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| Open AccessSearching for ultra-light bosons and constraining black hole spin distributions with stellar tidal disruption events
Stellar tidal disruption events (TDEs) occur when stars pass close enough to supermassive black holes. Here, the authors show that future searches TDEs have potential to uncover the existence of ultralight bosons.
- Peizhi Du
- , Daniel Egaña-Ugrinovic
- & Rosalba Perna
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Article
| Open AccessAnalogue cosmological particle creation in an ultracold quantum fluid of light
Under certain conditions light can act as a fluid like a Bose-Einstein condensate. Here the authors discuss an analogy of cosmological particle creation using such a quantum fluid of light.
- Jeff Steinhauer
- , Murad Abuzarli
- & Quentin Glorieux
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Article
| Open AccessStrongly lensed repeating fast radio bursts as precision probes of the universe
Fast radio bursts (FRBs) are likely to be gravitationally lensed by intervening galaxies. Here, the authors propose to make accurate measurements of time delays between images of lensed FRBs as a powerful probe for precision cosmology.
- Zheng-Xiang Li
- , He Gao
- & Bing Zhang
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Article
| Open AccessNo tension between assembly models of super massive black hole binaries and pulsar observations
Pulsar timing arrays enable the search for the isotropic gravitational-wave (GW) background originating from super massive black hole binary populations, but impose a stringent upper limit on the GW characteristic amplitude. Here, the authors use Bayesian hierarchical modelling applied to a range of astrophysical scenarios to revisit the implications of this upper limit.
- Hannah Middleton
- , Siyuan Chen
- & Alberto Vecchio
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Article
| Open AccessPrecision cosmology from future lensed gravitational wave and electromagnetic signals
Gravitational wave sources can be used as cosmological probes through a direct distance luminosity relation. Here, the authors demonstrate that the time delay between lensed gravitational wave signals and their electromagnetic counterparts can reduce the uncertainty in the Hubble constant.
- Kai Liao
- , Xi-Long Fan
- & Zong-Hong Zhu
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Article
| Open AccessMeasurement of the cosmic optical background using the long range reconnaissance imager on New Horizons
The cosmic optical background is an important cosmological observable. Here the authors show that a direct observation of the background brightness from the outer solar system can be obtained by the LORRI instrument aboard the New Horizons mission, on the basis of data acquired between Jupiter and Uranus.
- Michael Zemcov
- , Poppy Immel
- & Andrew R. Poppe
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Review Article |
Quantum metrology for gravitational wave astronomy
Gravitational waves are predicted by general relativity, but their direct observation from astronomical sources hinges on large improvements in detection sensitivity. The authors review how squeezed light and other quantum optical concepts are being applied in the development of next generation interferometric detectors.
- Roman Schnabel
- , Nergis Mavalvala
- & Ping K. Lam