The LISA mission has been adopted, with launch scheduled in 2035. This leaves us with just a decade to complete the data analysis pipelines and prepare the science interpretation of the potentially observed signals. In this talk we will briefly review the status of the mission, some possible data analysis approaches to isolate the primordial stochastic GW background (SGWB), and some potential...
For a merger located at a constant redshift, the redshift of the merger is degenerate with the chirp mass of the system in the measured waveform. However, when the redshift can no longer be considered a constant over the duration of the merger in band, this degeneracy is broken. When the Universe undergoes accelerated expansion, the redshift to sources will grow in time, a signal that is in...
Black Holes are possibly the most enigmatic objects in our Universe. These cosmic enigmas continue to be active arenas for strong gravity and quantum effects, providing fertile ground for exploring elusive aspects of quantum gravity. Indeed, there are strong motivations for why Quantum black holes may be radically different from their classical counterparts in Einstein's General Relativity...
According to the black hole no-hair theorem, the emitted ringdown spectra are constrained by the mass and spin of the remnant black hole and thus offer an excellent test of the Kerr-nature of black holes. As a parameterization of beyond-Kerr effects, we employ the Johannsen-Psaltis metric ansatz and analyze the ringdown of two binary black hole merger events- GW150914 and GW190521 to constrain...
Taking axion inflation as an example, we study the evolution of a non-Abelian dark sector coupled to the inflaton for different choices of the confinement scale. For confinement scales just a few orders of magnitude below the Planck scale, large temperatures are reached in the dark sector and gravitational wave signal could be generated due to fluctuations in the thermal plasma. Another...
With the Advanced LIGO and Virgo detector network in operation, we now routinely detect gravitational-wave (GW) transients such as binary black hole mergers at cosmological distances, directly confirming one of the major predictions from general relativity. As another famous prediction from the theory, it has already been observed that light can be deflected in the presence of a gravitational...
It has been suggested to measure the eigenmodes of the Moon excited by gravitational waves. Such a resonant bar detector could become a valuable partner observatory for gravitational waves working alongside LISA and other future detectors. I will discuss in this talk the excitation of resonant eigenmodes by gravitational waves within Einstein and Brans-Dicke gravity. In the latter case,...
In this talk I will present publically available information on the candidate event S231123a, which was detected while I was on shift for PyCBC-live. Remaining time might be filled with other stuff.
