DIPOLE ANISOTROPY IN THE COBE DIFFERENTIAL MICROWAVE RADIOMETERS 1ST-YEAR SKY MAPS

被引：348

作者：

KOGUT, A

LINEWEAVER, C

SMOOT, GF

BENNETT, CL

BANDAY, A

BOGGESS, NW

CHENG, ES

DEAMICI, G

FIXSEN, DJ

HINSHAW, G

JACKSON, PD

JANSSEN, M

KEEGSTRA, P

LOEWENSTEIN, K

LUBIN, P

MATHER, JC

TENORIO, L

WEISS, R

WILKINSON, DT

WRIGHT, EL

机构：

[1] NASA, GSFC, APPL RES CORP, GREENBELT, MD 20771 USA

[2] NASA, GSFC, HUGHES STX CORP, GREENBELT, MD 20771 USA

[3] UCSB, DEPT PHYS, SANTA BARBARA, CA 93106 USA

[4] UNIV CALIF LOS ANGELES, DEPT ASTRON, LOS ANGELES, CA 90024 USA

[5] PRINCETON UNIV, DEPT PHYS, PRINCETON, NJ 08544 USA

[6] LAWRENCE BERKELEY LAB, SPACE SCI LAB, BERKELEY, CA 94720 USA

[7] UNIV CALIF BERKELEY, CTR PARTICLE ASTROPHYS, BERKELEY, CA 94720 USA

[8] JET PROP LAB, PASADENA, CA 91109 USA

[9] MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 419卷 / 01期

关键词：

COSMIC MICROWAVE BACKGROUND; COSMOLOGY; OBSERVATIONS;

D O I：

10.1086/173453

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a determination of the cosmic microwave background dipole amplitude and direction from the COBE Differential Microwave Radiometers (DMR) first year of data. Data from the six DMR channels are consistent with a Doppler-shifted Planck function of dipole amplitude DELTAT = 3.365 +/- 0.027 mK toward direction (l(II), b(II)) = (264.4-degrees +/- 0.3-degrees, 48.4-degrees +/- 0.5-degrees). The implied velocity of the Local Group with respect to the CMB rest frame is v(LG) = 627 +/- 22 km s-1 toward (l(II), b(II)) = (276-degrees +/- 3-degrees, 30-degrees +/- 3-degrees). DMR has also mapped the dipole anisotropy resulting from the Earth's orbital motion about the Solar system barycenter, yielding a measurement of the monopole CMB temperature T0 at 31.5, 53, and 90 GHz, T0 = 2.75 +/- 0.05 K.

引用

页码：1 / 6

页数：6

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