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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 720055.0, MPI für Astronomie / Publikationen_mpia
Not in our backyard: Spectroscopic support for the CLASH z=11 candidate MACS 0647-JD
Authors:Pirzkal, N.; Coe, D.; Frye, B. L.; Brammer, G.; Moustakas, J.; Rothberg, B.; Broadhurst, T. J.; Bouwens, R.; Bradley, L.; van der Wel, A.; Kelson, D. D.; Donahue, M.; Zitrin, A.; Moustakas, L.; Barker, E.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal
Issue / Number:1
Start Page:id. 11 (7 pp)
Audience:Not Specified
Abstract / Description:We report on our first set of spectroscopic Hubble Space Telescope observations of the z≈ 11 candidate galaxy, which is strongly lensed by the MACSJ 0647.7+7015 galaxy cluster. The three lensed images are faint and we show that these early slitless grism observations are of sufficient depth to investigate whether this high-redshift candidate, identified by its strong photometric break at ≈ 1.5 μ m, could possibly be an emission line galaxy at a much lower redshift. While such an interloper would imply the existence of a rather peculiar object, we show here that such strong emission lines would clearly have been detected. Comparing realistic, two-dimensional simulations to these new observations, we would expect the necessary emission lines to be detected at \gt 5σ , though we see no evidence for such lines in the dispersed data of any of the three lensed images. We therefore exclude that this object could be a low-redshift emission line interloper, which significantly increases the likelihood of this candidate being a bona fide z≈ 11 galaxy.
Free Keywords:galaxies: high-redshift; techniques: spectroscopic
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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