Testing Gravity Using Type Ia Supernovae Discovered by Next-Generation Wide-Field Imaging Surveys

Journal Article · Mon Mar 18 00:00:00 EDT 2019 · Bulletin of the American Astronomical Society

OSTI ID:1607656

Kim, Alex ^[1]; Antilogus, G.; BenZvi, S.; Gontcho A Gontcho, S.; Alderling, G.; Bahmanyar, A.; Courtois, H.; Davis, T.; Ferraro, S.; Graur, O.; Graziani, R.; Guy, J.; Harper, C.; Hlozek, R.; Howlett, C.; Huterer, D.; Ju, C.; Leget, P.-F.; Linder, E.V.; McDonald, P. ; McDonald, P.; Norden, J.; Nugent, P.; Perlmutter, S.; Regnault, N.; Rigault, M.; Shafieloo, A.; Slosar, A.; Tully, R.B.; White, M.; Wood-Vasey, M.

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); University of Rochester, Dept of Physics and Astronomy

In the next decade cadenced wide-field imaging surveys will increase the number of identified $z<0.3$ Type~Ia supernovae (SNe~Ia) from the hundreds to the hundreds of thousands. The increase in the number density and solid-angle coverage of SNe~Ia, in parallel with improvements in the standardization of their absolute magnitudes, now make them competitive probes of the growth of structure and hence of gravity. The peculiar velocity power spectrum is sensitive to the growth index γ, which captures the effect of gravity on the linear growth of structure through the relation f=ΩγM. We present the first projections for the precision in γ for a range of realistic SN peculiar-velocity survey scenarios. In the upcoming years the peculiar velocities of SNe Ia in the local $z<0.3$ Universe will provide a measure of γ to ±0.01 precision that can definitively distinguish between General Relativity and leading models of alternative gravity.

• Research Organization: Univ. of Rochester, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: Astro2020 Collaboration
• Grant/Contract Number: SC0008475
• OSTI ID: 1607656
• Journal Information: Bulletin of the American Astronomical Society, Journal Name: Bulletin of the American Astronomical Society Journal Issue: 3 Vol. 51; ISSN 0002-7537
• Publisher: American Astronomical Society
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS