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

We present evidence of the gravitational lensing of the cosmic microwave background by 10(13) 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...

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Bibliographic Details
Published in:Physical review letters 2015-04, Vol.114 (15), p.151302-151302, Article 151302
Main Authors: 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, Wollack, Edward J
Format: Article
Language:English
Subjects:
Convergence
Cosmic microwave background
Cosmology
Dark matter
Galactic halos
Galaxies
Microwaves
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Summary:We present evidence of the gravitational lensing of the cosmic microwave background by 10(13) 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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.114.151302