Detection of the Effect of Cosmological Large-Scale Structure on the Orientation of Galaxies

Bibcode
2006ApJ...640L.111T
DOI
10.1086/503548
Trujillo, I.; Carretero, Conrado; Patiri, Santiago G.
Bibliographical reference

The Astrophysical Journal, Volume 640, Issue 2, pp. L111-L114.

Advertised on:
4
2006
Journal
The Astrophysical Journal
Number of authors
3
IAC number of authors
2
Citations
110
Refereed citations
99
Description
Galaxies are not distributed randomly throughout space but are instead arranged in an intricate ``cosmic web'' of filaments and walls surrounding bubble-like voids. There is still no compelling observational evidence of a link between the structure of the cosmic web and how galaxies form within it. However, such a connection is expected on the basis of our understanding of the origin of galaxy angular momentum: disk galaxies should be highly inclined relative to the plane defined by the large-scale structure surrounding them. Using the two largest galaxy redshift surveys currently in existence (2dFGRS and SDSS), we show at the 99.7% confidence level that these alignments do indeed exist: spiral galaxies located on the shells of the largest cosmic voids have rotation axes that lie preferentially on the void surface.
Type
Refereed
Cosmology
Dark matter
Galaxies
Methods

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