Atacama Cosmology Telescope: Constraints on cosmic birefringence

Atacama Cosmology Telescope: Constraints on cosmic birefringence
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DOI：
10.1103/physrevd.101.083527
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发表时间：
2020-01
期刊：
Physical Review D
影响因子：
5
通讯作者：
T. Namikawa;Yilun Guan;O. Darwish;B. Sherwin;S. Aiola;N. Battaglia;J. Beall;D. Becker;J. Bond;E. Calabrese;G. Chesmore;Steve K. Choi;C. Sif'on;M. Devlin;J. Dunkley;R. Dunner;A. Fox;P. Gallardo;V. Gluscevic;Dongwon Han;M. Hasselfield;G. Hilton;A. Hincks;R. Hlovzek;J. Hubmayr;K. Huffenberger;J. Hughes;B. Koopman;A. Kosowsky;T. Louis;M. Lungu;Amanda Macinnis;M. Madhavacheril;M. Mallaby-Kay;L. Maurin;J. McMahon;K. Moodley;S. Naess;F. Nati;L. Newburgh;J. Nibarger;M. Niemack;L. Page;F. J. Qu;N. Robertson;A. Schillaci;N. Sehgal;S. Simon;D. Spergel;S. Staggs;E. Storer;A. V. Engelen;J. Lanen;Edward J. Wollack
T. Namikawa;Yilun Guan;O. Darwish;B. Sherwin;S. Aiola;N. Battaglia;J. Beall;D. Becker;J. Bond;E. Calabrese;G. Chesmore;Steve K. Choi;C. Sif'on;M. Devlin;J. Dunkley;R. Dunner;A. Fox;P. Gallardo;V. Gluscevic;Dongwon Han;M. Hasselfield;G. Hilton;A. Hincks;R. Hlovzek;J. Hubmayr;K. Huffenberger;J. Hughes;B. Koopman;A. Kosowsky;T. Louis;M. Lungu;Amanda Macinnis;M. Madhavacheril;M. Mallaby-Kay;L. Maurin;J. McMahon;K. Moodley;S. Naess;F. Nati;L. Newburgh;J. Nibarger;M. Niemack;L. Page;F. J. Qu;N. Robertson;A. Schillaci;N. Sehgal;S. Simon;D. Spergel;S. Staggs;E. Storer;A. V. Engelen;J. Lanen;Edward J. Wollack
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
T. Namikawa;Yilun Guan;O. Darwish;B. Sherwin;S. Aiola;N. Battaglia;J. Beall;D. Becker;J. Bond;E. Calabrese;G. Chesmore;Steve K. Choi;C. Sif'on;M. Devlin;J. Dunkley;R. Dunner;A. Fox;P. Gallardo;V. Gluscevic;Dongwon Han;M. Hasselfield;G. Hilton;A. Hincks;R. Hlovzek;J. Hubmayr;K. Huffenberger;J. Hughes;B. Koopman;A. Kosowsky;T. Louis;M. Lungu;Amanda Macinnis;M. Madhavacheril;M. Mallaby-Kay;L. Maurin;J. McMahon;K. Moodley;S. Naess;F. Nati;L. Newburgh;J. Nibarger;M. Niemack;L. Page;F. J. Qu;N. Robertson;A. Schillaci;N. Sehgal;S. Simon;D. Spergel;S. Staggs;E. Storer;A. V. Engelen;J. Lanen;Edward J. Wollack

文献摘要

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我们利用阿塔卡马宇宙学望远镜覆盖456平方度天空的两个季节的数据，对宇宙微波背景极化的各向异性双折射提出了新的限制条件。使用曲面天空二次估计器测量的双折射功率谱与零一致。我们的结果在5角分至9°的角度范围内提供了对双折射最严格的电流约束。我们将以前关于标度不变双折射功率谱振幅的上限改进了2到3倍。在膨胀过程中，假设轴子场几乎为零质量，我们的结果相当于g_(σ)&lt；4.0×10~(αγ)/H_i的轴子和光子的Chern-Simons耦合常数的2⁻上限，其中HI是膨胀的哈勃标度。
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) < 4.0×10⁻²/H_I, where HI is the inflationary Hubble scale.