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Mapping the Galactic Halo. IV. Finding Distant Giants Reliably with the Washington System

Morrison, Heather; Olszewski, Edward W; Mateo, Mario; Norris, John; Harding, Paul; Dohm-Palmer, Robbie C; Freeman, Kenneth


We critically examine the use of the Washington photometric system (with the DDO51 filter) for identifying distant halo giants. While this is the most powerful photometric technique for isolating G and K giant stars, spectroscopic follow-up of giant candidates is vital. There are two situations in which interlopers outnumber genuine giants in the diagnostic M - 51/M -T2 plot and are indistinguishable photometrically from the giants. (1) In deep surveys covering tens of square degrees, very...[Show more]

CollectionsANU Research Publications
Date published: 2001
Type: Journal article
Source: Astronomical Journal


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