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

Mijin Yoon, M. James Jee, J. Anthony Tyson, Samuel Schmidt, David Wittman, Ami Choi

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4 Citations (Scopus)


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 , 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 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 , 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.

Original languageEnglish
Article number111
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 2019 Jan 10

Bibliographical note

Funding Information:
We thank the anonymous referee for his/her constructive suggestions for improving the quality of the paper. We also thank Kyle Finner and Cris Sabiu for their careful reading of the manuscript and providing useful comments. M. J. Jee acknowledges support for the current research from the National Research Foundation of Korea under program nos. 2017R1A2B2004644 and 2017R1A4A1015178. M. Yoon acknowledges support from the Yonsei University Observatory–KASI Joint Research Program (2018). J. A. Tyson and S. Schmidt acknowledge partial support from DOE grant DE-SC0009999 and NSF/ AURA grant N56981C.

Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved..

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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