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Barnes and Noble

Identifying Identical Twin Star Systems from the SDSS Data Release 10

Current price: $11.14
Identifying Identical Twin Star Systems from the SDSS Data Release 10
Identifying Identical Twin Star Systems from the SDSS Data Release 10

Barnes and Noble

Identifying Identical Twin Star Systems from the SDSS Data Release 10

Current price: $11.14
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Data mining the SDSS Data Release 10 has yielded a total of 481 pairs of stars separated by between 3 and 30 arc second where all five listed de-reddened magnitudes (u, g, r, i and z bands) for the two stars are within 0.05 magnitudes. 473 of these binary stars are believed to be new discoveries. The SDSS provides photometry in five different wavebands and these results can be used to estimate the spectral energy distribution of the star. It is possible to extrapolate from the SDSS results obtained from previously studied stars to the absolute magnitude, and hence the distance, of previously unstudied stars. An extension of this idea of photometric parallax is the idea, presented for the first time in this paper, that if two stars have, essentially, identical re-reddened photometry in all five SDSS wavebands then they must be at the same distance, especially if the angular separation between them is less than 30 arc seconds.

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Barnes & Noble does business -- big business -- by the book. As the #1 bookseller in the US, it operates about 720 Barnes & Noble superstores (selling books, music, movies, and gifts) throughout all 50 US states and Washington, DC. The stores are typically 10,000 to 60,000 sq. ft. and stock between 60,000 and 200,000 book titles. Many of its locations contain Starbucks cafes, as well as music departments that carry more than 30,000 titles.

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