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Evidence of lensing of the cosmic microwave background by dark matter halos

Madhavacheril, Mathew, Sehgal, Neelima, Allison, Rupert, Battaglia, Nick, Bond, J. Richard, Calabrese, Erminia, Caligiuri, Jerod, Coughlin, Kevin, Crichton, Devin, Datta, Rahul, Devlin, Mark J., Dunkley, Joanna, Dünner, Rolando, Fogarty, Kevin, Grace, Emily, Hajian, Amir, Hasselfield, Matthew, Hill, J. Colin, Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Hughes, John P., Kosowsky, Arthur, Louis, Thibaut, Lungu, Marius, McMahon, Jeff, Moodley, Kavilan, Munson, Charles, Naess, Sigurd, Nati, Federico, Newburgh, Laura, Niemack, Michael D., Page, Lyman A., Partridge, Bruce, Schmitt, Benjamin, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Thornton, Robert, Van Engelen, Alexander, Ward, Jonathan T. and Wollack, Edward J. 2015. Evidence of lensing of the cosmic microwave background by dark matter halos. Physical Review Letters 114 (15) , 151302. 10.1103/PhysRevLett.114.151302

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Abstract

We present evidence of the gravitational lensing of the cosmic microwave background by 1013 solar mass dark matter halos. Lensing convergence maps from the Atacama Cosmology Telescope Polarimeter (ACTPol) are stacked at the positions of around 12 000 optically selected CMASS galaxies from the SDSS-III/BOSS survey. The mean lensing signal is consistent with simulated dark matter halo profiles and is favored over a null signal at 3.2σ significance. This result demonstrates the potential of microwave background lensing to probe the dark matter distribution in galaxy group and galaxy cluster halos.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Physical Society
ISSN: 00319007
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 13 February 2015
Last Modified: 07 Sep 2017 09:44
URI: http://orca-mwe.cf.ac.uk/id/eprint/104425

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