Testing <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math>-free <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>f</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>Q</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math> cosmology

Abstract

We study a model of symmetric teleparallel gravity that is able to account for the current accelerated expansion of the Universe without the need for a dark energy component. We investigate this model by making use of dynamical system analysis techniques to identify the regions of the parameter space with viable cosmologies and constrain it using type-Ia supernovae (SnIa) and cosmic microwave background (CMB) data, and make forecasts using standard siren (SS) events. We conclude that this model is disfavored with respect to $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$, and forthcoming standard siren events can be decisive in testing the viability of the model.

Topics & Concepts