The Lyman-α power spectrum—CMB lensing convergence cross-correlation
- Stony Brook Univ., NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
We investigate the three-point correlation between the Lyman-α forest and the CMB weak lensing (δFδFΚ) expressed as the cross-correlation between the CMB weak lensing field and local variations in the forest power spectrum. In addition to the standard gravitational bispectrum term, we note the existence of a non-standard systematic term coming from mis-estimation of the mean flux over the finite length of Lyman-α skewers. We numerically calculate the angular cross-power spectrum and discuss its features. We integrate it into zero-lag correlation function and compare our predictions with recent results by Doux et al.. We nd that our predictions are statistically consistent with the measurement, and including the systematic term improves the agreement with the measurement. We comment on the implication of the response of the Lyman-α forest power spectrum to the long-wavelength density perturbations.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1426439
- Report Number(s):
- BNL-203334-2018-JAAM; TRN: US1802281
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 01; ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Large-scale structure of the Universe and cosmological perturbation theory
|
journal | September 2002 |
Planck 2015 results : XIII. Cosmological parameters
|
journal | September 2016 |
Simulating the effect of high column density absorbers on the one-dimensional Lyman α forest flux power spectrum
|
journal | November 2017 |
Towards physics responsible for large-scale Lyman-α forest bias parameters
|
journal | March 2016 |
| First Detection of Cosmic Microwave Background Lensing and Lyman-α Forest Bispectrum | text | January 2016 |
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