A high-resolution map of the cosmic microwave background around the north celestial pole

被引：34
作者：
Tegmark, M
deOliveiraCosta, A
Devlin, MJ
Netterfield, CB
Page, L
Wollack, EJ
机构：
[1] MAX PLANCK INST ASTROPHYS,D-85740 GARCHING,GERMANY
[2] INST ADV STUDY,PRINCETON,NJ 08540
[3] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
来源：
ASTROPHYSICAL JOURNAL | 1997年 / 474卷 / 02期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
cosmic microwave background; methods; data analysis;
D O I：
10.1086/310440
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a Wiener-filtered map of the cosmic microwave background (CMB) fluctuations in a cap with 15 degrees diameter, centered at the north celestial pole. The map is based on the 1993-1995 data from the Saskatoon (SK) experiment, with an angular resolution around 1 degrees in the frequency range 27.6-44.1 GHz. The signal-to-noise ratio in the map is of order 2, and some individual hot and cold spots are significant at the 5 sigma level. The spatial features are found to be consistent from year to year, which reinforces the conclusion that the SK results are not dominated by residual atmospheric contamination or other noncelestial signals.
引用
收藏
页码：L77 / L80
页数：4
相关论文
共 18 条
[1]   Four-year COBE DMR cosmic microwave background observations: Maps and basic results [J].
Bennett, CL ;
Banday, AJ ;
Gorski, KM ;
Hinshaw, G ;
Jackson, P ;
Keegstra, P ;
Kogut, A ;
Smoot, GF ;
Wilkinson, DT ;
Wright, EL .
ASTROPHYSICAL JOURNAL, 1996, 464 (01) :L1-&
[2]   SIGNAL-TO-NOISE EIGENMODE ANALYSIS OF THE 2-YEAR COBE MAPS [J].
BOND, JR .
PHYSICAL REVIEW LETTERS, 1995, 74 (22) :4369-4372
[3]   The Wiener-filtered COBE DMR data and predictions for the Tenerife experiment [J].
Bunn, EF ;
Hoffman, Y ;
Silk, J .
ASTROPHYSICAL JOURNAL, 1996, 464 (01) :1-&
[4]   WIENER FILTERING OF THE COBE DIFFERENTIAL MICROWAVE RADIOMETER DATA [J].
BUNN, EF ;
FISHER, KB ;
HOFFMAN, Y ;
LAHAV, O ;
SILK, J ;
ZAROUBI, S .
ASTROPHYSICAL JOURNAL, 1994, 432 (02) :L75-&
[5]  
FISHER KB, 1995, MON NOT R ASTRON SOC, V272, P885
[6]  
HU W, 1996, ASTROPH9604166
[7]   Cosmological-parameter determination with microwave background maps [J].
Jungman, G ;
Kamionkowski, M ;
Kosowsky, A ;
Spergel, DN .
PHYSICAL REVIEW D, 1996, 54 (02) :1332-1344
[8]   WIENER RECONSTRUCTION OF ALL-SKY GALAXY SURVEYS IN SPHERICAL-HARMONICS [J].
LAHAV, O ;
FISHER, KB ;
HOFFMAN, Y ;
SCHARF, CA ;
ZAROUBI, S .
ASTROPHYSICAL JOURNAL, 1994, 423 (02) :L93-L96
[9]   THE ANISOTROPY IN THE COSMIC MICROWAVE BACKGROUND AT DEGREE ANGULAR SCALES [J].
NETTERFIELD, CB ;
JAROSIK, N ;
PAGE, L ;
WILKINSON, D ;
WOLLACK, E .
ASTROPHYSICAL JOURNAL, 1995, 445 (02) :L69-L72
[10]   A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background [J].
Netterfield, CB ;
Devlin, MJ ;
Jarosik, N ;
Page, L ;
Wollack, EJ .
ASTROPHYSICAL JOURNAL, 1997, 474 (01) :47-66
12