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

Journal Article · · Bulletin of the American Astronomical Society
OSTI ID:1581336
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [1];  [4];  [7];  [8];  [1];  [1];  [3];  [9];  [10];  [1];  [2];  [1];  [1] more »;  [11];  [1];  [12];  [2];  [8];  [13];  [14];  [15];  [12];  [16] « less
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Sorbonne Univ., Paris (France)
  3. Univ. of Toronto, ON (United States)
  4. Univ. of Rochester, NY (United States)
  5. Univ. de Lyon (France)
  6. Univ. of Queensland, Brisbane, QLD (Australia)
  7. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); American Museum of Natural History, New York, NY (United States)
  8. Univ. Clermont Auvergne, Clermont-Ferrand (France)
  9. Univ. of Western Australia, Crawley, WA (Australia)
  10. Univ. of Michigan, Ann Arbor, MI (United States)
  11. Humboldt-Univ., Berlin, Germany
  12. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  13. Korea Astronomy and Space Science Inst., Daejeon (Korea)
  14. Brookhaven National Lab. (BNL), Upton, NY (United States)
  15. Univ. of Hawaii, Honolulu, HI (United States)
  16. Univ. of Pittsburgh, PA (United States)
+ Show Author Affiliations

In the upcoming 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 $$\gamma$$, which captures the effect of gravity on the linear growth of structure through the relation $$f=\Omega_M^\gamma$$. We present the first projections for the precision in $$\gamma$$ for a range of realistic SN peculiar-velocity survey scenarios. In the next decade the peculiar velocities of SNe Ia in the local $z<0.3$ Universe will provide a measure of $$\gamma$$ to $$\pm 0.01$$ precision that can definitively distinguish between General Relativity and leading models of alternative gravity.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1581336
Journal Information:
Bulletin of the American Astronomical Society, Vol. 51, Issue 3; ISSN 0002-7537
Publisher:
American Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
astrophysics
cosmology
nongalactic astrophysics