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Published November 10, 2015 | Published
Journal Article Open

Submillimeter Observations of CLASH 2882 and the Evolution of Dust in this Galaxy

Abstract

Two millimeter observations of the MACS J1149.6+2223 cluster have detected a source that was consistent with the location of the lensed MACS 1149-JD galaxy at z = 9.6. A positive identification would have rendered this galaxy as the youngest dust forming galaxy in the universe. Follow up observation with the AzTEC 1.1 mm camera and the IRAM NOrthern Extended Millimeter Array (NOEMA) at 1.3 mm have not confirmed this association. In this paper we show that the NOEMA observations associate the 2 mm source with [PCB2012] 2882, source number 2882 in the Cluster Lensing And Supernova survey with Hubble (CLASH) catalog of MACS J1149.6+2223. This source, hereafter referred to as CLASH 2882, is a gravitationally lensed spiral galaxy at z = 0.99. We combine the Goddard IRAM Superconducting 2-Millimeter Observer (GISMO) 2 mm and NOEMA 1.3 mm fluxes with other (rest frame) UV to far-IR observations to construct the full spectral energy distribution of this galaxy, and derive its star formation history, and stellar and interstellar dust content. The current star formation rate of the galaxy is $54 µ^(-1) M_⊙ yr^(−1), and its dust mass is about 5 × 10^7 µ^(-1) M_⊙, where μ is the lensing magnification factor for this source, which has a mean value of 2.7. The inferred dust mass is higher than the maximum dust mass that can be produced by core collapse supernovae and evolved AGB stars. As with many other star forming galaxies, most of the dust mass in CLASH 2882 must have been accreted in the dense phases of the interstellar medium.

Additional Information

© 2015. The American Astronomical Society. Received 2015 July 30; accepted 2015 September 30; published 2015 November 5. This work was supported by NASA's 12-ADP12-0145 and 13-ADAP13-0094 research grants, and supported through NSF ATI grant 1106284. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). S.T. acknowledges support from the ERC Consolidator Grant funding scheme (project ConTExt, grant number. 648179). This work utilizes gravitational lensing models produced by PIs Bradač, Ebeling, Merten & Zitrin, Sharon, and Williams funded as part of 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), https://archive.stsci.edu/prepds/frontier/lensmodels/.

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Created:
August 22, 2023
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October 25, 2023