1. Главная
  2. Ресурсы
  3. Библиотечный поиск
JWST UNCOVER:Extremely Red andCompact Object at zphot ≃ 7.6 TriplyImaged by A2744 Lukas J. FurtakAdi ZitrinAdèle Plat2023 год

JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: Abstract Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z phot ≃ 7.6, triply imaged by the galaxy cluster A2744 ( z d = 0.308). All three images are very compact, i.e., unresolved, with a delensed size upper limit of r e ≲ 35 pc. The images have apparent magnitudes of m F444W ∼ 25−26 AB, and the magnification-corrected absolute UV magnitude of the source is M UV,1450 = −16.81 ± 0.09. From the sum of observed fluxes and from a spectral energy distribution (SED) analysis, we obtain estimates of the bolometric luminosities of the source of L bol ≳ 10 43 erg s −1 and L bol ∼ 10 44 –10 46 erg s −1 , respectively. Based on its compact, point-like appearance, its position in color–color space, and the SED analysis, we tentatively conclude that this object is a UV-faint dust-obscured quasar-like object, i.e., an active galactic nucleus at high redshift. We also discuss other alternative origins for the object’s emission features, including a massive star cluster, Population III, supermassive, or dark stars, or a direct-collapse black hole. Although populations of red galaxies at similar photometric redshifts have been detected with JWST, this object is unique in that its high-redshift nature is corroborated geometrically by lensing, that it is unresolved despite being magnified—and thus intrinsically even more compact—and that it occupies notably distinct regions in both size–luminosity and color–color space. Planned UNCOVER JWST/NIRSpec observations, scheduled in Cycle 1, will enable a more detailed analysis of this object.
Год издания: 2023
Авторы: Lukas J. Furtak, Adi Zitrin, Adèle Plat, Seiji Fujimoto, Bingjie Wang, Erica J. Nelson, Ivo Labbé, Rachel Bezanson, Gabriel Brammer, Pieter van Dokkum, Ryan Endsley, Karl Glazebrook, Jenny E. Greene, Joel Leja, Sedona H. Price, Renske Smit, Daniel P. Stark, John R. Weaver, Katherine E. Whitaker, Hakim Atek, Jacopo Chevallard, Emma Curtis-Lake, Pratika Dayal, Anna Feltre, Marijn Franx, Yoshinobu Fudamoto, Danilo Marchesini, Lamiya Mowla, Richard Pan, Katherine A. Suess, Alba Vidal-García, Christina C. Williams
Издательство: IOP Publishing
Источник: The Astrophysical Journal
Ключевые слова: Galaxies: Formation, Evolution, Phenomena, Gamma-ray bursts and supernovae, Astronomy and Astrophysical Research
Другие ссылки: The Astrophysical Journal (PDF)
The Astrophysical Journal (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
University of Hertfordshire Research Archive (University of Hertfordshire) (PDF)
University of Hertfordshire Research Archive (University of Hertfordshire) (HTML)
Liverpool John Moores University (HTML)
Leiden Repository (Leiden University) (PDF)
Leiden Repository (Leiden University) (HTML)
University of Groningen research database (University of Groningen / Centre for Information Technology) (HTML)
University of Groningen research database (University of Groningen / Centre for Information Technology) (PDF)
University of Groningen research database (University of Groningen / Centre for Information Technology) (HTML)