Abstract
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. ◦ 5 × 3 ◦ and 10 ◦ × 3 ◦ , and a circular structure 3 ◦ in diameter. Together, the three features span 38 ◦ of right ascension and declinations of 2 ◦ to −15 ◦ . RR Lyrae variables place the two filamentary features at heliocentric distances of 20 and 17 kpc, respectively, with projected dimensions of 5 × 1 and 3 × 1 kpc.
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