YOUNG GALAXY CANDIDATES IN THE HUBBLE FRONTIER FIELDS. III. MACS. J0717.5+3745

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Laporte, N. ^{[1, 2]} ; Infante, L. ^{[1, 2]} ; Troncoso Iribarren, P. ^{[1, 3, 2]} ; Zheng, W. ^[4] ; Molino, A. ^{[5, 6]} ; Bauer, F. E. ^{[7, 1, 2, 8]} ; Bina, D. ^[9] ; Broadhurst, Tom ^{[10, 11]} ; Chilingarian, I. ^{[12, 13]} ; Garcia, S. ^{[3, 2]} ; Kim, S. ^{[1, 3]} ; Marques-Chaves, R. ^{[14, 15]} ; Moustakas, J. ^[16] ; Pello, R. ^[9] ; Perez-Fournon, I. ^{[14, 15]} ; Shu, X. ^{[17, 18]} ; Streblyanska, A. ^{[14, 15]} ; Zitrin, A. ^[19]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Pontificia Univ Catolica Chile, Inst Astrofis, Vicuna Mackenna 4860, Santiago 7820436 - Chile

^[2] Pontificia Univ Catolica Chile, Ctr Astroingn, Fac Fis, Vicuna Mackenna 4860, Santiago 7820436 - Chile

^[3] Pontificia Univ Catolica Chile, Ctr Astroingn, Vicuna Mackenna 4860, Santiago 7820436 - Chile

^[4] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 - USA

^[5] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ, BR-05508090 Sao Paulo - Brazil

^[6] Inst Astrofis Andalucia CSIC, Glorieta Astron S-N, E-18008 Granada - Spain

^[7] Space Sci Inst, Boulder, CO 80301 - USA

^[8] Millennium Inst Astrophys, Vicuna Mackenna 4860, Santiago 7820436 - Chile

^[9] CNRS, IRAP, 14 Ave Edouard Belin, F-31400 Toulouse - France

^[10] Univ Basque Country UPV EHU, Dept Theoret Phys, Bilbao - Spain

^[11] Basque Fdn Sci, Ikerbasque, Bilbao - Spain

^[12] Smithsonian Astrophys Observ, 60 Garden St MS09, Cambridge, MA 02138 - USA

^[13] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, 13 Univ Sky Prospect, Moscow 119992 - Russia

^[14] IAC, E-38200 Tenerife - Spain

^[15] ULL, Dept Astrofis, E-38205 Tenerife - Spain

^[16] Siena Coll, Dept Phys & Astron, Loudonville, NY 12211 - USA

^[17] Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui - Peoples R China

^[18] CEA Saclay, DSM Irfu Serv Astrophys, F-91191 Gif Sur Yvette - France

^[19] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 - USA

• Tipo de documento: Artigo Científico
• Fonte: ASTROPHYSICAL JOURNAL; v. 820, n. 2 APR 1 2016.
• Citações Web of Science: 23

Resumo

In this paper we present the results of our search for and study of z >= 6 galaxy candidates behind the third Frontier Fields (FFs) cluster, MACS. J0717.5+ 3745, and its parallel field, combining data from Hubble and Spitzer. We select 39 candidates using the Lyman break technique, for which the clear non-detection in optical make the extreme mid-z interlopers hypothesis unlikely. We also take benefit from z >= 6 samples selected using the previous FF data sets of Abell 2744 and MACS. 0416 to improve the constraints on the properties of very high redshift objects. We compute the redshift and the physical properties such emission lines properties, star formation rate, reddening, and stellar mass for all FF objects from their spectral energy distribution using templates including nebular emission lines. We study the relationship between several physical properties and confirm the trend already observed in previous surveys for evolution of star formation rate with galaxy mass and between the size and the UV luminosity of our candidates. The analysis of the evolution of the UV luminosity function with redshift seems more compatible with an evolution of density. Moreover, no robust z >= 8.5 object is selected behind the cluster field and few z similar to 9 candidates have been selected in the two previous data sets from this legacy survey, suggesting a strong evolution in the number density of galaxies between z similar to 8 and 9. Thanks to the use of the lensing cluster, we study the evolution of the star formation rate density produced by galaxies with L > 0.03 L-star, and confirm the strong decrease observed between z similar to 8 and 9. (AU)

• Processo FAPESP: 14/11806-9 - Desafios para a nova geração de mapeamentos fotométricos de grande campo como o J-PAS
• Beneficiário: Alberto Molino Benito
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado