COMPARISON OF THE COBE DMR AND TENERIFE DATA

被引:28
作者
LINEWEAVER, CH
HANCOCK, S
SMOOT, GF
LASENBY, AN
DAVIES, RD
BANDAY, AJ
DELACRUZ, CMG
WATSON, RA
REBOLO, R
机构
[1] MULLARD RADIO ASTRON OBSERV,CAVEVDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND
[2] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR SPACE SCI,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720
[3] UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND
[4] NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,GREENBELT,MD 20771
[5] INST ASTROFIS CANARIAS,E-38200 LA LAGUNA,SPAIN
关键词
COSMIC MICROWAVE BACKGROUND; COSMOLOGY; OBSERVATIONS; DIFFUSE RADIATION; LARGE-SCALE STRUCTURE OF UNIVERSE;
D O I
10.1086/175978
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have compared the Tenerife data with the COBE Differential Microwave Radiometer (DMR) 2 year data in the declination +40 degrees region of the sky observed by the Tenerife experiment. Using the Galactic plane signal at similar to 30 GHz we show that the two data sets are cross-calibrated to within 5%. The high Galactic latitude data were investigated for the presence of common structures with the properties of cosmic microwave background (CMB) fluctuations. The most prominent feature in the Tenerife data (Delta T similar to 80 mu K) appears to be present in both the 53 and 90 GHz DMR maps and has the Planckian spectrum expected for CMB anisotropy. The cross-correlation function of the Tenerife and DMR scans is indicative of common structure and at zero lag has the value C(0)(1/2) = 34(-15)(+13) mu K. The combination of the spatial and spectral information from the two data sets is consistent with the presence of cosmic microwave background anisotropies common to both. The probability that noise could produce the observed agreement is less than 5%.
引用
收藏
页码:482 / 487
页数:6
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