The missing light of the Hubble Ultra Deep Field - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2019

The missing light of the Hubble Ultra Deep Field

Alejandro Borlaff
  • Fonction : Auteur
Ignacio Trujillo
  • Fonction : Auteur
Javier Román
  • Fonction : Auteur
John E. Beckman
  • Fonction : Auteur
M. Carmen Eliche-Moral
  • Fonction : Auteur
Raúl Infante-Sáinz
  • Fonction : Auteur
Alejandro Lumbreras-Calle
  • Fonction : Auteur
Carlos Gómez-Guijarro
  • Fonction : Auteur
María Cebrián
  • Fonction : Auteur
Antonio Dorta
  • Fonction : Auteur
Nicolás Cardiel
  • Fonction : Auteur
Cristina Martínez-Lombilla
  • Fonction : Auteur

Résumé

Context. The Hubble Ultra Deep field (HUDF) is the deepest region ever observed with the Hubble Space Telescope. With the main objective of unveiling the nature of galaxies up to z ∼ 7 - 8, the observing and reduction strategy have focused on the properties of small and unresolved objects, rather than the outskirts of the largest objects, which are usually over-subtracted.
Aims: We aim to create a new set of WFC3 IR mosaics of the HUDF using novel techniques to preserve the properties of the low surface brightness regions.
Methods: We created ABYSS: a pipeline that optimises the estimate and modelling of low-level systematic effects to obtain a robust background subtraction. We have improved four key points in the reduction: 1) creation of new absolute sky flat fields, 2) extended persistence models, 3) dedicated sky background subtraction and 4) robust co-adding.
Results: The new mosaics successfully recover the low surface brightness structure removed on the previous HUDF published reductions. The amount of light recovered with a mean surface brightness dimmer than μ¯ = 26 mag arcsec-2 is equivalent to a m = 19 mag source when compared to the XDF and a m = 20 mag compared to the HUDF12.
Conclusions: We present a set of techniques to reduce ultra-deep images (μ > 32.5 mag arcsec-2, 3σ in 10 × 10 arcsec boxes), that successfully allow us to detect the low surface brightness structure of extended sources on ultra deep surveys. The developed procedures are applicable to HST, JWST, EUCLID and many other space and ground-based observatories.

The final ABYSS WFC3 IR HUDF mosaics are only available at http://www.iac.es/proyecto/abyss/ and at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/621/A133

Fichier principal
Vignette du fichier
aa34312-18.pdf (28.65 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

insu-03711440 , version 1 (01-07-2022)

Identifiants

Citer

Alejandro Borlaff, Ignacio Trujillo, Javier Román, John E. Beckman, M. Carmen Eliche-Moral, et al.. The missing light of the Hubble Ultra Deep Field. Astronomy and Astrophysics - A&A, 2019, 621, ⟨10.1051/0004-6361/201834312⟩. ⟨insu-03711440⟩
11 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More