4th Meeting on Gravitational Wave Science in Denmark-Norway

Contribution List

8. Studying first-order phase transitions numerically

Anders Tranberg (UiS - TN - IMF)

23/05/2024, 13:00

Contributed talk

3. Measuring first-order phase transitions at LISA

Germano Nardini (UiS TN IMF)

23/05/2024, 13:30

Contributed talk

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...

5. Cosmic redshift drift in gravitational waveforms

Asta Heinesen (Niels Bohr Institute)

23/05/2024, 14:00

Contributed talk

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...

2. Possible Causes of False General Relativity Violations in Gravitational Wave Observations

Alex Nielsen

23/05/2024, 15:00

Contributed talk

12. Looking for new physics beyond the merger of black holes

Jahed Abedi (University of Stavanger)

23/05/2024, 15:30

Contributed talk

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...

11. Measuring deviations from Kerr using LVK ringdown data

Zaryab Ahmed (Universitetet i Stavanger)

23/05/2024, 16:00

Contributed talk

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...

4. Gravitational waves from a non-abelian dark sector coupled to axion inflation

Helena Kolesova (University of Stavanger)

24/05/2024, 09:30

Contributed talk

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...

16. Gravitational waves from strongly interacting dark matter

Daniil Krichevskiy (University of Stavager)

24/05/2024, 10:00

Contributed talk

13. Prospects for gravitationally-lensed gravitational-wave transients

Rico Lo (Niels Bohr Institute)

24/05/2024, 10:30

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...

9. Gravitational waves and equation of state inference

Aleksi Kurkela (Univ. Stavanger)

24/05/2024, 11:30

Contributed talk

10. Equation of state of neutron stars

Oleg Komoltsev (University of Stavanger)

24/05/2024, 12:00

Contributed talk

14. Detecting Gravitational Waves Using the Moon

Mathias Pavely Nødtvedt (NTNU (Norwegian University of Science and Technology))

24/05/2024, 12:30

Contributed talk

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,...

15. Tales from a LIGO shifter and other stuff Vegard does

Mr Vegard Undheim (University of Stavanger - TN - IMF)

24/05/2024, 13:00

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.