NOAO >   Observing Info >   Approved Programs >   2017B-0810

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Program Information for 2017B-0810


PI: Angela Speck, U. of Missouri, Columbia, speckan@missouri.edu
Address: Physics Department, 223 Physics Building, Columbia, MO 65211 USA

CoI: Sean Baldridge, U. of Missouri, Columbia

Title: WHIRC Observations of Extremely Red Objects Selected from WISE

Abstract: We propose to use WHIRC to do JHK imaging of two samples of very rare, extremely red objects selected from the WISE All-Sky Data Release. The first sample, dubbed “W1-dropout”, consists of objects that have color W1-W2>2.0 mag (AB). As it turns out, the vast majority of these objects do not have optical counterparts in the SDSS. The second sample, dubbed “WISE optical-dropout”, consists of objects selected within the SDSS Stripe 82 that are prominent detections in WISE but are completely absent from the deep Stripe 82 data. While the nature of neither populations is still very unclear, our initial guess is that the W1-dropouts are mostly brown dwarfs while the WISE optical-dropouts are mostly very high-mass, very old galaxies at around z ∼ 0.5–1.0. Our WHIRC observations will fill in the gap between the optical(< 1.0µm) and the WISE bands (> 3.0µm), and hence will be the first step in providing further clues to understand these objects. In 2016B, we request 3 grey/bright nights to observe a small but random (and thus representative) subsample from each populations.

Program Type: MOTAC

Scheduled Nights:
Run 1 (2017B):  WIYN/WHIRC -- 6n on Sep 08 - Sep 12 2017, Jan 25 - Jan 26 2018


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NOAO >   Observing Info >   Approved Programs >   2017B-0810

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