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

Mathew Madhavacheril, Neelima Sehgal, Rupert Allison, Nick Battaglia, J. Richard Bond, Erminia Calabrese, Jerod Caligiuri, Kevin Coughlin, Devin Crichton, Rahul Datta, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Kevin Fogarty, Emily Grace, Amir Hajian, Matthew Hasselfield, J. Colin Hill, Matt Hilton, Adam D. HincksRenée Hlozek, John P. Hughes, Arthur Kosowsky, Thibaut Louis, Marius Lungu, Jeff McMahon, Kavilan Moodley, Charles Munson, Sigurd Naess, Federico Nati, Laura Newburgh, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Benjamin Schmitt, Blake D. Sherwin, Jon Sievers, David N. Spergel, Suzanne T. Staggs, Robert Thornton, Alexander Van Engelen, Jonathan T. Ward, Edward J. Wollack

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


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 12000 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.

Original languageEnglish (US)
Article number151302
JournalPhysical review letters
Issue number15
StatePublished - Apr 13 2015

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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