Using JADES NIRCam photometry to investigate the dependence of stellar mass inferences on the IMF in the early universe

• 成果类型: Article
• 署名作者: Woodrum, Charity; Rieke, Marcia; Ji, Zhiyuan; Baker, William M.; Bhatawdekar, Rachana; Bunker, Andrew J.; Charlot, Stephane; Curtis-Lake, Emma; Eisenstein, Daniel J.; Hainline, Kevin; Hausen, Ryan; Helton, Jakob M.; Hviding, Raphael E.; Johnson, Benjamin D.; Robertson, Brant; Sun, Fengwu; Tacchella, Sandro; Whitler, Lily; Williams, Christina C.; Willmer, Christopher N. A.
• 署名单位: University of Arizona; University of Cambridge; University of Cambridge; European Space Agency; European Space Astronomy Center; University of Oxford; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Sorbonne Universite; University of Hertfordshire; Smithsonian Institution; Johns Hopkins University; Max Planck Society; University of California System; University of California Santa Cruz
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14385
• DOI: 10.1073/pnas.2317375121
• 发表日期: 2024-10-08
• 关键词: 1st billion years; star-formation; population synthesis; galaxies; EVOLUTION; miles; dust

摘要

The detection of numerous and relatively bright galaxies at redshifts z > 9 has prompted new investigations into the star-forming properties of high-redshift galaxies. Using local forms of the initial mass function (IMF) to estimate stellar masses of these galaxies from their light output leads to galaxy masses that are at the limit allowed for explore how varying the IMF assumed in studies of galaxies in the early universe changes the inferred values for the stellar masses of these galaxies. We infer galaxy properties with the spectral energy distribution (SED) fitting code Prospector using varying IMF parameterizations for a sample of 102 galaxies with photometry from the James Webb confirmed to be at z > 6.7, with additional photometry from the JWST Extragalactic Medium Band Survey for twenty-one of the galaxies. We demonstrate that models with stellar masses reduced by a factor of three or more do not affect the modeled SED.