261 citations · 5k across the 125 of their papers we have counts for
25 papers · 1 filter
Fossil group origins - VI. Global X-ray scaling relations of fossil galaxy clusters
A. Kundert, F. Gastaldello, E. D'Onghia +11
We present the first pointed X-ray observations of 10 candidate fossil galaxy groups and clusters. With these Suzaku observations, we determine global temperatures and bolometric X…
Fossil Groups Origins III. Characterization of the sample and observational properties of fossil systems
S. Zarattini, R. Barrena, M. Girardi +15
(Abridged) Fossil systems are group- or cluster-sized objects whose luminosity is dominated by a very massive central galaxy. In the current cold dark matter scenario, these object…
Fossil Groups Origins III. The relation between optical and X-ray luminosities
M. Girardi, J. A. L. Aguerri, S. De Grandi +11
This study is part of the FOssil Groups Origin (FOGO) project which aims at carrying out a systematic and multiwavelength study of a large sample of fossil systems. Here we focus o…
A Normal Abundance of Faint Satellites in the Fossil Group NGC 6482
S. Lieder, S. Mieske, R. Sánchez-Janssen +3
Fossil groups are considered the end product in a galaxy group's evolution -- a massive central galaxy that dominates the luminosity budget of the group, as the outcome of efficien…
Larger sizes of massive quiescent early-type galaxies in clusters than in the field at 0.8 < z < 1.5
L. Delaye, M. Huertas-Company, S. Mei +13
[abridged] The mass-size relation of early-type galaxies (ETGs) has been largely studied in the last years to probe the mass assembly of the most massive objects in the Universe. I…
The importance of major mergers in the build up of stellar mass in brightest cluster galaxies at z=1
C. Lidman, G. Iacobuta, A. E. Bauer +22
Recent independent results from numerical simulations and observations have shown that brightest cluster galaxies (BCGs) have increased their stellar mass by a factor of almost two…
The relation between bar formation, galaxy luminosity, and environment
E. M. Corsini, J. Mendez-Abreu, R. Sanchez-Janssen +2
We derive the bar fraction in three different environments ranging from the field to Virgo and Coma clusters, covering an unprecedentedly large range of galaxy luminosities (or, eq…
A Virtual Observatory Census to Address Dwarfs Origins. AVOCADO - I. Science goals, sample selection and analysis tools
R. Sánchez-Janssen, R. Amorín, M. García-Vargas +9
(Abridged) AVOCADO aims at establishing firm conclusions on the formation and evolution of dwarf galaxies by constructing and analysing a homogeneous, multiwavelength dataset for a…
The impact of galaxy harassment on the globular cluster systems of early-type cluster dwarf galaxies
Rory Smith, Ruben Sanchez-Janssen, Michael Fellhauer +3
The dynamics of globular cluster systems (GCSs) around galaxies are often used to assess the total enclosed mass, and even to constrain the dark matter distribution. The globular c…
The nature and nurture of bars and disks
J. Mendez-Abreu, R. Sanchez-Janssen, J. A. L. Aguerri +2
The effects that interactions produce on galaxy disks and how they modify the subsequent formation of bars need to be distinguished to fully understand the relationship between bar…
Evidence for Secular Evolution of Disc Structural Parameters in Massive Barred Galaxies
Rubén Sánchez-Janssen, Dimitri A. Gadotti
We address the effects of bar-driven secular evolution in discs by comparing their properties in a sample of nearly 700 unbarred and barred (42 +- 3 per cent of the population) mas…
3D-HST Grism Spectroscopy of a Gravitationally Lensed, Low-metallicity Starburst Galaxy at z=1.847
Gabriel B. Brammer, Ruben Sanchez-Janssen, Ivo Labbe +17
We present Hubble Space Telescope (HST) imaging and spectroscopy of the gravitational lens SL2SJ02176-0513, a cusp arc at z=1.847. The UV continuum of the lensed galaxy is very blu…
Globular cluster systems as tracers of environmental effects on Virgo early-type dwarfs
R. Sánchez-Janssen, J. A. L. Aguerri
Early-type dwarfs (dEs) are by far the most abundant galaxy population in nearby clusters. Whether these objects are primordial, or the recent end-products of the different physica…
Fossil groups origins II. Unveiling the formation of the brightest group galaxies through their scaling relations
J. Mendez-Abreu, J. A. L. Aguerri, R. Barrena +11
(Abridged) Fossil systems are galaxy associations dominated by a relatively isolated, bright elliptical galaxy, surrounded by a group of smaller galaxies lacking L* objects. We ana…
AVOCADO: A Virtual Observatory Census to Address Dwarfs Origins
R. Sanchez-Janssen, R. Amorin, M. Garcia-Vargas +9
Dwarf galaxies are by far the most abundant of all galaxy types, yet their properties are still poorly understood -especially due to the observational challenge that their intrinsi…
Fossil Groups Origins: I. RX J105453.3+552102 a very massive and relaxed system at z~0.5
J. A. L. Aguerri, M. Girardi, W. Boschin +11
The most accepted scenario for the origin of fossil groups (FGs) is that they are galaxy associations in which the merging rate was fast and efficient. These systems have assembled…
Surprises in Image Decomposition of Edge-on Galaxies: does Sombrero have a (classical) bulge?
Dimitri A. Gadotti, Rubén Sánchez-Janssen
The spheroid of the Sombrero galaxy, NGC 4594, is considered a prototype of classical, merger-built bulges. We use a Spitzer, IRAC 3.6 micron image to perform a detailed structural…
On the lack of stellar bars in Coma dwarf galaxies
J. Mendez-Abreu, R. Sanchez-Janssen, J. A. L. Aguerri
We present a study of the bar fraction in the Coma cluster galaxies based on a sample of ~190 galaxies selected from the SDSS-DR6 and observed with the Hubble Space Telescope (HST)…
Thin discs, thick dwarfs, and the importance of feedback effects
R. Sánchez-Janssen, J. Méndez-Abreu, J. A. L. Aguerri
We investigate the role of stellar mass in shaping the intrinsic thickness of faint systems by determining the probability distribution of apparent axis ratios for two different sa…
A Study of Catalogued Nearby Galaxy Clusters in the SDSS-DR4. II. Cluster Substructure
J. Alfonso L. Aguerri, Ruben Sanchez-Janssen
According to the current cosmological paradigm, large scale structures form hierarchically in the Universe. Clusters of galaxies grow through a continuous accretion of mass. Nevert…
Thin discs, thick dwarfs and the effects of stellar feedback
R. Sanchez-Janssen, J. Mendez-Abreu, J. A. L. Aguerri
We investigate the role of stellar mass in shaping the intrinsic thickness of galaxy discs by determining the probability distribution of apparent axis ratios (b/a) for two differe…
Which galaxies host bars and disks? A study of the Coma cluster
J. Mendez-Abreu, R. Sanchez-Janssen, J. A. L. Aguerri
We present a study of the bar fraction in the Coma cluster galaxies based on a sample of galaxies selected from the Sloan Digital Sky Survey Data Release 6 (SDSS-DR6) an…
The influence of the environment on bar formation
J. Mendez-Abreu, J. A. L. Aguerri, S. Zarattini +2
Galaxy mergers and interactions are mechanisms which could drive the formation of bars. Therefore, we could expect that the fraction of barred galaxies increases with the local den…
The bright galaxy population of five medium redshift clusters. II. Quantitative Galaxy Morphology
B. Ascaso, J. A. L Aguerri, M. Moles +2
Aims: Following the study already presented in our previous paper, based on the Nordic Optical Telescope (NOT) sample, which consists of five clusters of galaxies within the redshi…