The ATLAS3D project – XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
Why is this work in the frame?
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
- Teacher spread
- 0.222 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
Galactic archaeology based on star counts is instrumental to reconstruct the past mass assembly of Local Group galaxies. The development of new observing techniques and data reduction, coupled with the use of sensitive large field of view cameras, now allows us to pursue this technique in more distant galaxies exploiting their diffuse low surface brightness (LSB) light. As part of the ATLAS3D project, we have obtained with the MegaCam camera at the Canada–France–Hawaii Telescope extremely deep, multiband images of nearby early-type galaxies (ETGs). We present here a catalogue of 92 galaxies from the ATLAS3D sample, which are located in low- to medium-density environments. The observing strategy and data reduction pipeline, which achieve a gain of several magnitudes in the limiting surface brightness with respect to classical imaging surveys, are presented. The size and depth of the survey are compared to other recent deep imaging projects. The paper highlights the capability of LSB-optimized surveys at detecting new prominent structures that change the apparent morphology of galaxies. The intrinsic limitations of deep imaging observations are also discussed, among those, the contamination of the stellar haloes of galaxies by extended ghost reflections, and the cirrus emission from Galactic dust. The detection and systematic census of fine structures that trace the present and past mass assembly of ETGs are one of the prime goals of the project. We provide specific examples of each type of observed structures – tidal tails, stellar streams and shells – and explain how they were identified and classified. We give an overview of the initial results. The detailed statistical analysis will be presented in future papers.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
The record
- Venue
- Monthly Notices of the Royal Astronomical Society
- Topic
- Advanced Vision and Imaging
- Field
- Computer Science
- Canadian institutions
- —
- Funders
- Max-Planck-Institut für AstronomieMax-Planck-GesellschaftCentre National de la Recherche ScientifiqueChinese Academy of SciencesAgence Nationale de la RechercheInstitut des Origines de LyonNew Mexico State UniversityUniversity of PortsmouthScience and Technology Facilities CouncilUniversität BaselUniversity of PittsburghLos Alamos National LaboratoryAlfred P. Sloan FoundationUniversity of WashingtonPrinceton UniversityJohns Hopkins UniversityUniversity of California, RiversideOhio State UniversityCalifornia Institute of TechnologyU.S. Naval ObservatoryU.S. Department of EnergyJet Propulsion LaboratoryFermilabCase Western Reserve UniversityNational Science FoundationDrexel UniversityNational Aeronautics and Space Administration
- Keywords
- PhysicsGalaxySurface brightnessAstrophysicsChandra Deep Field SouthAstronomyStar formation
- Has abstract in OpenAlex
- yes