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Revealing Double White Dwarf Mergers with Multi-messenger Signals
- Source :
- Research in Astronomy and Astrophysics, 22:105014 (10pp), 2022 October
- Publication Year :
- 2022
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Abstract
- A significant number of double white dwarfs (DWDs) are believed to merge within the Hubble time due to the gravitational wave (GW) emission during their inspiraling phase. The outcome of a DWD system is either a type Ia Supernova as the double-degenerate model, or a massive, long-lasting merger remnant. Expected multi-messenger signals of these events will help us to distinguish detailed merging physical processes. In this work, we aim to provide a generic scenario of DWD merging, investigate the emission of all major messengers, with a focus on GWs and neutrinos. Our goal is to provide some guidance for current and future (collaborative) efforts of multi-messenger observations. Throughout the merging evolution of a DWD system, different messengers (GW, neutrino and electromagnetic wave) will dominate at different times. In this work, we show that DWD merger events located at the distance of 1 kpc can indeed produce detectable signals of GWs and neutrinos. The GW frequency are in 0.3-0.6 Hz band around 10 days before tidal disruption begin. We estimate that in optimistic situations, the neutrino number detected by upcoming detectors such as JUNO and Hyper-Kamiokande can reach O(1) for a DWD merging event at $\sim$ 1 kpc.<br />Comment: 14pages, 5 figures
- Subjects :
- Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Database :
- arXiv
- Journal :
- Research in Astronomy and Astrophysics, 22:105014 (10pp), 2022 October
- Publication Type :
- Report
- Accession number :
- edsarx.2208.14138
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1674-4527/ac8d7e