VEGAS: A VST Early-type GAlaxy Survey. II. Photometric study of giant ellipticals and their stellar halos
Marilena Spavone,Massimo Capaccioli,Massimo Capaccioli,Nicola R. Napolitano,Enrichetta Iodice,Aniello Grado,Luca Limatola,Andrew Cooper,Michele Cantiello,Michele Cantiello,Duncan A. Forbes,Maurizio Paolillo,Pietro Schipani +12 more
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TLDR
In this article, the authors investigate the photometric properties of six massive early type galaxies (ETGs) in the VEGAS sample (NGC 1399, NGC 3923 and NGC 4365), out to extremely low surface brightness levels, with the goal of characterizing the global structure of their light profiles for comparison to state-of-theart galaxy formation models.Abstract:
Observations of diffuse starlight in the outskirts of galaxies are thought to be a fundamental source of constraints on the cosmological context of galaxy assembly in the $\Lambda$CDM model. Such observations are not trivial because of the extreme faintness of such regions. In this work, we investigate the photometric properties of six massive early type galaxies (ETGs) in the VEGAS sample (NGC 1399, NGC 3923, NGC 4365, NGC 4472, NGC 5044, and NGC 5846) out to extremely low surface brightness levels, with the goal of characterizing the global structure of their light profiles for comparison to state-of-the-art galaxy formation models. We carry out deep and detailed photometric mapping of our ETG sample taking advantage of deep imaging with VST/OmegaCAM in the g and i bands. By fitting the light profiles, and comparing the results to simulations of elliptical galaxy assembly, we identify signatures of a transition between "relaxed" and "unrelaxed" accreted components and can constrain the balance between in situ and accreted stars. The very good agreement of our results with predictions from theoretical simulations demonstrates that the full VEGAS sample of $\sim 100$ ETGs will allow us to use the distribution of diffuse light as a robust statistical probe of the hierarchical assembly of massive galaxies.read more
Citations
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Individual stellar haloes of massive galaxies measured to 100 kpc at 0.3 < z < 0.5 using Hyper Suprime-Cam
Song Huang,Song Huang,Alexie Leauthaud,Alexie Leauthaud,Jenny E. Greene,Kevin Bundy,Kevin Bundy,Yen-Ting Lin,Masayuki Tanaka,Satoshi Miyazaki,Yutaka Komiyama +10 more
TL;DR: In this article, the stellar halos of a sample of more than 3000 galaxies at 0.3 11.4$ were used to estimate surface mass density profiles to 100 kpc without stacking.
Journal ArticleDOI
The Fornax Deep Survey with the VST. IV. A size and magnitude limited catalog of dwarf galaxies in the area of the Fornax cluster
Aku Venhola,Reynier Peletier,Eija Laurikainen,Heikki Salo,Enrichetta Iodice,Steffen Mieske,M. Hilker,Carolin Wittmann,Thorsten Lisker,Maurizio Paolillo,Maurizio Paolillo,Michele Cantiello,Joachim Janz,Joachim Janz,Marilena Spavone,Raffaele D'Abrusco,Glenn van de Ven,Glenn van de Ven,Nicola R. Napolitano,Gijs Verdoes Kleijn,Natasha Maddox,Massimo Capaccioli,A. Grado,Edwin A. Valentijn,Jesús Falcón-Barroso,Jesús Falcón-Barroso,L. Limatola +26 more
TL;DR: The Fornax Deep Survey (FDS) dwarf galaxy catalog as discussed by the authors was used to study the galaxies down to r'-band magnitude m(r') approximate to 21 mag (M-r' approximate to -10.5 mag), which opens a new parameter regime to investigate the evolution of dwarf galaxies in the cluster environment.
Journal ArticleDOI
Fornax3D project: Overall goals, galaxy sample, MUSE data analysis, and initial results
Marc Sarzi,E. Iodice,Lodovico Coccato,Enrico Maria Corsini,P. T. de Zeeuw,Jesús Falcón-Barroso,Dimitri A. Gadotti,Mariya Lyubenova,Richard M. McDermid,G. van de Ven,Katja Fahrion,A. Pizzella,Ling Zhu +12 more
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The Fornax3D project: overall goals, galaxy sample, MUSE data analysis and initial results
Marc Sarzi,Enrica Iodice,Lodovico Coccato,Enrico Maria Corsini,P. T. de Zeeuw,Jesús Falcón-Barroso,Dimitri A. Gadotti,Mariya Lyubenova,Richard M. McDermid,G. van de Ven,K. Fahrion,Alessandro Pizzella,L. Zhu +12 more
TL;DR: In this paper, high-quality integral-field spectroscopic data were obtained for the inner regions of all the bright galaxies within the virial radius of Fornax, and the stellar haloes of early-type galaxies were also covered out to about four effective radii.
Journal ArticleDOI
Intracluster Patches of Baryons in the Core of the Fornax Cluster
E. Iodice,Marilena Spavone,Michele Cantiello,Raffaele D'Abrusco,Massimo Capaccioli,Michael Hilker,Steffen Mieske,Nicola R. Napolitano,Reynier Peletier,L. Limatola,A. Grado,Aku Venhola,Maurizio Paolillo,G. van de Ven,Pietro Schipani +14 more
TL;DR: In the core of the Fornax cluster, on the west side of NGC 1399, a previously unknown region of intracluster light (ICL) was detected by several faint patches of diffuse light as discussed by the authors.
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