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Cosmological parameters from pre-planck cosmic microwave background measurements

Calabrese, Erminia, Hlozek, Renée A., Battaglia, Nick, Battistelli, Elia S., Bond, J. Richard, Chluba, Jens, Crichton, Devin, Das, Sudeep, Devlin, Mark J., Dunkley, Joanna, Dünner, Rolando, Farhang, Marzieh, Gralla, Megan B., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hincks, Adam D., Irwin, Kent D., Kosowsky, Arthur, Louis, Thibaut, Marriage, Tobias A., Moodley, Kavilan, Newburgh, Laura, Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Sehgal, Neelima, Sherwin, Blake D., Sievers, Jonathan L., Sifón, Cristóbal, Spergel, David N., Staggs, Suzanne T., Switzer, Eric R. and Wollack, Edward J. 2013. Cosmological parameters from pre-planck cosmic microwave background measurements. Physical Review D 87 (10) , 103012. 10.1103/PhysRevD.87.103012

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Recent data from the WMAP, ACT and SPT experiments provide precise measurements of the cosmic microwave background temperature power spectrum over a wide range of angular scales. The combination of these observations is well fit by the standard, spatially flat �CDM cosmological model, constraining six free parameters to within a few percent. The scalar spectral index, ns ¼ 0:9690 � 0:0089, is less than unity at the 3:5� level, consistent with simple models of inflation. The damping tail of the power spectrum at high resolution, combined with the amplitude of gravitational lensing measured by ACT and SPT, constrains the effective number of relativistic species to be Neff ¼ 3:28 � 0:40, in agreement with the standard model’s three species of light neutrinos.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: American Physical Society
ISSN: 2470-0010
Date of First Compliant Deposit: 9 October 2017
Date of Acceptance: 12 February 2013
Last Modified: 16 Oct 2017 10:46

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