Illuminating the Physics of Cosmic Origin and Evolution: A UK Space Frontiers 2035 White Paper
Florian Beutler, Eva-Maria Mueller, Seshadri Nadathur, Yun Wang, David Alonso, Tessa Baker, Sownak Bose, Rebecca Canning, Shaun Cole, Fergus Cullen, Willem Elbers, Pedro Ferreira, Carlos Frenk, Oscar Gonzalez, Or Graur, Boryana Hadzhiyska, Alex Hall, Catherine Heymans

TL;DR
This white paper advocates for a space-based spectroscopic survey mission, SIRMOS, to map high-redshift galaxies, aiming to address fundamental cosmological questions about the universe's origins, expansion, and neutrino masses.
Contribution
It proposes a novel space mission concept, SIRMOS, utilizing advanced instrumentation to conduct an unprecedented large-scale galaxy survey for cosmology.
Findings
Design of a high-throughput spectroscopic survey for 100 million galaxies
Application of advanced space instrumentation technologies in cosmology
Potential to resolve key questions about cosmic inflation and neutrino masses
Abstract
Understanding the Universe's origins and evolution remains one of the most fundamental challenges in modern cosmology. This white paper explores three key science priorities in this field: unravelling the physics of cosmic inflation, investigating the accelerating expansion of the Universe, and precisely measuring the sum of the neutrino masses. Achieving these goals requires a dedicated survey to map the large-scale structure at high redshift in unprecedented detail. We describe how this can be achieved through a mission concept called SIRMOS, providing a high-throughput, highly multiplexed spectroscopic capability to obtain accurate redshifts for over 100 million galaxies over a wide sky area. Such a survey would leverage the deepest existing wide-area photometric catalogues for targeting, with spectra offering continuous 1.25-2.5~m wavelength coverage at moderate resolution,…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Electrical and Electromagnetic Research
