YOUNG GALAXY CANDIDATES IN THE HUBBLE FRONTIER FIELDS. II. MACS J0416-2403

Author(s):Show less -

Infante, Leopoldo ^{[1, 2]} ; Zheng, Wei ^[3] ; Laporte, Nicolas ^{[1, 2]} ; Iribarren, Paulina Troncoso ^{[1, 2]} ; Molino, Alberto ^{[4, 5]} ; Diego, Jose M. ^[6] ; Bauer, Franz E. ^{[7, 8, 1, 2]} ; Zitrin, Adi ^[9] ; Moustakas, John ^[10] ; Huang, Xingxing ^[11] ; Shu, Xinwen ^[12] ; Bina, David ^[13] ; Brammer, Gabriel B. ^[14] ; Broadhurst, Tom ^{[15, 16]} ; Ford, Holland C. ^[3] ; Garcia, Stefano ^{[1, 2]} ; Kim, Sam ^{[1, 2]}

Affiliation:Show less -

^[1] Pontificia Univ Catolica Chile, Fac Fis, Inst Astrofis, Santiago 7820436 - Chile

^[2] Pontificia Univ Catolica Chile, Fac Fis, Ctr Astroingn, Santiago 7820436 - Chile

^[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 - USA

^[4] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil

^[5] CSIC, Inst Astrofis Andalucia, E-18008 Granada - Spain

^[6] Univ Cantabria, CSIC, Inst Fis Cantabria, IFCA, E-39005 Santander - Spain

^[7] Millennium Inst Astrophys, Santiago 7820436 - Chile

^[8] Space Sci Inst, Boulder, CO 80301 - USA

^[9] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 - USA

^[10] Siena Coll, Dept Phys & Astron, Loudonville, NY 12211 - USA

^[11] Univ Sci & Technol China, Dept Astron, Hefei 230026, Anhui - Peoples R China

^[12] Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui - Peoples R China

^[13] CNRS, IRAP, F-31400 Toulouse - France

^[14] Space Telescope Sci Inst, Baltimore, MD 21218 - USA

^[15] Ikerbasque, Basque Fdn Sci, E-48011 Bilbao - Spain

^[16] Univ Basque Country, UPV EHU, Dept Theoret Phys, Bilbao - Spain

• Document type: Journal article
• Source: ASTROPHYSICAL JOURNAL; v. 815, n. 1 DEC 10 2015.
• Web of Science Citations: 14

Abstract

We searched for z greater than or similar to 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 greater than or similar to 9 and 1 lies at z greater than or similar to 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 greater than or similar to 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 (M-{*}) similar to log 8.44(-0.31)(+0.55)M(circle dot), star formation rates (SFRs) of similar to 1.8(-0.4)(+0.5) M-circle dot yr(-1), and SFR-weighted ages of less than or similar to 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 similar or equal to 10 candidate, with a magnification of mu similar to 20 +/- 13. This object is likely the faintest z similar to 10 object known to date, allowing a first look into the extreme faint end (L similar to 0.04 L{*}) of the z similar to 10 LF (It is named ``Tayna{''} in the Aymara language). (AU)

• FAPESP's process: 14/11806-9 - Challenges for the new generation of wide-field photometric redshift surveys like J-PAS
• Grantee: Alberto Molino Benito
• Support type: Scholarships in Brazil - Post-Doctorate