Journal article

RELICS: Properties of z >= 5.5 Galaxies Inferred from Spitzer and Hubble Imaging, Including A Candidate z similar to 6.8 Strong [O iii] emitter

Victoria Strait, Marusa Bradac, Dan Coe, Brian C Lemaux, Adam C Carnall, Larry Bradley, Debora Pelliccia, Keren Sharon, Adi Zitrin, Ana Acebron, Chloe Neufeld, Felipe Andrade-Santos, Roberto J Avila, Brenda L Frye, Guillaume Mahler, Mario Nonino, Sara Ogaz, Masamune Oguri, Masami Ouchi, Rachel Paterno-Mahler Show all



We present constraints on the physical properties (including stellar mass, age, and star formation rate) of 207 6 ≲ z ≲ 8 galaxy candidates from the Reionization Lensing Cluster Survey (RELICS) and Spitzer-RELICS surveys. We measure photometry using T-PHOT and perform spectral energy distribution fitting using EAzY and BAGPIPES. Of the 207 candidates for which we could successfully measure (or place limits on) Spitzer fluxes, 23 were demoted to likely z < 4. Among the high-z candidates, we find intrinsic stellar masses between 1 × 106 M o˙ and 4 × 109 M o˙, and rest-frame UV absolute magnitudes between -22.6 and -14.5 mag. While our sample is mostly comprised of galaxies, it extends to . Our..

View full abstract

University of Melbourne Researchers


Awarded by NASA

Awarded by NASA through ADAP

Awarded by NSF

Awarded by NASA/HST

Awarded by Heising-Simons Foundation

Funding Acknowledgements

This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. It is also based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Support for this work was provided by NASA through ADAP grant 80NSSC18K0945, NSF grant AST 1815458, NASA/HST grant HST-GO-14096, and through an award issued by JPL/Caltech. V.S. also acknowledges support through Heising-Simons Foundation grant no. 2018-1140.This work also refers to observations obtained at the international Gemini Observatory, a program of NSF's OIR Lab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation on behalf of the Gemini Observatory partnership: the National Science Foundation (United States), National Research Council (Canada), Agencia Nacional de Investigacion y Desarrollo (Chile), Ministerio de Ciencia, Tecnologia e Innovacion (Argentina), Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (Brazil), and Korea Astronomy and Space Science Institute (Republic of Korea). The guaranteed observations used here were obtained through Ben-Gurion University's (BGU; Israel) time on Gemini, following an memorandum of understanding between BGU and Gemini/AURA.