Measuring the propagation speed of gravitational waves with LISA
| Autor: | Baker, Tessa, Calcagni, Gianluca, Chen, Anson, Fasiello, Matteo, Lombriser, Lucas, Martinovic, Katarina, Pieroni, Mauro, Sakellariadou, Mairi, Tasinato, Gianmassimo, Bertacca, Daniele, Saltas, Ippocratis D. |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2022/08/031 |
| Popis: | The propagation speed of gravitational waves, $c_T$, has been tightly constrained by the binary neutron star merger GW170817 and its electromagnetic counterpart, under the assumption of a frequency-independent $c_T$. Drawing upon arguments from Effective Field Theory and quantum gravity, we discuss the possibility that modifications of General Relativity allow for transient deviations of $c_T$ from the speed of light at frequencies well below the band of current ground-based detectors. We motivate two representative Ans\"atze for $c_T(f)$, and study their impact upon the gravitational waveforms of massive black hole binary mergers detectable by the LISA mission. We forecast the constraints on $c_T(f)$ obtainable from individual systems and a population of sources, from both inspiral and a full inspiral-merger-ringdown waveform. We show that LISA will enable us to place stringent independent bounds on departures from General Relativity in unexplored low-frequency regimes, even in the absence of an electromagnetic counterpart. Comment: 38+20 pages, 22 figures. V2: Analysis improved, to be published in JCAP |
| Databáze: | arXiv |
| Externí odkaz: |
|