dorsal/arxiv
View SchemaProbing General Relativity on Cosmological Scales in the 2040s
| Authors | Federico Montano, Samantha J. Rossiter, Chris Addis, Jessie Hammond, Stefano Camera, Chris Clarkson, Mohamed Yousry Elkhashab, Massimo Guidi, Ofer Lahav, Giovanni Aricò, Sofia Contarini, Pratika Dayal, Giulia Degni, Antonio Farina, Vid Iršič, Federico Marulli, Elena Sarpa, Simone Sartori, Emiliano Sefusatti, Francesco Verdiani, Giovanni Verza |
|---|---|
| Categories | |
| ArXiv ID | 2601.05320vv1 |
| URL | https://arxiv.org/abs/2601.05320 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
General relativity is exquisitely tested in strong-field regimes, yet its validity on cosmological scales remains largely unexplored. Upcoming wide and deep large-scale structure surveys will access the ultra-large, linear scales where relativistic effects - Doppler terms, gravitational redshift, lensing magnification, and potential evolution - leave significant imprints in the clustering of galaxies. These signatures represent unique probes of spacetime that are inaccessible to standard Newtonian analyses but increasingly important as survey volumes grow. We outline the scientific potential of next-generation facilities, such as those envisioned within ESO's Expanding Horizons programme, to deliver the first robust measurements of relativistic effects in large-scale structure through multi-tracer power spectra and the single-tracer bispectrum of high-redshift Lyman-break galaxies. Detecting these contributions would open a new window on gravity, enabling precision tests of general relativity and its alternatives on cosmological scales in the 2040s.
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"abstract": "General relativity is exquisitely tested in strong-field regimes, yet its validity on cosmological scales remains largely unexplored. Upcoming wide and deep large-scale structure surveys will access the ultra-large, linear scales where relativistic effects - Doppler terms, gravitational redshift, lensing magnification, and potential evolution - leave significant imprints in the clustering of galaxies. These signatures represent unique probes of spacetime that are inaccessible to standard Newtonian analyses but increasingly important as survey volumes grow. We outline the scientific potential of next-generation facilities, such as those envisioned within ESO\u0027s Expanding Horizons programme, to deliver the first robust measurements of relativistic effects in large-scale structure through multi-tracer power spectra and the single-tracer bispectrum of high-redshift Lyman-break galaxies. Detecting these contributions would open a new window on gravity, enabling precision tests of general relativity and its alternatives on cosmological scales in the 2040s.",
"arxiv_id": "2601.05320",
"authors": [
"Federico Montano",
"Samantha J. Rossiter",
"Chris Addis",
"Jessie Hammond",
"Stefano Camera",
"Chris Clarkson",
"Mohamed Yousry Elkhashab",
"Massimo Guidi",
"Ofer Lahav",
"Giovanni Aric\u00f2",
"Sofia Contarini",
"Pratika Dayal",
"Giulia Degni",
"Antonio Farina",
"Vid Ir\u0161i\u010d",
"Federico Marulli",
"Elena Sarpa",
"Simone Sartori",
"Emiliano Sefusatti",
"Francesco Verdiani",
"Giovanni Verza"
],
"categories": [
"astro-ph.CO"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Probing General Relativity on Cosmological Scales in the 2040s",
"url": "https://arxiv.org/abs/2601.05320",
"version": "v1"
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