The Cosmology Large Angular Scale Surveyor

被引：60

作者：

Harrington, Kathleen ^{[1
]}

Marriage, Tobias ^{[1
]}

Ali, Aamir ^{[1
]}

Appel, John W. ^{[1
]}

Bennett, Charles L. ^{[1
]}

Boone, Fletcher ^{[5
]}

Brewer, Michael ^{[1
]}

Chan, Manwei ^{[1
]}

Chuss, David T. ^{[4
]}

Colazo, Felipe ^{[3
]}

Dahal, Sumit ^{[1
]}

Denis, Kevin ^{[3
]}

Dunner, Rolando ^{[6
,7
]}

Eimer, Joseph ^{[1
]}

Essinger-Hileman, Thomas ^{[1
]}

Fluxa, Pedro ^{[6
,7
]}

Halpern, Mark ^{[2
]}

Hilton, Gene ^{[8
]}

Hinshaw, Gary F. ^{[2
]}

Hubmayr, Johannes ^{[8
]}

Iuliano, Jeffery ^{[1
]}

Karakla, John ^{[1
]}

McMahon, Jeff ^{[5
]}

Miller, Nathan T. ^{[1
,3
]}

Moseley, Samuel H. ^{[3
]}

Palma, Gonzalo ^{[10
]}

Parker, Lucas ^{[1
]}

Petroff, Matthew ^{[1
]}

Pradenas, Bastian ^{[10
]}

Rostem, Karwan ^{[1
,3
]}

Sagliocca, Marco ^{[4
]}

Valle, Deniz ^{[1
]}

Watts, Duncan ^{[1
]}

Wollack, Edward ^{[3
]}

Xu, Zhilei ^{[1
]}

Zeng, Lingzhen ^{[9
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada

[3] NASA, Goddard Space Flight Ctr, Code 660, Greenbelt, MD 20771 USA

[4] Villanova Univ, Dept Phys, Villanova, PA 19085 USA

[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[6] Pontificia Univ Catolica Chile, Inst Astrofis, Fac Fis, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile

[7] Pontificia Univ Catolica Chile, Ctr Astroingn, Fac Fis, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile

[8] Natl Inst Stand & Technol, 325 Broadway, Boulder, CO 80305 USA

[9] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[10] Univ Chile, Dept Phys, FCFM, Blanco Encalada 2008, Santiago, Chile

来源：

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VIII | 2016年 / 9914卷

关键词：

PROBE WMAP OBSERVATIONS; B-MODE POLARIZATION; INFLATIONARY UNIVERSE; MICROWAVE; FLATNESS; HORIZON;

D O I：

10.1117/12.2233125

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Cosmology Large Angular Scale Surveyor (CLASS) is a four telescope array designed to characterize relic primordial gravitational waves from inflation and the optical depth to reionization through a measurement of the polarized cosmic microwave background (CMB) on the largest angular scales. The frequencies of the four CLASS telescopes, one at 38 GHz, two at 93 GHz, and one dichroic system at 145/217 GHz, are chosen to avoid spectral regions of high atmospheric emission and span the minimum of the polarized Galactic foregrounds: synchrotron emission at lower frequencies and dust emission at higher frequencies. Low-noise transition edge sensor detectors and a rapid front-end polarization modulator provide a unique combination of high sensitivity, stability, and control of systematics. The CLASS site, at 5200 m in the Chilean Atacama desert, allows for daily mapping of up to 70% of the sky and enables the characterization of CMB polarization at the largest angular scales. Using this combination of a broad frequency range, large sky coverage, control over systematics, and high sensitivity, CLASS will observe the reionization and recombination peaks of the CMB E- and B-mode power spectra. CLASS will make a cosmic variance limited measurement of the optical depth to reionization and will measure or place upper limits on the tensor-to-scalar ratio, r, down to a level of 0.01 (95% C.L.).

引用

页数：21

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