear structure formation in $Λ$CDM cosmology. Fully initial conditions are set at an redshift $z\approx 300$, based directly on gauge invariant comoving curvature perturbation $\mathcal{R}_c$ commonly used model early-universe fluctuations. Assigning a simple 3-D sinusoidal $\mathcal{R}_c$, we then have lattice of quasi-spherical over-densities representing idealised dark matter halos connected through...
In order to invariantly characterise spacetimes resulting from cosmological simulations in numerical relativity, we present two different methodologies compute the electric and magnetic parts of Weyl tensor, $E_{αβ}$ $B_{αβ}$, which construct scalar invariants scalars. The first method is geometrical, computing these tensors full metric, second uses 3+1 slicing formulation. We developed a code for each tested them on five analytic metrics, derived $B_{αβ}$ various scalars constructed with...