The Atacama Cosmology Telescope: Galactic Dust Structure and the Cosmic PAH Background in Cross-correlation with WISE

被引:1
作者
Rosado, Rodrigo Cordova [1 ]
Hensley, Brandon S. [1 ]
Clark, Susan E. [2 ,3 ]
Duivenvoorden, Adriaan J. [4 ]
Atkins, Zachary [5 ]
Battistelli, Elia Stefano [6 ]
Choi, Steve K. [7 ,8 ]
Dunkley, Jo [1 ,5 ]
Hervias-Caimapo, Carlos [9 ,10 ]
Li, Zack [11 ]
Louis, Thibaut [12 ]
Naess, Sigurd [13 ]
Page, Lyman A. [5 ]
Partridge, Bruce [14 ]
Sifon, Cristobal [15 ]
Staggs, Suzanne T. [5 ]
Vargas, Cristian [9 ,10 ]
Wollack, Edward J. [16 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Peyton Hall,4 Ivy Lane, Princeton, NJ 08544 USA
[2] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[3] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
[4] Flatiron Inst, Ctr Computat Astrophys, 162 5th Ave, New York, NY 10010 USA
[5] Princeton Univ, Joseph Henry Labs Phys, Jadwin Hall, Princeton, NJ 08544 USA
[6] Sapienza Univ Rome, Phys Dept, Piazzale Aldo Moro 5, I-00185 Rome, Italy
[7] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA
[8] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[9] Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile
[10] Pontificia Univ Catolica Chile, Fac Fis, Ctr Astro Ingn, Av Vicuna Mackenna 4860, Santiago 7820436, Chile
[11] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada
[12] Univ Paris Saclay, CNRS, IJCLab, IN2P3, F-91405 Orsay, France
[13] Univ Oslo, Inst Theoret Astrophys, Oslo, Norway
[14] Haverford Coll, Dept Phys & Astron, Haverford, PA 19041 USA
[15] Pontificia Univ Catolica Valparaiso, Inst Fis, Casilla 4059, Valparaiso, Chile
[16] Goddard Space Flight Ctr, NASA, Greenbelt, MD 20771 USA
基金
美国国家科学基金会; 加拿大创新基金会;
关键词
STATISTICAL PROPERTIES; INTERSTELLAR DUST; NEUTRAL HYDROGEN; FULL-SKY; MAGNETIC-FIELD; POWER SPECTRUM; EMISSION; POLARIZATION; CIRRUS; RESOLUTION;
D O I
10.3847/1538-4357/ad05cd
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a cross-correlation analysis between 1 ' resolution total intensity and polarization observations from the Atacama Cosmology Telescope (ACT) at 150 and 220 GHz and 15'' mid-infrared photometry from the Wide-field Infrared Survey Explorer (WISE) over 107 12(degrees)5 x 12(degrees)5 patches of sky. We detect a spatially isotropic signal in the WISExACT TT cross-power spectrum at 30 sigma significance that we interpret as the correlation between the cosmic infrared background at ACT frequencies and polycyclic aromatic hydrocarbon (PAH) emission from galaxies in WISE, i.e., the cosmic PAH background. Within the Milky Way, the Galactic dust TT spectra are generally well described by power laws in & ell; over the range 10(3) < l < 10(4), but there is evidence both for variability in the power-law index and for non-power-law behavior in some regions. We measure a positive correlation between WISE total intensity and ACT E-mode polarization at 1000 < l less than or similar to 6000 at >3 sigma in each of 35 distinct similar to 100 deg(2) regions of the sky, suggesting that alignment between Galactic density structures and the local magnetic field persists to subparsec physical scales in these regions. The distribution of TE amplitudes in this l range across all 107 regions is biased to positive values, while there is no evidence for such a bias in the TB spectra. This work constitutes the highest-& ell; measurements of the Galactic dust TE spectrum to date and indicates that cross-correlation with high-resolution mid-infrared measurements of dust emission is a promising tool for constraining the spatial statistics of dust emission at millimeter wavelengths.
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页数:15
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