The cosmic microwave background anisotropy power spectrum from the BEAST experiment

被引：13

作者：

O'Dwyer, IJ

Bersanelli, M

Childers, J

Figueiredo, N

Halevi, D

Huey, G

Lubin, PM

Maino, D

Mandolesi, N

Marvil, J

Meinhold, PR

Mejía, J

Natoli, P

O'Neill, H

Pina, A

Seiffert, MD

Stebor, NC

Tello, C

Villela, T

Wandelt, BD

Williams, B

Wuensche, CA

机构：

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

[2] Univ Milan, Dept Phys, I-20133 Milan, Italy

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

[4] Univ Fed Itajuba, Dept Quim & Fis, BR-50375009 Itajuba, MG, Brazil

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

[6] Univ Calif, White Mt Res Stn, CA 93514 USA

[7] CNR, IASF, Sez Bologna, I-40129 Bologna, Italy

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

[9] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy

[10] Univ Roma Tor Vergata, Sez INFN, I-00173 Rome, Italy

[11] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2005年 / 158卷 / 01期

关键词：

cosmic microwave background; cosmology : observations; large-scale structure of universe;

D O I：

10.1086/429089

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Background Emission Anisotropy Scanning Telescope (BEAST) is a 2.2 m off-axis telescope with an eight-element mixed Q-band (38-45 GHz) and Ka-band (26-36 GHz) focal plane, designed for balloon-borne and ground-based studies of the cosmic microwave background (CMB). Here we present the CMB angular power spectrum calculated from 682 hr of data observed with the BEAST instrument. We use a binned pseudo-C-l estimator (the MASTER method). We find results that are consistent with other determinations of the CMB anisotropy for angular wavenumbers l between 100 and 600. We also perform cosmological parameter estimation. The BEAST data alone produce a good constraint on Omega(k) = 1 - Omega(tot) = 0.074 +/- 0.070, consistent with a flat universe. A joint parameter estimation analysis with a number of previous CMB experiments produces results consistent with previous determinations.

引用

页码：93 / 100

页数：8

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