A decihertz space gravitational-wave detector paired with a ground network would localize compact binary mergers far more precisely than the ground network alone, supporting standard-siren cosmology, early warning, and studies of white dwarfs, black holes, and intermediate-mass black holes.
Type Ia Supernovae as Stellar Endpoints and Cosmological Tools
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abstract
Empirically, Type Ia supernovae are the most useful, precise, and mature tools for determining astronomical distances. Acting as calibrated candles they revealed the presence of dark energy and are being used to measure its properties. However, the nature of the SN Ia explosion, and the progenitors involved, have remained elusive, even after seven decades of research. But now new large surveys are bringing about a paradigm shift --- we can finally compare samples of hundreds of supernovae to isolate critical variables. As a result of this, and advances in modeling, breakthroughs in understanding all aspects of SNe Ia are finally starting to happen.
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Astrophysics and cosmology with a decihertz gravitational-wave detector: TianGO
A decihertz space gravitational-wave detector paired with a ground network would localize compact binary mergers far more precisely than the ground network alone, supporting standard-siren cosmology, early warning, and studies of white dwarfs, black holes, and intermediate-mass black holes.