Open AccessLuminosity function of high-z object candidates at the epoch of reionization (z ≳ 6) in cosmic evolution survey (COSMOS) field
Author(s) -
Narenrit Thananusak,
U. Sawangwit,
S. Wannawichian
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1380/1/012132
Subject(s) - reionization , physics , photometry (optics) , redshift , astrophysics , galaxy , cosmic cancer database , astronomy , telescope , luminosity function , infrared , stars
The investigation of the luminosity functions (LF) of objects at the epoch of reionization or EoR ( z ≳ 6) is crucial for placing stronger constraints on the contribution of different ionizing photon sources. In this study, we aim to estimate the luminosity functions of z ≳ 6 candidates. The data catalog obtained from Hyper Suprime-Cam Strategic Program (HSC-SSP) ultra-deep survey data released one and the ultra-deep Visible and Infrared Survey Telescope for Astronomy (UltraVISTA) data released four in optical (rizy) and near-infrared (YJHK s ) photometry filters, respectively. We focus the deep survey on Cosmic Evolution Survey (COSMOS) field, centered at RA ∼ 10 h 00 m 28.6 s DEC ∼ +2°12′21.0″. The 79 candidates are selected by the Lyman Break Galaxies (LBGs) technique with z band drop-out, and photometric redshift approximation (photo- z ). We then used the candidates to calculate the z ≳ 6 LF. Accordingly, we compare the LF with other works that focus on the high- z objects at similar z -range.