Antonela Monachesi
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View article: The role of supercluster filaments in shaping galaxy clusters
The role of supercluster filaments in shaping galaxy clusters Open
In a hierarchical ΛCDM Universe, cosmic filaments serve as the primary channels for matter accretion into galaxy clusters, influencing the shape of their dark matter halos. We investigate whether the elongation of galaxy clusters correlate…
View article: Targeting cluster galaxies for the 4MOST CHANCES Low-z sub-survey with photometric redshifts
Targeting cluster galaxies for the 4MOST CHANCES Low-z sub-survey with photometric redshifts Open
The evolution of galaxies is shaped by both internal processes and their external environments. Galaxy clusters and their surroundings provide ideal laboratories to study these effects, particularly mechanisms such as quenching and morphol…
View article: Stars Born in the Wind: M82’s Outflow and Halo Star Formation
Stars Born in the Wind: M82’s Outflow and Halo Star Formation Open
Starburst galaxies, such as M82, launch kiloparsec-scale galactic outflows that interact with the circumgalactic medium (CGM) in complex ways. Apart from enriching the CGM with metals and energy, these outflows may trigger star formation i…
View article: CAPOS: The bulge Cluster APOgee Survey
CAPOS: The bulge Cluster APOgee Survey Open
Context. Bulge globular clusters (BGCs) are exceptional tracers of the formation and chemodynamical evolution of this oldest Galactic component. Until now, observational difficulties have prevented us from taking full advantage of these po…
View article: The Galactic Bulge Exploration. VI. Gaia Enceladus/Sausage RR Lyrae Stars in the Inner-central Stellar Halo of the Milky Way
The Galactic Bulge Exploration. VI. Gaia Enceladus/Sausage RR Lyrae Stars in the Inner-central Stellar Halo of the Milky Way Open
We present a view of the stellar halo in the inner-central regions of the Milky Way ( R ≲ 10 kpc) mapped by RR Lyrae stars. The combined BRAVA-RR/APOGEE RR Lyrae catalog is used to obtain a sample of 281 RR Lyrae stars located in the bulge…
View article: An integral field spectroscopic study of stellar and ionized gas properties around edge-on disc galaxies in the stellar mass range 9 &lt; log <i>M</i>* &lt; 11
An integral field spectroscopic study of stellar and ionized gas properties around edge-on disc galaxies in the stellar mass range 9 < log <i>M</i>* < 11 Open
We analyse the stellar light, 4000 Å break and emission line profiles of 82 edge-on disc galaxies from the Mapping Nearby Galaxies at APO (MaNGA) survey. We characterize the stellar light profiles perpendicular to the disc plane using two …
View article: The Star Formation History and Evolution of the Ultra-Diffuse M81 Satellite, F8D1
The Star Formation History and Evolution of the Ultra-Diffuse M81 Satellite, F8D1 Open
We present deep HST imaging of one of the nearest ultra-diffuse galaxies (UDGs) outside of the Local Group: F8D1, a satellite of M81 known to be tidally disrupting. UDGs are an enigmatic and diverse population, with evolutionary pathways r…
View article: The Galactic Bulge exploration VI.: Gaia Enceladus/Sausage RR Lyrae stars in the inner-central stellar halo of the Milky Way
The Galactic Bulge exploration VI.: Gaia Enceladus/Sausage RR Lyrae stars in the inner-central stellar halo of the Milky Way Open
We present a view of the stellar halo in the inner-central regions of the Milky Way (R <~ 10 kpc) mapped by RR Lyrae stars. The combined BRAVA-RR/APOGEE RR Lyrae catalog is used to obtain a sample of 281 RR Lyrae stars located in the bulge…
View article: The formation and evolution of supermassive disks in IllustrisTNG
The formation and evolution of supermassive disks in IllustrisTNG Open
Context. Supermassive disks are outstanding galaxies whose formation and evolution are still poorly understood. They comprise a large variety of objects, from large low-surface brightness galaxies such as Malin-1 to the most spectacular su…
View article: The role of accreted and in situ populations in shaping the stellar halos of low-mass galaxies
The role of accreted and in situ populations in shaping the stellar halos of low-mass galaxies Open
Context. The stellar halos of low-mass galaxies ( M * ≤ 10 10 M ⊙ ) are becoming objects of interest among the extragalactic community due to a recent set of observations with the capacity to detect such structures. Additionally, new and v…
View article: Tracing the origins of galaxy lopsidedness across cosmic time
Tracing the origins of galaxy lopsidedness across cosmic time Open
Context. Current studies of large-scale asymmetries (i.e., lopsidedness) in the stellar density distribution of disk galaxies have mainly focused on the Local Universe. However, recent observations have found a significant fraction (over 6…
View article: Galaxy evolution in compact groups
Galaxy evolution in compact groups Open
Compact groups (CGs) of galaxies are an extreme environment for the morphological transformations and the cessation of star formation in galaxies. However, despite initially being conceived as isolated systems, it is now widely recognised …
View article: Andromeda XXXV: The Faintest Dwarf Satellite of the Andromeda Galaxy
Andromeda XXXV: The Faintest Dwarf Satellite of the Andromeda Galaxy Open
We present the discovery of Andromeda XXXV, the faintest Andromeda satellite galaxy discovered to date, identified as an overdensity of stars in the Pan-Andromeda Archaeological Survey and confirmed via Hubble Space Telescope imaging. Loca…
View article: Progenitor Diversity in the Accreted Stellar Halos of Milky Way–like Galaxies
Progenitor Diversity in the Accreted Stellar Halos of Milky Way–like Galaxies Open
Ongoing large stellar spectroscopic surveys of the Milky Way seek to reconstruct the major events in the assembly history of the Galaxy. Chemical and kinematic observations can be used to separate the contributions of different progenitor …
View article: Unveiling the formation channels of stellar halos through their chemical fingerprints
Unveiling the formation channels of stellar halos through their chemical fingerprints Open
Stellar halos around galaxies contain key information about their formation and assembly history. Using simulations, we can trace the origins of different stellar populations in these halos, contributing to our understanding of galaxy evol…
View article: Unveiling the formation channels of stellar halos through their chemical fingerprints
Unveiling the formation channels of stellar halos through their chemical fingerprints Open
Context. Stellar halos around galaxies contain key information about their formation and assembly history. Using simulations, we can trace the origins of different stellar populations in these halos, contributing to our understanding of ga…
View article: The role of accreted and in situ populations in shaping the stellar halos of low-mass galaxies
The role of accreted and in situ populations in shaping the stellar halos of low-mass galaxies Open
The stellar halos of dwarf galaxies are becoming an object of interest in the extragalactic community due to their detection in some recent observations. Additionally, new cosmological simulations of very high resolution were performed, al…
View article: Exploring the Diversity of Faint Satellites in the M81 Group
Exploring the Diversity of Faint Satellites in the M81 Group Open
In the last decade, we have been able to probe further down the galaxy luminosity function than ever before and expand into the regime of ultra-faint dwarfs (UFDs), which are some of the best probes we have of small-scale cosmology and gal…
View article: Tracing the origins of galaxy lopsidedness across cosmic time
Tracing the origins of galaxy lopsidedness across cosmic time Open
Current studies of large-scale asymmetries (i.e. lopsidedness) in the stellar density distribution of disk galaxies have mainly focused on the local Universe. Recent observations have found a significant fraction (over 60%) of lopsided gal…
View article: CHANCES, the Chilean Cluster Galaxy Evolution Survey: Selection and initial characterisation of clusters and superclusters
CHANCES, the Chilean Cluster Galaxy Evolution Survey: Selection and initial characterisation of clusters and superclusters Open
CHANCES, the CHileAN Cluster galaxy Evolution Survey, will study the evolution of galaxies in and around 100 massive galaxy clusters from the local Universe out to $z = 0.45$, and two superclusters at $z \sim 0.05$ that contain roughly 25 …
View article: Progenitor diversity in the accreted stellar halos of Milky Way-like galaxies
Progenitor diversity in the accreted stellar halos of Milky Way-like galaxies Open
Ongoing large stellar spectroscopic surveys of the Milky Way seek to reconstruct the major events in the assembly history of the Galaxy. Chemical and kinematic observations can be used to separate the contributions of different progenitor …
View article: A Timeline of the M81 Group: Properties of the Extended Structures of M82 and NGC 3077
A Timeline of the M81 Group: Properties of the Extended Structures of M82 and NGC 3077 Open
Mergers of and interactions between galaxies imprint a wide diversity of morphological, dynamical, and chemical characteristics in stellar halos and tidal streams. Measuring these characteristics elucidates aspects of the progenitors of th…
View article: A Timeline of the M81 Group: Properties of the Extended Structures of M82 and NGC 3077
A Timeline of the M81 Group: Properties of the Extended Structures of M82 and NGC 3077 Open
Mergers of and interactions between galaxies imprint a wide diversity of morphological, dynamical, and chemical characteristics in stellar halos and tidal streams. Measuring these characteristics elucidates aspects of the progenitors of th…
View article: First resolved stellar halo kinematics of a Milky Way-mass galaxy outside the Local Group: The flat counter-rotating halo in NGC 4945
First resolved stellar halo kinematics of a Milky Way-mass galaxy outside the Local Group: The flat counter-rotating halo in NGC 4945 Open
The stellar halos of galaxies, primarily formed through the accretion and merger of smaller objects, are an important tool for understanding the hierarchical mass assembly of galaxies. However, the inner regions of stellar halos in disk ga…
View article: First resolved stellar halo kinematics of a MW-mass galaxy outside the Local Group: A flat counter-rotating halo in NGC 4945
First resolved stellar halo kinematics of a MW-mass galaxy outside the Local Group: A flat counter-rotating halo in NGC 4945 Open
Stellar halos of galaxies, primarily formed through the accretion of smaller objects, are important to understand the hierarchical mass assembly of galaxies. However, the inner regions of stellar halos in disk galaxies are predicted to hav…
View article: Galaxy evolution in compact groups II. Witnessing the influence of major structures in their evolution
Galaxy evolution in compact groups II. Witnessing the influence of major structures in their evolution Open
Compact groups (CGs) of galaxies are extreme environments for morphological transformations and the cessation of star formation. Though initially considered isolated, it is now recognised that many CGs are embedded in larger structures. We…
View article: Exploring the origin of the distance bimodality of stars in the periphery of the Small Magellanic Cloud with APOGEE and <i>Gaia</i>
Exploring the origin of the distance bimodality of stars in the periphery of the Small Magellanic Cloud with APOGEE and <i>Gaia</i> Open
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, three-body interaction …
View article: Bulge–disc decomposition of the Hydra cluster galaxies in 12 bands
Bulge–disc decomposition of the Hydra cluster galaxies in 12 bands Open
When a galaxy falls into a cluster, its outermost parts are the most affected by the environment. In this paper, we are interested in studying the influence of a dense environment on different galaxy’s components to better understand how t…
View article: Bulge-disc decomposition of the Hydra cluster galaxies in 12 bands
Bulge-disc decomposition of the Hydra cluster galaxies in 12 bands Open
When a galaxy falls into a cluster, its outermost parts are the most affected by the environment. In this paper, we are interested in studying the influence of a dense environment on different galaxy's components to better understand how t…
View article: CAPOS: The bulge Cluster APOgee Survey IV. Elemental Abundances of the bulge globular cluster NGC 6558
CAPOS: The bulge Cluster APOgee Survey IV. Elemental Abundances of the bulge globular cluster NGC 6558 Open
This study presents the results concerning six red giant stars members of the globular cluster NGC 6558. Our analysis utilized high-resolution near-infrared spectra obtained through the CAPOS initiative (the APOgee Survey of Clusters in th…