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Extracting Primordial Non-Gaussianity without Cosmic Variance
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Recent work has emphasized the possibility to probe non-Gaussianity of local type by measuring the power spectrum of highly biased tracers of large scale structure on very large scales. This method is limited by the cosmic variance, by the finite number of structures on the largest scales, and by the partial degeneracy with other cosmological parameters that can mimic the same effect. We propose an alternative method based on the fact that on large scales, halos are linearly biased, but not stochastic, tracers of dark matter: by correlating a highly biased tracer of large scale structure against an unbiased tracer, one eliminates the cosmic variance error, which can lead to a significant increase in signal to noise. For an ideal survey out to z approximately 2, the error reduction can be as large as a factor of 7, which should guarantee a detection of non-Gaussianity from an all-sky survey of this type.
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“Although measurements of the galaxy power spectrum on very large scales are challenging owing to sky systematics ( Leistedt et al. 2014 ) and cosmic variance, the prospect of using multiple tracers of the same fi eld could signi fi cantly improve the constraining power for this observable ( Seljak 2009 ) .”
From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as Seljak 2009
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Wang, Y., Zhao, G., Zhao, C., Philcox, O. H. E., Alam, S., Tamone, A., de Mattia, A., Ross, A. J., Raichoor, A., Burtin, E., et al. (2020) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staa2593 · Cited by 59
Bayesian field-level inference of primordial non-Gaussianity using next-generation galaxy surveys
Andrews, A., Jasche, J., Lavaux, G., & Schmidt, F. (2023) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stad432 · Cited by 57
Inflation and Early Dark Energy with a Stage II Hydrogen Intensity Mapping ExperimentPreprint
Cosmic Visions 21 Cm Collaboration, Ansari, R., Arena, E. J., Bandura, K., Bull, P., Castorina, E., Chang, T., Chen, S.-F., Connor, L., Foreman, S., et al. (2018) · arXiv (Cornell University) · doi:10.48550/arxiv.1810.09572 · Cited by 56
Yamauchi, D., Takahashi, K., & Oguri, M. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.90.083520 · Cited by 57
Seljak, U. (2012) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2012/03/004 · Cited by 57
Self-citationProspects for constraining the shape of non-Gaussianity with the scale-dependent bias
Noreña, J., Verde, L., Barenboim, G., & Bosch, C. (2012) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2012/08/019 · Cited by 56
Zhao, C., Variu, A., He, M., Forero-Sánchez, D., Tamone, A., Chuang, C.-H., Kitaura, F.-S., TAO, C., Yu, J., Kneib, J., et al. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac390 · Cited by 55
Hotinli, S. C., Meyers, J., Trendafilova, C., Green, D., & van Engelen, A. (2022) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2022/04/020 · Cited by 55
Probing the imprint of interacting dark energy on very large scales
Duniya, D. G. A., Bertacca, D., & Maartens, R. (2015) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.91.063530 · Cited by 55
Renk, J. J., Zumalacárregui, M., & Montanari, F. (2016) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2016/07/040 · Cited by 51
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensing
Ballardini, M., Matthewson, W. L., & Maartens, R. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz2258 · Cited by 55
The halo bispectrum in N-body simulations with non-Gaussian initial conditions
Sefusatti, E., Crocce, M., & Desjacques, V. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.21271.x · Cited by 54
Relativistic effects in galaxy clustering in a parametrized post-Friedmann universe
Lombriser, L., Yoo, J., & Koyama, K. (2013) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.87.104019 · Cited by 53
Adams, C., & Blake, C. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx1529 · Cited by 53
Scale-dependent galaxy bias from massive particles with spin during inflation
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The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field
Hale, C. L., Jarvis, M. J., Delvecchio, I., Hatfield, P., Novak, M., Smolčić, V., & Zamorani, G. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx2954 · Cited by 55
Metadata
- Authors
- Seljak, U.
- Affiliations
- Lawrence Berkeley National Laboratory (US)
- Corresponding author
- Seljak, Uroš
- ORCID
- Seljak, Uroš
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2009-01-15
- Volume
- 102
- Issue
- 2
- Pages
- 021302-021302
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2009350306
- Cited by
- 354
- References
- 22
- Citations by year
- 2026: 13 · 2025: 18 · 2024: 24 · 2023: 18 · 2022: 26 · 2021: 27 · 2020: 31 · 2019: 36 · 2018: 20 · 2017: 15 · 2016: 24 · 2015: 19 · 2014: 14 · 2013: 11 · 2012: 14
- FWCI
- 9.41
- Type
- journal article
- Language
- en
- Open access
- green
- www.zora.uzh.ch
- Licence
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
- arXiv (Cornell University) (submittedVersion)
- Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
- arXiv (Cornell University)
- Zurich Open Repository and Archive (University of Zurich)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
- Keywords
- primordial non-Gaussianity, cosmic variance, local non-Gaussianity, large-scale structure, biased tracers, dark matter halos, halo bias, cross correlation function, power spectrum, signal-to-noise ratio, all-sky survey
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