期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 394, 期 2, 页码 1045-1050出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1365-2966.2009.14393.x
关键词
Galaxy: halo; Galaxy: structure
资金
- Australian Research Council [DP0343962, DP0878137]
- Australian Research Council [DP0343962, DP0878137] Funding Source: Australian Research Council
We map the three-dimensional extent of the Virgo overdensity by combining distance information from RR Lyrae variables and projected spatial information from the Southern Edgeworth-Kuiper Belt Object Survey and Sloan Digital Sky Survey Data Release 6 photometry. The Virgo overdensity is seen to comprise two filaments 14.degrees 5 x 3 degrees and 10 degrees x 3 degrees, and a circular structure 3 degrees in diameter. Together, the three features span 38 degrees of right ascension and declinations of 2 degrees to - 15 degrees. RR Lyrae variables place the two filamentary features at heliocentric distances of 20 and 17 kpc, respectively, with projected dimensions of 5 x 1 and 3 x 1 kpc.
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