Angular power spectrum of the FASTICA cosmic microwave background component from Background Emission Anisotropy Scanning Telescope data

被引：7

作者：

Donzelli, S

Maino, D

Bersanelli, M

Childers, J

Figueiredo, N

Lubin, PM

Meinhold, PR

O'Dwyer, IJ

Seiffert, MD

Villela, T

Wandelt, BD

Wuensche, CA

机构：

[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] SISSA, ISAS, Astrophys Sector, I-34014 Trieste, Italy

[3] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[4] Univ Fed Itajuba, Dept Quim & Fis, BR-37500903 Itajuba, MG, Brazil

[5] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[6] Jet Propuls Lab, Pasadena, CA 91109 USA

[7] Inst Nacl Pesquisas Espaciais, Div Astrofis, BR-12245970 Sao Jose Dos Campos, SP, Brazil

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2006年 / 369卷 / 01期

关键词：

methods : data analysis; techniques : image processing; cosmic microwave background;

D O I：

10.1111/j.1365-2966.2006.10320.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the angular power spectrum of the cosmic microwave background (CMB) component extracted with FASTICA from the Background Emission Anisotropy Scanning Telescope (BEAST) data. BEAST is a 2.2-m off-axis telescope with a focal plane comprising eight elements at Q (38-45 GHz) and Ka (26-36 GHz) bands. It operates from the UC (University of California) White Mountain Research Station at an altitude of 3800 m. The BEAST CMB angular power spectrum has already been calculated by O'Dwyer et al. using only the Q-band data. With two input channels, FASTICA returns two possible independent components. We found that one of these two has an unphysical spectral behaviour, while the other is a reasonable CMB component. After a detailed calibration procedure based on Monte Carlo (MC) simulations, we extracted the angular power spectrum for the identified CMB component and found a very good agreement with the already published BEAST CMB angular power spectrum and with the Wilkinson Microwave Anisotropy Probe (WMAP) data.

引用

页码：441 / 448

页数：8

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