Pedbost 2009 哈哈, galaxy zoo on April 1st

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文章信息:

arXiv:0903.5377 [ps, pdf, other]

Title: Galaxy Zoo: an unusual new class of galaxy cluster

Authors: Marven F. Pedbost, Trillean Pomalgu, the Galaxy Zoo team

Comments: 4 pages, 3 figures

Subjects: Cosmology and Extragalactic Astrophysics (astro-ph.CO)

We have identified a new class of galaxy cluster using data from the Galaxy Zoo project. These clusters are rare, and thus have apparently gone unnoticed before, despite their unusual properties. They appear especially anomalous when the morphological properties of their component galaxies are considered. Their identification therefore depends upon the visual inspection of large numbers of galaxies, a feat which has only recently been made possible by Galaxy Zoo, together with the Sloan Digital Sky Survey. We present the basic properties of our cluster sample, and discuss possible formation scenarios and implications for cosmology.