Publications by authors named "Alejandro Cardenas-Avendano"
Article Synopsis
- The radiation observed from gas falling into a black hole is influenced by the flow details and the black hole's spacetime geometry, resulting in specific light patterns.
- The black hole's lensing creates a unique photon ring with expected light echo peaks in its light curve, but these peaks are generally not seen in actual observations.
- The study presents a model showing that the absence of these peaks occurs if the characteristic correlation timescale of the light source is longer than the delay between light echoes, and this work emphasizes the need for better observation techniques to analyze black hole properties accurately.
The Neutron Star Interior Composition Explorer (NICER) recently measured the mass and equatorial radius of the isolated neutron star PSR J0030+0451. We use these measurements to infer the moment of inertia, the quadrupole moment, and the surface eccentricity of an isolated neutron star for the first time, using relations between these quantities that are insensitive to the unknown equation of state of supranuclear matter. We also use these results to forecast the moment of inertia of neutron star A in the double pulsar binary J0737-3039, a quantity anticipated to be directly measured in the coming decade with radio observations.
View Article and Find Full Text PDF