HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Galaxy Zoo: quantitative visual morphological classifications for 48 000 galaxies from CANDELS

B. D. Simmons Chris Lintott Kyle W. Willett Karen L. Masters Jeyhan S. Kartaltepe Boris Häußler Sugata Kaviraj Coleman Krawczyk S. J. Kruk Daniel H. Mcintosh R. J. Smethurst Robert C. Nichol Claudia Scarlata Kevin Schawinski Christopher J. Conselice Omar Almaini Henry C. Ferguson Lucy Fortson William Hartley Dale Kocevski Anton M. Koekemoer Alice Mortlock Jeffrey A. Newman Steven P. Bamford N. A. Grogin Ray A. Lucas Nimish P. Hathi 1 Elizabeth Mcgrath Michael Peth Janine Pforr 1 Zachary Rizer Stijn Wuyts Guillermo Barro Eric F. Bell Marco Castellano Tomas Dahlen Avishai Dekel Jamie Ownsworth Sandra M. Faber Steven L. Finkelstein Adriano Fontana Audrey Galametz Ruth Grützbauch David Koo Jennifer Lotz Bahram Mobasher Mark Mozena Mara Salvato Tommy Wiklind
1 LAM - Laboratoire d'Astrophysique de Marseille
Abstract : We present quantified visual morphologies of approximately 48 000 galaxies observed in three Hubble Space Telescope legacy fields by the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) and classified by participants in the Galaxy Zoo project. 90 per cent of galaxies have z ≤ 3 and are observed in rest-frame optical wavelengths by CANDELS. Each galaxy received an average of 40 independent classifications, which we combine into detailed morphological information on galaxy features such as clumpiness, bar instabilities, spiral structure, and merger and tidal signatures. We apply a consensus-based classifier weighting method that preserves classifier independence while effectively down-weighting significantly outlying classifications. After analysing the effect of varying image depth on reported classifications, we also provide depth-corrected classifications which both preserve the information in the deepest observations and also enable the use of classifications at comparable depths across the full survey. Comparing the Galaxy Zoo classifications to previous classifications of the same galaxies shows very good agreement; for some applications, the high number of independent classifications provided by Galaxy Zoo provides an advantage in selecting galaxies with a particular morphological profile, while in others the combination of Galaxy Zoo with other classifications is a more promising approach than using any one method alone. We combine the Galaxy Zoo classifications of `smooth' galaxies with parametric morphologies to select a sample of featureless discs at 1 ≤ z ≤ 3, which may represent a dynamically warmer progenitor population to the settled disc galaxies seen at later epochs.
Keywords : galaxies: bulges galaxies: elliptical and lenticular cD galaxies: evolution galaxies: general galaxies: spiral galaxies: structure Astrophysics - Astrophysics of Galaxies
Document type :
Journal articles
Complete list of metadata
https://hal-insu.archives-ouvertes.fr/insu-03666211
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Thursday, May 12, 2022 - 4:20:29 PM
Last modification on : Saturday, May 14, 2022 - 3:03:54 AM

File

Vignette du document
stw2587.pdf
Publisher files allowed on an open archive

Identifiers

Collections

INSU | LAM | UNIV-AMU | CNRS | OSU-INSTITUT-PYTHEAS

Citation

B. D. Simmons, Chris Lintott, Kyle W. Willett, Karen L. Masters, Jeyhan S. Kartaltepe, et al.. Galaxy Zoo: quantitative visual morphological classifications for 48 000 galaxies from CANDELS. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2017, 464, pp.4420-4447. ⟨10.1093/mnras/stw2587⟩. ⟨insu-03666211⟩

Export

BibTeX TEI DC DCterms EndNote Datacite

Share

Metrics

Record views

0

Files downloads

0