Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-09-06
Astronomy and Astrophysics
Astrophysics
Contribution to ``Cosmic Flows. Towards an Understanding of Large-Scale Structure'', Workshop Victoria B.C., July 1999, eds. S
Scientific paper
Unlike the substantial coherent bulk motion in which our local patch of the Cosmos is participating, the amplitude of the random motions around this large scale flow seems to be surprisingly low. Attempts to invoke global explanations to account for this coldness of the local cosmic velocity field have not yet been succesfull. Here we propose a different view on this cosmic dilemma, stressing the repercussions of our cosmic neighbourhood embodying a rather uncharacteristic region of the Cosmos. Suspended between two huge mass concentrations, the Great Attractor region and the Perseus-Pisces chain, we find ourselves in a region of relatively low density yet with a very strong tidal shear. By means of constrained realizations of our local Universe, based on Wiener-filtered reconstructions inferred from the Mark III catalogue of galaxy peculiar velocities, we show that indeed this configuration may induce locally cold regions. Hence, the coldness of the local flow may be a cosmic variance effect.
de Weygaert Rien van
Hoffman Yehuda
No associations
LandOfFree
The Structure of the Local Universe and the Coldness of the Cosmic Flow does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Structure of the Local Universe and the Coldness of the Cosmic Flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Structure of the Local Universe and the Coldness of the Cosmic Flow will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-584143