Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy–Galaxy and Galaxy–Mass Power Spectra

Journal Article · 09 January 2019 · The Astrophysical Journal (Online)

DOI: https://doi.org/10.3847/1538-4357/aaf3a9 · OSTI ID:1595411

Yoon, Mijin  ^[1]; Jee, M. James  ^[2]; Tyson, J. Anthony  ^[3]; Schmidt, Samuel  ^[3]; Wittman, David  ^[3]; Choi, Ami ^[4]

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1. Yonsei Univ., Seoul (Korea); University of California, Davis
2. Yonsei Univ., Seoul (Korea); Univ. of California, Davis, CA (United States)
3. Univ. of California, Davis, CA (United States)
4. The Ohio State Univ., Columbus, OH (United States)

We present cosmological parameter measurements from the Deep Lens Survey (DLS) using galaxy–mass and galaxy–galaxy power spectra in the multipole range ℓ = 250–2000. We measure galaxy–galaxy power spectra from two lens bins centered at z ~ 0.27 and 0.54 and galaxy–mass power spectra by cross-correlating the positions of galaxies in these two lens bins with galaxy shapes in two source bins centered at z ~ 0.64 and 1.1. We marginalize over a baryonic feedback process using a single-parameter representation and a sum of neutrino masses, as well as photometric redshift and shear calibration systematic uncertainties. For a flat ΛCDM cosmology, we determine $${S}_{8}\equiv {\sigma }_{8}\sqrt{{{\rm{\Omega }}}_{m}/0.3}={0.810}_{-0.031}^{+0.039}$$, in good agreement with our previous DLS cosmic shear and the Planck cosmic microwave background (CMB) measurements. Without the baryonic feedback marginalization, S 8 decreases by $$\sim 0.05$$ because the dark-matter-only power spectrum lacks the suppression at the highest ℓ values owing to active galactic nucleus (AGN) feedback. Together with the Planck CMB measurements, we constrain the baryonic feedback parameter to $${A}_{\mathrm{baryon}}={1.07}_{-0.39}^{+0.31}$$, which suggests an interesting possibility that the actual AGN feedback might be stronger than the recipe used in the OverWhelmingly Large cosmological hydrodynamical Simulations. The interpretation is limited by the validity of the baryonic feedback simulation and the one-parameter representation of the effect.

• Research Organization: Univ. of California, Davis, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: SC0009999
• OSTI ID: 1595411
• Journal Information: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 2 Vol. 870; ISSN 1538-4357
• Publisher: Institute of Physics (IOP)Copyright Statement
• Country of Publication: United States
• Language: English