On the Origin of the Local Group’s Peculiar Velocity

@article{Kocevski2006OnTO,
  title={On the Origin of the Local Group’s Peculiar Velocity},
  author={Dale D. Kocevski and Harald Ebeling},
  journal={The Astrophysical Journal},
  year={2006},
  volume={645},
  pages={1043 - 1053}
}
We aim to settle the debate regarding the fraction of the Local Group's peculiar velocity that is induced by structures beyond the Great Attractor by calculating the dipole anisotropy of the largest, all-sky, truly X-ray-selected cluster sample compiled to date. The sample is the combination of the REFLEX catalog in the southern hemisphere, the eBCS sample in the north, and the CIZA survey in the Galactic plane. The composite REFLEX+eBCS+CIZA sample overcomes many of the problems inherent to… 

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References

SHOWING 1-10 OF 60 REFERENCES

The Dipole Anisotropy of the First All-Sky X-Ray Cluster Sample

We combine the recently published CIZA (clusters in the zone of avoidance) galaxy cluster catalog with the XBAC (X-ray-brightest Abell-type cluster) sample to produce the first all-sky catalog of

The supergalactic plane redshift survey - A candidate for the great attractor

Redshift measurements, nearly 600 of which are new, are compiled for about 900 galaxies in a survey toward the apex of the large-scale streaming flow for ellipticals. The velocity histogram shows

Seeking the Local Convergence Depth: The Abell Cluster Dipole Flow to 200 h–1 Mpc

We have obtained new Tully-Fisher (TF) peculiar velocity measurements for 52 Abell galaxy clusters distributed throughout the sky between ~50 and 200 h-1 Mpc. The measurements are based on I-band

A Large-scale Bulk Flow of Galaxy Clusters

We report first results from the Streaming Motions of Abell Clusters (SMAC) project, an all-sky Fundamental Plane survey of 699 early-type galaxies in 56 clusters between ~3000 and ~14,000 km s-1.

Likelihood analysis of the Local Group acceleration

We compute the acceleration on the Local Group using 11206 IRAS galaxies from the recently completed all-sky PSCz redshift survey. Measuring the acceleration vector in redshift space generates

A nearby massive galaxy cluster behind the Milky Way

THE recession velocities of relatively nearby galaxies show systematic deviations from a uniform expansion field. These deviations indicate the presence of the 'Great Attractor'—a large concentration

The peculiar motions of early-type galaxies in two distant regions — VII. Peculiar velocities and bulk motions

We present peculiar velocities for 85 clusters of galaxies in two large volumes at distances between 6000 and 15 000 km s−1 in the directions of Hercules–Corona Borealis and Perseus–Pisces–Cetus (the

Density and velocity fields from the PSCz survey

We present the results for the predicted density and peculiar velocity fields and the dipole from the PSCz survey of 15,000 IRAS galaxies over 84% of the sky. We find a significant component to the

No Hubble Bubble in the Local Universe

Zehavi et al. have suggested that the Hubble flow within 70 h-1 Mpc may be accelerated by the existence of a void centered on the Local Group. Its underdensity would be ~20%, which would result in a

The peculiar velocity field in the local supercluster

A general method of estimating the peculiar velocity field expected, under the gravitational instability picture, around the outer parts of a mass concentration like a cluster of galaxies is derived
...