First Detection of Scale-Dependent Linear Halo Bias in -Body Simulations with Massive Neutrinos
Abstract
Using N-body simulations with massive neutrino density perturbations, we detect the scaledependent linear halo bias with high significance. This is the first time that this effect is detected in simulations containing neutrino density perturbations on all scales, confirming the same finding from separate universe simulations. The scale dependence is the result of the additional scale in the system, i.e. the massive neutrino free-streaming length, and it persists even if the bias is defined with respect to the cold dark matter plus baryon (instead of total matter) power spectrum. The separate universe approach provides a good model for the scale-dependent linear bias, and the effect is approximately 0.25fν and 0.43fν for halos with bias of 1.7 and 3.5, respectively. While the size of the effect is small, it is not insignificant in terms of fν and should therefore be included to accurately constrain neutrino mass from clustering statistics of biased tracers. Furthermore, this feature is a distinct signature of free-streaming particles and cannot be mimicked by other components of the standard cosmological model.
- Authors:
-
- Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stony Brook Univ., Stony Brook, NY (United States)
- Flatiron Institute, New York, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- OSTI Identifier:
- 1497376
- Alternate Identifier(s):
- OSTI ID: 1493103; OSTI ID: 1984852
- Report Number(s):
- BNL-211303-2019-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
- Grant/Contract Number:
- SC0012704; SC0017848; PHY-1620628
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 4; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; scale; halo; linear; neutrino; perterbation; dark matterl baryon; N-body
Citation Formats
Chiang, Chi -Ting, LoVerde, Marilena, and Villaescusa-Navarro, Francisco. First Detection of Scale-Dependent Linear Halo Bias in N-Body Simulations with Massive Neutrinos. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.122.041302.
Chiang, Chi -Ting, LoVerde, Marilena, & Villaescusa-Navarro, Francisco. First Detection of Scale-Dependent Linear Halo Bias in N-Body Simulations with Massive Neutrinos. United States. https://doi.org/10.1103/PhysRevLett.122.041302
Chiang, Chi -Ting, LoVerde, Marilena, and Villaescusa-Navarro, Francisco. Fri .
"First Detection of Scale-Dependent Linear Halo Bias in N-Body Simulations with Massive Neutrinos". United States. https://doi.org/10.1103/PhysRevLett.122.041302. https://www.osti.gov/servlets/purl/1497376.
@article{osti_1497376,
title = {First Detection of Scale-Dependent Linear Halo Bias in N-Body Simulations with Massive Neutrinos},
author = {Chiang, Chi -Ting and LoVerde, Marilena and Villaescusa-Navarro, Francisco},
abstractNote = {Using N-body simulations with massive neutrino density perturbations, we detect the scaledependent linear halo bias with high significance. This is the first time that this effect is detected in simulations containing neutrino density perturbations on all scales, confirming the same finding from separate universe simulations. The scale dependence is the result of the additional scale in the system, i.e. the massive neutrino free-streaming length, and it persists even if the bias is defined with respect to the cold dark matter plus baryon (instead of total matter) power spectrum. The separate universe approach provides a good model for the scale-dependent linear bias, and the effect is approximately 0.25fν and 0.43fν for halos with bias of 1.7 and 3.5, respectively. While the size of the effect is small, it is not insignificant in terms of fν and should therefore be included to accurately constrain neutrino mass from clustering statistics of biased tracers. Furthermore, this feature is a distinct signature of free-streaming particles and cannot be mimicked by other components of the standard cosmological model.},
doi = {10.1103/PhysRevLett.122.041302},
journal = {Physical Review Letters},
number = 4,
volume = 122,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 2019},
month = {Fri Feb 01 00:00:00 EST 2019}
}
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