Journal article
The Grism Lens-Amplified Survey from Space (GLASS). X. Sub-kiloparsec Resolution Gas-phase Metallicity Maps at Cosmic Noon behind the Hubble Frontier Fields Cluster MACS1149.6 2223
X Wang, TA Jones, T Treu, T Morishita, LE Abramson, GB Brammer, KH Huang, MA Malkan, KB Schmidt, A Fontana, C Grillo, AL Henry, W Karman, PL Kelly, CA Mason, A Mercurio, P Rosati, K Sharon, M Trenti, B Vulcani
Astrophysical Journal | Published : 2017
Abstract
We combine deep Hubble Space Telescope grism spectroscopy with a new Bayesian method to derive maps of gas-phase metallicity for 10 star-forming galaxies at high redshift (). Exploiting lensing magnification by the foreground cluster MACS1149.6+2223, we reach sub-kiloparsec spatial resolution and push the limit of stellar mass associated with such high-z spatially resolved measurements below for the first time. Our maps exhibit diverse morphologies, indicative of various effects such as efficient radial mixing from tidal torques, rapid accretion of low-metallicity gas, and other physical processes that can affect the gas and metallicity distributions in individual galaxies. Based upon an exh..
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Awarded by Japan Society for the Promotion of Science
Funding Acknowledgements
An anonymous referee is acknowledged for providing constructive comments that improve the presentation of this paper. We thank the support by NASA through grant HST-GO13459 (PI: Treu). This paper is based on observations made with the NASA/ESA Hubble Space Telescope, and utilizes gravitational lensing models produced by PIs Bradac Natarajan & Kneib (CATS), Merten & Zitrin, Sharon, and Williams, and the GLAFIC and Diego groups. This lens modeling was partially funded by the HST Frontier Fields program conducted by STScI. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. The lens models were obtained from the Mikulski Archive for Space Telescopes (MAST). Ground-based data have been obtained with the MUSE and KMOS spectrographs at the ESO VLT Telescopes. T.J. acknowledges support provided by NASA through Program #HST-HF2-51359 through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. X.W. is greatly indebted to Ryan Sanders for a careful reading of an early version of this manuscript, and to Sirio Belli, Sandy Faber, Cheng Li, Hui Li, Zhiyuan Li, Shude Mao, Houjun Mo, Alice Shapley, Yiping Shu, Alessandro Sonnenfeld, Lixin Wang, Tao Wang, Anita Zanella, and Zheng Zheng for helpful discussions. X.W. also acknowledges the warm hospitality at the Tsinghua Center for Astrophysics where a large portion of this paper was written. Last but not the least, X.W. thanks Dr. Xiao-Lei Meng for her everlasting love and support.