期刊
ASTROPHYSICAL JOURNAL
卷 640, 期 2, 页码 L111-L114出版社
IOP PUBLISHING LTD
DOI: 10.1086/503548
关键词
dark matter; galaxies : halos; galaxies : spiral; galaxies : structure; large-scale structure of universe; methods : statistical
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.
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