Details

Autor(en) / Beteiligte

• Namikawa, Toshiya
• Guan, Yilun
• Darwish, Omar
• Sherwin, Blake D.
• Aiola, Simone
• Battaglia, Nicholas
• Beall, James A.
• Becker, Daniel T.
• Bond, J. Richard
• Calabrese, Erminia
• Chesmore, Grace E.
• K.Choi, Steve
• Devlin, Mark J.
• Dunkley, Joanna
• Dunner, Rolando
• Fox, Anna E.
• Gallardo, Patricio A.
• Gluscevic, Vera
• Han, Dongwon
• Hasselfield, Matthew
• Hilton, Gene C.
• Hincks, Adam D.
• Hlozek, Renee
• Hubmayr, Johannes
• Huffenberger, Kevin
• Hughes, John P.
• Koopman, Brian J.
• Kosowsky, Arthur
• Louis, Thibaut
• Lungu, Marius
• MacInnis, Amanda
• Madhavacheril, Mathew S.
• Mallaby-Kay, Maya
• Maurin, Loıc
• McMahon, Jeffrey
• Moodley, Kavilan
• Naess, Sigurd
• Nati, Federico
• B.Newburgh, Laura
• Nibarger, John P.
• Niemack, Michael D.
• Page, Lyman A.
• Qu, Frank J.
• Robertson, Naomi
• Schillaci, Alessandro
• Sehgal, Neelima
• Sifon, Cristobal
• Simon, Sara M.
• Spergel, David N.
• T.Staggs, Suzanne
• Storer, Emilie R.
• Engelen, Alexander van
• Lanen, Jeff van
• Wollack, Edward J.

Titel

The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence

Ist Teil von

• Physical review. D, 2020-04, Vol.101 (8), Article 083527

Ort / Verlag

Goddard Space Flight Center: American Physical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present new constraints on anisotropic birefringence of the cosmic microwave background polarization using two seasons of data from the Atacama Cosmology Telescope covering 456 square degrees of sky. The birefringence power spectrum, measured using a curved-sky quadratic estimator, is consistent with zero. Our results provide the tightest current constraint on birefringence over a range of angular scales between 5 arc minutes and 9°. We improve previous upper limits on the amplitude of a scale-invariant birefringence power spectrum by a factor of between 2 and 3. Assuming a nearly massless axion field during inflation, our result is equivalent to a 2σ upper limit on the Chern-Simons coupling constant between axions and photons of g(αγ)< 4.0 × 10(exp -2)/H(I), where H(I) is the inflationary Hubble scale.