First Batch of z ≈ 11–20 Candidate Objects Revealed by the James Webb Space Telescope Early Release Observations on SMACS 0723-73
نویسندگان
چکیده
Abstract On 2022 July 13, NASA released to the whole world data obtained by James Webb Space Telescope (JWST) Early Release Observations (ERO). These are first set of science-grade from this long-awaited facility, marking beginning a new era in astronomy. In study early universe, JWST will allow us push far beyond z ≈ 11, redshift boundary previously imposed 1.7 μ m red cutoff Hubble (HST). contrast, JWST’s NIRCam reaches ∼5 m. Among ERO targets there is nearby galaxy cluster SMACS 0723-73, which massive and has been long recognized as potential “cosmic telescope” amplifying background galaxies. The six-band observations on target have covered an additional flanking field not boosted gravitational lensing, also sees HST. Here we report result our search candidate objects at > 11 using these data. total, 87 such identified standard “dropout” technique. all detected multiple bands therefore cannot be spurious. For most them, their multiband colors inconsistent with known types contaminants. If dropout signature interpreted expected Lyman break, it implies that 11–20. large number high redshifts favored predictions demands further investigations. spectroscopy critical.
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ژورنال
عنوان ژورنال: The astrophysical journal
سال: 2022
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/2041-8213/aca80c