Alignments of the Dominant Galaxies in Poor Clusters | Zendy

Todd M. Fuller | Zendy; Michael J. West | Zendy; Terry Bridges | Zendy

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Alignments of the Dominant Galaxies in Poor Clusters

Author(s) -

Todd M. Fuller,

Michael J. West,

Terry Bridges

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/307343

Subject(s) - physics , galaxy cluster , astrophysics , cluster (spacecraft) , galaxy groups and clusters , galaxy , brightest cluster galaxy , astronomy , computer science , programming language

We have examined the orientations of brightest cluster galaxies (BCGs) inpoor MKW and AWM clusters and find that, like their counterparts in richerAbell clusters, poor cluster BCGs exhibit a strong propensity to be alignedwith the principal axes of their host clusters as well as the surroundingdistribution of nearby (< 20/h Mpc) Abell clusters. The processes responsiblefor dominant galaxy alignments are therefore independent of cluster richness.We argue that these alignments most likely arise from anisotropic infall ofmaterial into clusters along large-scale filaments.Comment: 8 pages, 5 figure

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