Toward a stellar population catalog in the Kilo Degree Survey:The impact of stellar recipes on stellar masses and star formation rates  

作　　者：Linghua Xie Nicola R.Napolitano Xiaotong Guo Crescenzo Tortora Haicheng Feng Antonios Katsianis Rui Li Sirui Wu Mario Radovich Leslie K.Hunt Yang Wang Lin Tang Baitian Tang Zhiqi Huang 

机构地区：[1]School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China [2]CSST Science Center for the Guangdong-Hongkong-Macao Greater Bay Area,Zhuhai 519082,China [3]Institute of Astronomy and Astrophysics,Anqing Normal University,Anqing 246133,China [4]INAF—Osservatorio Astronomico di Capodimonte,Napoli 80131,Italy [5]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650011,China [6]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [7]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [8]INAF—Osservatorio Astronomico di Padova,Padova 35122,Italy [9]INAF—Osservatorio Astronomico di Arcetri,Firenze 50125,Italy [10]Peng Cheng Laboratory,Shenzhen 518000,China [11]School of Physics and Astronomy,China West Normal University,Nanchong 637002,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第12期203-229,共27页中国科学：物理学、力学、天文学（英文版）

基　　金：financial support from the Research Fund for International Scholars of the National Natural Science Foundation of China(Grant No.12150710511);the support of the National Natural Science Foundation of China(Grant No.12022306);the Science Research grants from the China Manned Space Project(Grant No.CMS-CSST-2021-A01);financial support from the One Hundred Top Talent Program of the Sun Yat-sen University;the financial support of the National Natural Science Foundation of China(Grant No.12203096)。

摘　　要：The Kilo Degree Survey(Ki DS)is currently the only sky survey providing optical(ugri)plus near-infrared(NIR,ZY H JKS)seeing matched photometry over an area larger than 1000 deg2.This is obtained by incorporating the NIR data from the VISTA Kilo Degree Infrared Galaxy(VIKING)survey,covering the same Ki DS footprint.As such,the Ki DS multi-wavelength photometry represents a unique dataset to test the ability of stellar population models to return robust photometric stellar mass(M_(*))and star-formation rate(SFR)estimates.Here we use a spectroscopic sample of galaxies for which we possess ugri ZY JHK_(s)“gaussianized”magnitudes from Ki DS data release 4.We fit the spectral energy distribution from the 9-band photometry using:(1)three different popular libraries of stellar population templates,(2)single burst,simple and delayed exponential star-formation history models,and(3)a wide range of priors on age and metallicity.As template fitting codes we use two popular softwares:Le Phare and CIGALE.We investigate the variance of the stellar masses and the star-formation rates from the different combinations of templates,star formation recipes and codes to assess the stability of these estimates and define some“robust”median quantities to be included in the upcoming Ki DS data releases.As a science validation test,we derive the mass function,the star formation rate function,and the SFR-M_(*)relation for a low-redshift(z<0.5)sample of galaxies,that result in excellent agreement with previous literature data.The final catalog,containing~290000 galaxies with redshift 0.01<z<0.9,is made publicly available.

关 键 词：GALAXIES stellar populations galaxy stellar masses star formation rates stellar mass function 

分 类 号：P152[天文地球—天文学]