Open AccessSpatial orientations of galaxies in seven Abell clusters of BM type II
Author(s) -
Aryal B.,
Paudel S.,
Saurer W.
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2007.11874.x
Subject(s) - physics , astrophysics , abell 2744 , astronomy , galaxy , galaxy cluster , brightest cluster galaxy , galaxy group , galaxy groups and clusters , disc galaxy , lenticular galaxy , radio galaxy , elliptical galaxy
As a concluding paper in this series, we present an analysis of the spatial orientations of galaxies in seven Abell clusters of BM type II and compare the results with previous works. Four BM type II clusters (A1767, A1809, A2554, A2721) show a similar preferred alignment: spin vectors of galaxies tend to lie in the local supercluster plane and the projections of the spin vector tend to be oriented perpendicular with respect to the Virgo cluster centre. A preferred alignment of galaxies in cluster A2554 is noticed in both the two‐ and three‐dimensional analyses. In a comparison with previous work, we noticed a systematic change (with distance, radial velocity, morphology and magnitude) in the galaxy alignments from early‐type (BM I) to late‐type (BM III) clusters. Possible explanations of these systematic changes will be discussed.