# The dipole observed in the {ital COBE} DMR 4 year data

@article{Lineweaver1996TheDO,
title={The dipole observed in the \{ital COBE\} DMR 4 year data},
author={C. Lineweaver and L. Tenorio and G. Smoot and P. Keegstra and A. J. B. Lubin},
journal={The Astrophysical Journal},
year={1996},
volume={470}
}
The largest anisotropy in the cosmic microwave background (CMB) is the {approx_equal}3 mK dipole assumed to be due to our velocity with respect to the CMB. Using the 4 year data set from all six channels of the {ital COBE} Differential Microwave Radiometers (DMR), we obtain a best-fit dipole amplitude 3.358{plus_minus}0.001{plus_minus}0.023 mK in the direction ({ital l},{ital b})=(264.31{degrees}{plus_minus}0.04{degree}{plus_minus}0.16{degree} +48.05{degrees}{plus_minus}0.02{degree}{plus_minus… Expand
102 Citations

#### Figures and Tables from this paper

Anisotropy of the Universe via the Pantheon supernovae sample revisited
• Physics
• 2019
We employ the hemisphere comparison (HC) method and the dipole fitting (DF) method to investigate the cosmic anisotropy in the recently released Pantheon sample of type Ia supernovae (SNe Ia) andExpand
Limits on the transverse velocity of the lensing galaxy in Q2237+0305 from the lack of strong microlensing variability
• Physics
• 2005
We present a method for the determination of upper limits on the transverse velocity of the lensing galaxy in the quadruple quasar system Q2237+0305, based on the lack of strong microlensingExpand
Searching for cosmological preferred axis using cosmographic approach
• Physics
• 2016
Recent released Planck data and other astronomical observations show that the universe may be anisotropic on large scales. This hints a cosmological privileged axis in our anisotropic expandingExpand
Peculiar Velocity Effects on the CMB
The aberration effect due to our peculiar velocity $$\boldsymbol{\beta }$$ with respect to the CMB induces mixing among multipoles and off-diagonal correlations at all scales which can be used as aExpand
Are Type Ia supernova powerful tool to detect anisotropic expansion of the Universe?
• Physics
• 2020
In this paper, we present a detailed analysis of the dark energy dipole using Union2, Pantheon and GRB dataset in Chameleon and Teleparallel dark energy models, in comparison with $$\Lambda$$CDM.Expand
Probing the anisotropic expansion from supernovae and GRBs in a model-independent way
• Physics
• 2014
In this paper, we study the anisotropic expansion of the universe using type Ia supernovae Union 2.1 sample and 116 long gamma-ray bursts. The luminosity distance is expanded with model-independentExpand
Cosmic background dipole measurements with the Planck-High Frequency Instrument
• Physics
• 2002
This paper discusses the Cosmic Background (CB) dipole observations in the framework of the Planck mission. Dipole observations can be used in three ways: (i) It gives a measurement of the peculiarExpand
Study of the X-Ray Background Spectrum and its Large-Scale Fluctuation with ASCA
We studied the energy spectrum and the large-scale fluctuation of the X-ray background with the ASCA GIS based on the ASCA MSS and LSS observations. A total of 91 fields with Galactic latitude |b|>10Expand
Measuring our peculiar velocity on the CMB with high-multipole off-diagonal correlations
• Physics
• 2011
Our peculiar velocity with respect to the CMB rest frame is known to induce a large dipole in the CMB. However, the motion of an observer has also the effect of distorting the anisotropies at allExpand
The significance of anisotropic signals hiding in the Type Ia supernovae
• Physics
• 2016
We use two different methods, i.e. dipole-fitting (DF) and hemisphere comparison (HC), to search for the anisotropic signals hiding in the Union2.1 data set. We find that the directions of maximumExpand

#### References

SHOWING 1-2 OF 2 REFERENCES
1996a, Ap.J
• Ap.J
• 1993
This preprint was prepared with the AAS L A T E X macros v3
• This preprint was prepared with the AAS L A T E X macros v3