Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles The Astrophysical journal letters Year : 2023

Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Jorge A. Zavala , Véronique Buat (1) , Caitlin M. Casey , Steven L. Finkelstein , Denis Burgarella (1) , Micaela B. Bagley , Laure Ciesla (1) , Emanuele Daddi (2) , Mark Dickinson , Henry C. Ferguson , Maximilien Franco , E. F. Jiménez-Andrade , Jeyhan S. Kartaltepe , Anton M. Koekemoer , Aurélien Le Bail (2) , E. J. Murphy , Casey Papovich , Sandro Tacchella , Stephen M. Wilkins , Itziar Aretxaga , Peter Behroozi , Jaclyn B. Champagne , Adriano Fontana , Mauro Giavalisco , Andrea Grazian , Norman A. Grogin , Lisa J. Kewley , Dale D. Kocevski , Allison Kirkpatrick , Jennifer M. Lotz , Laura Pentericci , Pablo G. Pérez-González , Nor Pirzkal , Swara Ravindranath , Rachel S. Somerville , Jonathan R. Trump , Guang Yang , L. Y. Aaron Yung , Omar Almaini , Ricardo O. Amorín , Marianna Annunziatella , Pablo Arrabal Haro , Bren E. Backhaus , Guillermo Barro , Eric F. Bell , Rachana Bhatawdekar , Laura Bisigello , Fernando Buitrago , Antonello Calabrò , Marco Castellano , Óscar A. Chávez Ortiz , Katherine Chworowsky , Nikko J. Cleri , Seth H. Cohen , Justin W. Cole , Kevin C. Cooke , M. C. Cooper , Asantha R. Cooray , Luca Costantin , Isabella G. Cox , Darren Croton , Romeel Davé , Alexander de La Vega , Avishai Dekel , David Elbaz (2) , Vicente Estrada-Carpenter , Vital Fernández , Keely D. Finkelstein , Jonathan Freundlich (3) , Seiji Fujimoto , Ángela García-Argumánez , Jonathan P. Gardner , Eric Gawiser , Carlos Gómez-Guijarro (2) , Yuchen Guo , Timothy S. Hamilton , Nimish P. Hathi , Benne W. Holwerda , Michaela Hirschmann , Marc Huertas-Company , Taylor A. Hutchison , Kartheik G. Iyer , Anne E. Jaskot , Saurabh W. Jha , Shardha Jogee , Stéphanie Juneau , Intae Jung , Susan A. Kassin , Peter Kurczynski , Rebecca L. Larson , Gene C. K. Leung , Arianna S. Long , Ray A. Lucas , Benjamin Magnelli (2) , Kameswara Bharadwaj Mantha , Jasleen Matharu , Elizabeth J. Mcgrath , Daniel H. Mcintosh , Aubrey Medrano , Emiliano Merlin , Bahram Mobasher , Alexa M. Morales , Jeffrey A. Newman , David C. Nicholls , Viraj Pandya , Marc Rafelski , Kaila Ronayne , Caitlin Rose , Russell E. Ryan , Paola Santini , Lise-Marie Seillé (1) , Ekta A. Shah , Lu Shen , Raymond C. Simons , Gregory F. Snyder , Elizabeth R. Stanway , Amber N. Straughn , Harry I. Teplitz , Brittany N. Vanderhoof , Jesús Vega-Ferrero , Weichen Wang , Benjamin J. Weiner , Christopher N. A. Willmer , Stijn Wuyts
Jorge A. Zavala
  • Function : Author
Caitlin M. Casey
  • Function : Author
Steven L. Finkelstein
  • Function : Author
Micaela B. Bagley
  • Function : Author
Mark Dickinson
  • Function : Author
Henry C. Ferguson
  • Function : Author
Maximilien Franco
  • Function : Author
E. F. Jiménez-Andrade
  • Function : Author
Jeyhan S. Kartaltepe
  • Function : Author
Anton M. Koekemoer
  • Function : Author
E. J. Murphy
  • Function : Author
Casey Papovich
  • Function : Author
Sandro Tacchella
  • Function : Author
Stephen M. Wilkins
  • Function : Author
Itziar Aretxaga
  • Function : Author
Peter Behroozi
  • Function : Author
Jaclyn B. Champagne
  • Function : Author
Adriano Fontana
  • Function : Author
Mauro Giavalisco
  • Function : Author
Andrea Grazian
  • Function : Author
Norman A. Grogin
  • Function : Author
Lisa J. Kewley
  • Function : Author
Dale D. Kocevski
  • Function : Author
Allison Kirkpatrick
  • Function : Author
Jennifer M. Lotz
  • Function : Author
Laura Pentericci
  • Function : Author
Pablo G. Pérez-González
  • Function : Author
Nor Pirzkal
  • Function : Author
Swara Ravindranath
  • Function : Author
Rachel S. Somerville
  • Function : Author
Jonathan R. Trump
  • Function : Author
Guang Yang
  • Function : Author
L. Y. Aaron Yung
  • Function : Author
Omar Almaini
  • Function : Author
Ricardo O. Amorín
  • Function : Author
Marianna Annunziatella
  • Function : Author
Pablo Arrabal Haro
  • Function : Author
Bren E. Backhaus
  • Function : Author
Guillermo Barro
  • Function : Author
Eric F. Bell
  • Function : Author
Rachana Bhatawdekar
  • Function : Author
Laura Bisigello
  • Function : Author
Fernando Buitrago
  • Function : Author
Antonello Calabrò
  • Function : Author
Marco Castellano
  • Function : Author
Óscar A. Chávez Ortiz
  • Function : Author
Katherine Chworowsky
  • Function : Author
Nikko J. Cleri
  • Function : Author
Seth H. Cohen
  • Function : Author
Justin W. Cole
  • Function : Author
Kevin C. Cooke
  • Function : Author
M. C. Cooper
  • Function : Author
Asantha R. Cooray
  • Function : Author
Luca Costantin
  • Function : Author
Isabella G. Cox
  • Function : Author
Darren Croton
  • Function : Author
Romeel Davé
  • Function : Author
Alexander de La Vega
  • Function : Author
Avishai Dekel
  • Function : Author
Vicente Estrada-Carpenter
  • Function : Author
Vital Fernández
  • Function : Author
Keely D. Finkelstein
  • Function : Author
Seiji Fujimoto
  • Function : Author
Ángela García-Argumánez
  • Function : Author
Jonathan P. Gardner
  • Function : Author
Eric Gawiser
  • Function : Author
Yuchen Guo
  • Function : Author
Timothy S. Hamilton
  • Function : Author
Nimish P. Hathi
  • Function : Author
Benne W. Holwerda
  • Function : Author
Michaela Hirschmann
  • Function : Author
Marc Huertas-Company
  • Function : Author
Taylor A. Hutchison
  • Function : Author
Kartheik G. Iyer
  • Function : Author
Anne E. Jaskot
  • Function : Author
Saurabh W. Jha
  • Function : Author
Shardha Jogee
  • Function : Author
Stéphanie Juneau
  • Function : Author
Intae Jung
  • Function : Author
Susan A. Kassin
  • Function : Author
Peter Kurczynski
  • Function : Author
Rebecca L. Larson
  • Function : Author
Gene C. K. Leung
  • Function : Author
Arianna S. Long
  • Function : Author
Ray A. Lucas
  • Function : Author
Kameswara Bharadwaj Mantha
  • Function : Author
Jasleen Matharu
  • Function : Author
Elizabeth J. Mcgrath
  • Function : Author
Daniel H. Mcintosh
  • Function : Author
Aubrey Medrano
  • Function : Author
Emiliano Merlin
  • Function : Author
Bahram Mobasher
  • Function : Author
Alexa M. Morales
  • Function : Author
Jeffrey A. Newman
  • Function : Author
David C. Nicholls
  • Function : Author
Viraj Pandya
  • Function : Author
Marc Rafelski
  • Function : Author
Kaila Ronayne
  • Function : Author
Caitlin Rose
  • Function : Author
Russell E. Ryan
  • Function : Author
Paola Santini
  • Function : Author
Ekta A. Shah
  • Function : Author
Lu Shen
  • Function : Author
Raymond C. Simons
  • Function : Author
Gregory F. Snyder
  • Function : Author
Elizabeth R. Stanway
  • Function : Author
Amber N. Straughn
  • Function : Author
Harry I. Teplitz
  • Function : Author
Brittany N. Vanderhoof
  • Function : Author
Jesús Vega-Ferrero
  • Function : Author
Weichen Wang
  • Function : Author
Benjamin J. Weiner
  • Function : Author
Christopher N. A. Willmer
  • Function : Author
Stijn Wuyts
  • Function : Author

Abstract

Lyman-break galaxy (LBG) candidates at z ≳ 10 are rapidly being identified in James Webb Space Telescope (JWST)/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources are expected to drop out in the bluer filters while being well detected in redder filters. However, here we show that dust-enshrouded star-forming galaxies at lower redshifts (z ≲ 7) may also mimic the near-infrared (near-IR) colors of z > 10 LBGs, representing potential contaminants in LBG candidate samples. First, we analyze CEERS-DSFG-1, a NIRCam dropout undetected in the F115W and F150W filters but detected at longer wavelengths. Combining the JWST data with (sub)millimeter constraints, including deep NOEMA interferometric observations, we show that this source is a dusty star-forming galaxy (DSFG) at z ≈ 5.1. We also present a tentative 2.6σ SCUBA-2 detection at 850 μm around a recently identified z ≈ 16 LBG candidate in the same field and show that, if the emission is real and associated with this candidate, the available photometry is consistent with a z ~ 5 dusty galaxy with strong nebular emission lines despite its blue near-IR colors. Further observations on this candidate are imperative to mitigate the low confidence of this tentative submillimeter emission and its positional uncertainty. Our analysis shows that robust (sub)millimeter detections of NIRCam dropout galaxies likely imply z ~ 4-6 redshift solutions, where the observed near-IR break would be the result of a strong rest-frame optical Balmer break combined with high dust attenuation and strong nebular line emission, rather than the rest-frame UV Lyman break. This provides evidence that DSFGs may contaminate searches for ultra-high redshift LBG candidates from JWST observations.
Fichier principal
Vignette du fichier
Zavala_2023_ApJL_943_L9.pdf (2.01 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

insu-04030807 , version 1 (16-03-2023)

Licence

Identifiers

Cite

Jorge A. Zavala, Véronique Buat, Caitlin M. Casey, Steven L. Finkelstein, Denis Burgarella, et al.. Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations. The Astrophysical journal letters, 2023, 943, ⟨10.3847/2041-8213/acacfe⟩. ⟨insu-04030807⟩
123 View
62 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More