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Title: Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys

Abstract

Future Baryon Acoustic Oscillation surveys aim at observing galaxy clustering over a wide range of redshift and galaxy populations at great precision, reaching tenths of a percent, in order to detect any deviation of dark energy from the lambda cold dark matter ( ΛCDM ) model. We utilize a set of paired quasi- N-body FastPM simulations that were designed to mitigate the sample variance effect on the BAO feature and evaluated the BAO systematics as precisely as ~0.01 percent. We report anisotropic BAO scale shifts before and after density field reconstruction in the presence of redshift-space distortions over a wide range of redshift, galaxy/halo biases, and shot noise levels. We test different reconstruction schemes and different smoothing filter scales, and introduce physically motivated BAO fitting models. For the first time, we derive a Galilean-invariant infrared resummed model for halos in real and redshift space. We test these models from the perspective of robust BAO measurements and non-BAO information such as growth rate and non-linear bias. We find that pre-reconstruction BAO scale has moderate fitting-model dependence at the level of 0.1–0.2 percent for matter while the dependence is substantially reduced to less than 0.07 percent for halos. We find that post-reconstructionmore » BAO shifts are generally reduced to below 0.1 percent in the presence of galaxy/halo bias and show much smaller fitting model dependence. Different reconstruction conventions can potentially make a much larger difference on the line-of-sight BAO scale, upto 0.3 percent. Furthermore, the precision (error) of the BAO measurements is quite consistent regardless of the choice of the fitting model or reconstruction convention.« less

Authors:
 [1]; ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [5]
  1. Ohio Univ., Athens, OH (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC and Stanford Univ., Menlo Park, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Institute for Advanced Study, Princeton, NJ (United States)
  5. Univ. of Portsmouth, Portsmouth (United Kingdom); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1468944
Grant/Contract Number:  
[AC02-76SF00515]
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
[ Journal Volume: 479; Journal Issue: 1]; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; (cosmology:) cosmological parameters; (cosmology:) distance scale; (cosmology:) large-scale structure of Universe; cosmology: theory

Citation Formats

Ding, Zhejie, Seo, Hee -Jong, Vlah, Zvonimir, Feng, Yu, Schmittfull, Marcel, and Beutler, Florian. Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys. United States: N. p., 2018. Web. doi:10.1093/mnras/sty1413.
Ding, Zhejie, Seo, Hee -Jong, Vlah, Zvonimir, Feng, Yu, Schmittfull, Marcel, & Beutler, Florian. Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys. United States. doi:10.1093/mnras/sty1413.
Ding, Zhejie, Seo, Hee -Jong, Vlah, Zvonimir, Feng, Yu, Schmittfull, Marcel, and Beutler, Florian. Wed . "Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys". United States. doi:10.1093/mnras/sty1413. https://www.osti.gov/servlets/purl/1468944.
@article{osti_1468944,
title = {Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys},
author = {Ding, Zhejie and Seo, Hee -Jong and Vlah, Zvonimir and Feng, Yu and Schmittfull, Marcel and Beutler, Florian},
abstractNote = {Future Baryon Acoustic Oscillation surveys aim at observing galaxy clustering over a wide range of redshift and galaxy populations at great precision, reaching tenths of a percent, in order to detect any deviation of dark energy from the lambda cold dark matter ( ΛCDM ) model. We utilize a set of paired quasi-N-body FastPM simulations that were designed to mitigate the sample variance effect on the BAO feature and evaluated the BAO systematics as precisely as ~0.01 percent. We report anisotropic BAO scale shifts before and after density field reconstruction in the presence of redshift-space distortions over a wide range of redshift, galaxy/halo biases, and shot noise levels. We test different reconstruction schemes and different smoothing filter scales, and introduce physically motivated BAO fitting models. For the first time, we derive a Galilean-invariant infrared resummed model for halos in real and redshift space. We test these models from the perspective of robust BAO measurements and non-BAO information such as growth rate and non-linear bias. We find that pre-reconstruction BAO scale has moderate fitting-model dependence at the level of 0.1–0.2 percent for matter while the dependence is substantially reduced to less than 0.07 percent for halos. We find that post-reconstruction BAO shifts are generally reduced to below 0.1 percent in the presence of galaxy/halo bias and show much smaller fitting model dependence. Different reconstruction conventions can potentially make a much larger difference on the line-of-sight BAO scale, upto 0.3 percent. Furthermore, the precision (error) of the BAO measurements is quite consistent regardless of the choice of the fitting model or reconstruction convention.},
doi = {10.1093/mnras/sty1413},
journal = {Monthly Notices of the Royal Astronomical Society},
number = [1],
volume = [479],
place = {United States},
year = {2018},
month = {5}
}

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