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Extremely Close Pairs in zCOSMOS

Claire LACKNER
(Kavli IPMU)

I will present an automated method for finding galaxy pairs within several kiloparsecs. Eighty percent of these galaxies are not included in the zCOSMOS pair sample, nor can they be easily selected using other non-parametric methods. These galaxies have an elevated AGN fraction (13 +/- 5%) and an elevated star formation rate compared to isolated galaxies, in agreement with previous work on more widely separated galaxy pairs.


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