First measurement of the cross-correlation of CMB lensing and galaxy lensing

Nick Hand, Alexie Leauthaud, Sudeep Das, Blake D. Sherwin, Graeme E. Addison, J. Richard Bond, Erminia Calabrese, Aldée Charbonnier, Mark J. Devlin, Joanna Dunkley, Thomas Erben, Amir Hajian, Mark Halpern, Joachim Harnois-Déraps, Catherine Heymans, Hendrik Hildebrandt, Adam D. Hincks, Jean Paul Kneib, Arthur Kosowsky, Martin MaklerLance Miller, Kavilan Moodley, Bruno Moraes, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Neelima Sehgal, Huanyuan Shan, Jonathan L. Sievers, David N. Spergel, Suzanne T. Staggs, Eric R. Switzer, James E. Taylor, Ludovic Van Waerbeke, Charlotte Welker, Edward J. Wollack

Research output: Contribution to journalArticle

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Abstract

We measure the cross-correlation of cosmic microwave background (CMB) lensing convergence maps derived from Atacama Cosmology Telescope data with galaxy lensing convergence maps as measured by the Canada-France-Hawaii Telescope Stripe 82 Survey. The CMB-galaxy lensing cross power spectrum is measured for the first time with a significance of 4.2σ, which corresponds to a 12% constraint on the amplitude of density fluctuations at redshifts ∼0.9. With upcoming improved lensing data, this novel type of measurement will become a powerful cosmological probe, providing a precise measurement of the mass distribution at intermediate redshifts and serving as a calibrator for systematic biases in weak lensing measurements.

Original languageEnglish (US)
Article number062001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number6
DOIs
StatePublished - Mar 2 2015

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Hand, N., Leauthaud, A., Das, S., Sherwin, B. D., Addison, G. E., Bond, J. R., Calabrese, E., Charbonnier, A., Devlin, M. J., Dunkley, J., Erben, T., Hajian, A., Halpern, M., Harnois-Déraps, J., Heymans, C., Hildebrandt, H., Hincks, A. D., Kneib, J. P., Kosowsky, A., ... Wollack, E. J. (2015). First measurement of the cross-correlation of CMB lensing and galaxy lensing. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(6), [062001]. https://doi.org/10.1103/PhysRevD.91.062001