Following detection by LIGO and Virgo, gravitational wave (GW) stocks are on the rise. Despite their outstanding capabilities, ground based detectors are only sensitive to GW sources in the audio band. Conversely, the low frequency GW Universe, from nHz to mHz, is the exploration playground of future spaceborne interferometers such as the Laser Interferometer Space Antenna (LISA) and ongoing...
In my talk, I will provide an overview about gravitational lensing applied to gravitational wave emission. I will start with the definition of lensing, discussing how it affects the gravitational signal from a source, with a focus on the differences between geometrical and wave optics regime. Next, I will describe what we expect to see in the cases of strongly and weakly lensed signals and why...
I will review the physics of gravitational lensing and its impact on the propagation of gravitational wave (GW) signals. I will discuss the current methods for identifying strongly lensed GW events, including posterior overlap integral estimation.
I will then introduce a new machine learning-based approach designed to distinguish strongly lensed GW events from independent signals. Given the...
Extreme mass-ratio inspirals (EMRIs) of a stellar-mass compact object into a massive black hole are a unique science target of LISA. As a consequence of their mass ratios, these systems complete tens of thousands of orbits, and have intricate gravitational-wave signals. This means that we can make precision measurements of EMRI sources. Using these precise measurements, we can probe the...
The formation and evolution of massive black holes (MBHs) is an
unresolved mystery in astrophysics.
A primary goal of the Laser Interferometer Space Antenna (LISA) mission
is therefore to study massive black holes (MBHs) and their environments
from their gravitational wave emission in binary systems.
One class of these systems are extreme-mass-ratio inspirals (EMRIs), in
which a...
One of the primary sources of gravitational waves (GWs) anticipated to be detected by the Laser Interferometer Space Antenna (LISA) are galactic double white dwarf binaries (DWDs). However, most of these binaries will be unresolved, and their GWs will overlap incoherently, creating a stochastic noise known as the galactic foreground. Similarly, the population of unresolved systems in the Milky...
One of the longest-standing science targets of gravitational-wave detetors are spinning deformed neutron stars. While exceedingly weak and hence still eluding detection, "continuous waves" from such individual objects will bring a new regime of gravitational astrophysics where we can keep observing the same source over and over and perform rich multi-messenger studies. In addition, neutron...
Gravitational waves (GWs) induce characteristic oscillations in the observed positions of distant stars over time. This effect can potentially be captured by astrometric observations, such as those conducted by the Gaia mission, offering a promising method for detecting GWs by measuring tiny changes in the angular separations between pairs of point-like sources—effectively acting as...
In nuclear clusters, massive black holes (MBHs) are surrounded by numerous stars and compact objects. In these high-density environments, two-body interactions between orbiting objects occur frequently, potentially leading to the formation of extreme mass ratio inspirals (EMRIs). In this work, we present a novel post-Newtonian Monte Carlo approach to locally account for the effects of two-body...
