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Young Galaxy Candidates in the Hubble Frontier Fields. II. MACS J0416-2403

Infante, Leopoldo and Zheng, Wei and Laporte, Nicolas and Troncoso Iribarren, Paulina and Molino, Alberto and Diego, Jose M. and Bauer, Franz E. and Zitrin, Adi and Moustakas, John and Huang, Xingxing and Shu, Xinwen and Bina, David and Brammer, Gabriel B. and Broadhurst, Tom and Ford, Holland C. and García, Stefano and Kim, Sam (2015) Young Galaxy Candidates in the Hubble Frontier Fields. II. MACS J0416-2403. Astrophysical Journal, 815 (1). Art. No. 18. ISSN 0004-637X.

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We searched for z ≳ 7 Lyman-break galaxies in the optical-to-mid-infrared Hubble Frontier Field and associated parallel field observations of the strong-lensing cluster MACS J0416−2403. We discovered 22 candidates, of which 6 lie at z ≳ 9 and 1 lies at z ≳ 10. Based on the Hubble and Spitzer photometry, all have secure photometric redshifts and a negligible probability of being at lower redshifts according to their peak-probability ratios, R. This substantial increase in the number of known high-redshift galaxies allows a solid determination of the luminosity function (LF) at z ≳ 8. The number of high-z candidates in the parallel field is considerably higher than that in the Abell 2744 parallel field. Our candidates have median stellar masses of log M_* ~ 8.44_(-0.31)^(+0.55) M_⊙, star formation rates (SFRs) of ~ 1.8_(-0.4)^(+0.5) M_⊙ yr^(−1), and SFR-weighted ages of ≾ 300_(-140)^(+70) Myr. Finally, we are able to put strong constraints on the z = 7, 8, 9, and 10 LFs. One of the objects in the cluster field is a z ≃ 10 candidate, with a magnification of μ ~ 20 ± 13. This object is likely the faintest z ~ 10 object known to date, allowing a first look into the extreme faint end (L ~ 0.04 L^*) of the z ~ 10 LF (It is named "Tayna" in the Aymara language).

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Troncoso Iribarren, Paulina0000-0001-6162-3023
Diego, Jose M.0000-0001-9065-3926
Bauer, Franz E.0000-0002-8686-8737
Zitrin, Adi0000-0002-0350-4488
Brammer, Gabriel B.0000-0003-2680-005X
Additional Information:© 2015 The American Astronomical Society. Received 2015 March 2; accepted 2015 October 23; published 2015 December 2. The work presented in this paper is based on observations made with the NASA/ESA Hubble Space Telescope, and has been supported by award AR-13279 from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. It is also based on data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. We acknowledge support from Basal-CATA PFB-06/2007 (L.I., F.E.B., N.L., S.K., and P.T.), FP7-SPACE-2012-ASTRODEEP-312725 (X.S.), NSFC grants 11103017 and 11233002 (X.S.), NASA through Hubble Fellowship grant HST-HF2-51334.01-A awarded by STScI (A.Z.), CONICYT-Chile grants FONDECYT 1141218 (F.E.B.), Gemini-CONICYT 32120003 (F.E.B. and N.L.), and "EMBIGGEN" Anillo ACT1101 (F.E.B.), the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS (F.E.B.), Spanish consolider project CAD2010-00064 and AYA2012-39475-C02-01 (J.M.D.), the Brazilian funding agency-FAPESP post doc fellowship—process number 2014/11806-9 (A.M.) and CONICYT-Chile grant FONDECYT 3140542 (P.T.). L.I. would like to thank the European Southern Observatory and the University of Victoria, Canada, for providing office space while this work was done.
Funding AgencyGrant Number
Space Telescope Science InstituteAR-13279
NASANAS 5-26555
European Research Council (ERC)ASTRODEEP 312725
National Science Foundation China11103017
National Science Foundation China11233002
Space Telescope Science Institute (STScI)HST-HF2-51334.01-A
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1141218
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)32120003
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)Anillo ACT1101
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y TurismoIC120009
Ministerio de Economía y Competitividad (MINECO)CAD2010-00064
Ministerio de Economía y Competitividad (MINECO)AYA2012-39475-C02-01
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)2014/11806-9
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)3140542
Subject Keywords:cosmology: observations; galaxies: clusters: individual (MACS0416) ; galaxies: high-redshift; gravitational lensing: strong
Issue or Number:1
Record Number:CaltechAUTHORS:20160115-114605917
Persistent URL:
Official Citation:Leopoldo Infante et al 2015 ApJ 815 18
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63709
Deposited By: Ruth Sustaita
Deposited On:15 Jan 2016 20:34
Last Modified:09 Mar 2020 13:19

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