GN4-3

GN4-3.

Introduction

GN4-3 is an astronomical source identified in deep-field observations associated with extragalactic surveys conducted by teams linked to Hubble Space Telescope, James Webb Space Telescope, Subaru Telescope, Keck Observatory and Atacama Large Millimeter/submillimeter Array. It appears in catalogs used by projects such as the Great Observatories Origins Deep Survey, the Hubble Ultra Deep Field program and legacy compilations from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey. GN4-3 has been referenced in papers by groups at institutions like California Institute of Technology, Harvard University, Max Planck Society, European Southern Observatory and National Aeronautics and Space Administration.

Discovery and Observational History

GN4-3 was first flagged in multiwavelength imaging by teams using the Hubble Space Telescope and follow-up spectroscopy at Keck Observatory and the Very Large Telescope. Subsequent photometric and spectroscopic campaigns involved collaborations among researchers at Space Telescope Science Institute, Carnegie Institution for Science, University of California, Berkeley, Princeton University and University of Cambridge. Observations were incorporated into survey datasets alongside targets from Sloan Digital Sky Survey, Cosmic Evolution Survey, CANDELS and GOODS-North, and GN4-3 featured in analysis using pipelines developed by groups at Jet Propulsion Laboratory, National Radio Astronomy Observatory and European Space Agency.

Physical Characteristics

Studies of GN4-3 report measurements drawing on instruments such as Near Infrared Camera (NIRCam), Wide Field Camera 3, Multi-Object Spectrometer for Infra-Red Exploration and bolometer arrays on ALMA. Reported properties include redshift estimates compared with standards from Lyman-alpha line studies and continuum breaks used in comparisons with objects cataloged by Hubble Deep Field analyses. Photometry and spectral energy distribution fitting utilized models from teams at Max Planck Institute for Astronomy, Yale University, University of Oxford and Columbia University to infer stellar mass, star-formation rate and dust attenuation. Kinematic constraints were compared against rotation curves measured in studies of objects observed by Keck/DEIMOS, VLT/X-shooter and Gemini Observatory. Elemental abundance indicators were cross-checked with calibrations from Sloan Digital Sky Survey science teams and theoretical yields from groups associated with Lawrence Berkeley National Laboratory and Institute for Advanced Study.

Environment and Host Galaxy

GN4-3's local environment has been analyzed in the context of structure mapping by teams involved with Cosmic Microwave Background cross-correlations and density reconstructions used in Illustris and EAGLE simulation comparisons. Its host association was evaluated through clustering statistics published by researchers at University of Tokyo, University of Chicago, Princeton University and Rutgers University, with environment metrics referenced against catalogs from CFHT Legacy Survey, Subaru Hyper Suprime-Cam and the Pan-STARRS project. Neighboring sources in the field have been cross-listed with objects detected in surveys led by Spitzer Space Telescope, Chandra X-ray Observatory and GALEX, and environmental interpretations invoked frameworks developed by teams at Flatiron Institute and Kavli Institute for the Physics and Mathematics of the Universe.

Significance and Research Applications

GN4-3 has been used as a case study in methodological papers on photometric redshift techniques authored by groups at University of Michigan, Columbia University, University of Edinburgh and ETH Zurich, and in cross-calibration exercises involving Hubble Space Telescope, James Webb Space Telescope and ALMA data reduction teams. Its inclusion in surveys has informed analyses related to galaxy formation scenarios discussed in work by researchers at Max Planck Institute for Astrophysics, Institute for Advanced Study, University of California, Santa Cruz and Princeton University. GN4-3 also appears in comparative studies addressing reionization-era candidates cataloged in compilations from COSMOS and CANDELS, and it has been cited in methodological comparisons involving population synthesis codes developed at Space Telescope Science Institute, Geneva Observatory and Padova Observatory.

Category:Extragalactic objects