Publications (93)
A tale of two galaxies: light and mass in NGC891 and NGC7814
Filippo Fraternali, Renzo Sancisi, Peter Kamphuis
The two edge-on galaxies NGC891 and NGC7814 are representative of two extreme morphologies: the former is disk-dominated while the latter is almost entirely bulge-dominated. It has…
The density of the Milky Way's corona at through ram pressure stripping of the Draco dSph galaxy
Asger Grønnow, Filippo Fraternali, Federico Marinacci +4
Satellite galaxies within the Milky Way's (MW) virial radius are typically devoid of cold gas due to ram pressure stripping by the MW's corona. The density of th…
A multi-wavelength study of a massive, active galaxy at : coupling the kinematics of the ionized and molecular gas
Federica Loiacono, Margherita Talia, Filippo Fraternali +3
We report a multi-wavelength study of the massive (), star-forming galaxy GMASS 0953, which hosts an obscured AGN. We combined n…
The baryonic specific angular momentum of disc galaxies
Pavel E. Mancera Piña, Lorenzo Posti, Filippo Fraternali +2
(Abridged) Specific angular momentum is one of the key parameters that control the evolution of galaxies. We derive the baryonic specific angular momentum of disc galaxies and stud…
Baryon dominated ultra-diffuse galaxies
Pavel E. Mancera Piña, Filippo Fraternali, Elizabeth A. K. Adams +1
By means of interferometic 21-cm observations and a 3D kinematic modeling technique, we study the gas kinematics of six HI-rich ultra-diffuse galaxies (UDGs). We derive robust circ…
Gas circulation and galaxy evolution
Filippo Fraternali
Galaxies must form and evolve via the acquisition of gas from the intergalactic environment, however the way this gas accretion takes place is still poorly understood. Star-forming…
High Velocity Gas in the Halos of Spiral Galaxies
Filippo Fraternali, Tom Oosterloo, Rense Boomsma +2
Recent, high sensitivity, HI observations of nearby spiral galaxies show that their thin `cold' disks are surrounded by thick layers (halos) of neutral gas with anomalous kinematic…
Efficiency of Thermal Conduction in a Magnetised Circumgalactic Medium
Richard Kooij, Asger Grønnow, Filippo Fraternali
The large temperature difference between cold gas clouds around galaxies and the hot halos that they are moving through suggests that thermal conduction could play an important rol…
The HI halo of NGC 2403
Filippo Fraternali, Tom Oosterloo, Renzo Sancisi +1
Deep VLA HI observations of the nearby spiral galaxy NGC 2403 reveal the presence of an extended HI halo that shows slower rotation and a general inflow (about 15-25 km\s) towards…
Dynamical properties of z dusty star-forming galaxies and their connection with local early type galaxies
Francesca Rizzo, Simona Vegetti, Filippo Fraternali +2
There is a large consensus that gas in high- galaxies is highly turbulent, because of a combination of stellar feedback processes and gravitational instabilities driven by merge…
Accretion of gas onto nearby spiral galaxies
Filippo Fraternali, James Binney
We present evidence for cosmological gas accretion onto spiral galaxies in the local universe. The accretion is seen through its effects on the dynamics of the extra-planar neutral…
Cool circumgalactic gas of passive galaxies from cosmological inflow
Andrea Afruni, Filippo Fraternali, Gabriele Pezzulli
The circumgalactic medium (CGM) of galaxies consists of a multiphase gas with components at very different temperatures, from K to K. One of the greatest puzzle…
LITTLE THINGS in 3D: robust determination of the circular velocity of dwarf irregular galaxies
Giuliano Iorio, Filippo Fraternali, Carlo Nipoti +3
Dwarf Irregular galaxies (dIrrs) are the smallest stellar systems with extended HI discs. The study of the kinematics of such discs is a powerful tool to estimate the total matter…
A massive stellar bulge in a regularly rotating galaxy 1.2 billion years after the Big Bang
Federico Lelli, Enrico M. Di Teodoro, Filippo Fraternali +5
Cosmological models predict that galaxies forming in the early Universe experience a chaotic phase of gas accretion and star formation, followed by gas ejection due to feedback pro…
Comment on "Evidence for dark matter in the inner Milky Way"
Stacy McGaugh, Federico Lelli, Marcel Pawlowski +21
This is a brief rebuttal to arXiv:1502.03821, which claims to provide the first observational proof of dark matter interior to the solar circle. We point out that this result is no…
A Dynamical Model for the Extra-planar Gas in Spiral Galaxies
Filippo Fraternali, James Binney
Recent HI observations reveal that the discs of spiral galaxies are surrounded by extended gaseous haloes. This extra-planar gas reaches large distances (several kpc) from the disc…
Prolate rotation and metallicity gradient in the transforming dwarf galaxy Phoenix
Nikolay Kacharov, Giuseppina Battaglia, Marina Rejkuba +7
Transition type dwarf galaxies are thought to be systems undergoing the process of transformation from a star-forming into a passively evolving dwarf, which makes them particularly…
A scaling-relation for disc galaxies: circular-velocity gradient versus central surface brightness
Federico Lelli, Filippo Fraternali, Marc Verheijen
For disc galaxies, a close relation exists between the distribution of light and the shape of the rotation curve. We quantify this relation by measuring the inner circular-velocity…
Tracing the Energetic Outflows from Galactic Nuclei: Observational Evidence for a Large-Scale Bipolar Radio and X-ray-emitting Bubble-like Structure in M106
Yuxuan Zeng, Q. Daniel Wang, Filippo Fraternali
The role of energetic outflows from galactic nuclei in shaping galaxy formation and evolution is still shrouded in uncertainty. In this study, we shed light on this complex phenome…
Temperature asymmetry in the Milky Way's hot circumgalactic medium induced by the Magellanic Clouds
Alexandru Oprea, Filippo Fraternali, Else Starkenburg +2
The Milky Way is surrounded by a hot diffuse circumgalactic medium (CGM) with temperatures of millions of degrees. Recent X-ray observations with the eROSITA satellite discovered a…
Accretion by the Galaxy
James Binney, Filippo Fraternali
Cosmology requires at least half of the baryons in the Universe to be in the intergalactic medium, much of which is believed to form hot coronae around galaxies. Star-forming galax…
Dynamics of Starbursting Dwarf Galaxies: I Zw 18
Federico Lelli, Marc Verheijen, Filippo Fraternali +1
I Zw 18 is a prototype Blue Compact Dwarf (BCD), characterized by a strong starburst and extremely low metallicity (Z ~ 0.02 Zsun). It has long been considered a candidate young ga…
Evidence for supernova feedback sustaining gas turbulence in nearby star-forming galaxies
Cecilia Bacchini, Filippo Fraternali, Giuliano Iorio +3
It is well known that gas in galaxy discs is highly turbulent, but there is much debate on which mechanism can energetically maintain this turbulence. Among the possible candidates…
HALOGAS Observations of NGC 4559: Anomalous and Extra-planar HI and its Relation to Star Formation
Carlos J. Vargas, George Heald, Rene A. M. Walterbos +6
We use new deep 21 cm HI observations of the moderately inclined galaxy NGC 4559 in the HALOGAS survey to investigate the properties of extra-planar gas. We use TiRiFiC to construc…
The Bright and the Dark Side of Malin 1
Renzo Sancisi, Filippo Fraternali
Malin 1 has long been considered a prototype giant, dark matter dominated Low Surface Brightness galaxy. Two recent studies, one based on a re-analysis of VLA HI observations and t…
A Kinematic Analysis of Ionised Extraplanar Gas in the Spiral Galaxies NGC 3982 and NGC 4152
Anqi Li, Antonino Marasco, Filippo Fraternali +2
We present a kinematic study of ionised extraplanar gas in two low-inclination late-type galaxies (NGC 3982 and NGC 4152) using integral field spectroscopy data from the DiskMass H…
Robust HI kinematics of gas-rich ultra-diffuse galaxies: hints of a weak-feedback formation scenario
Pavel E. Mancera Piña, Filippo Fraternali, Kyle A. Oman +15
We study the gas kinematics of a sample of six isolated gas-rich low surface brightness galaxies, of the class called ultra-diffuse galaxies (UDGs). These galaxies have recently be…
Introduction to Galaxy Formation and Evolution. From Primordial Gas to Present-Day Galaxies
Andrea Cimatti, Filippo Fraternali, Carlo Nipoti
Present-day elliptical, spiral and irregular galaxies are large systems made of stars, gas and dark matter. Their properties result from a variety of physical processes that have o…
Galaxy spin as a formation probe: the stellar-to-halo specific angular momentum relation
Lorenzo Posti, Gabriele Pezzulli, Filippo Fraternali +1
We derive the stellar-to-halo specific angular momentum relation (SHSAMR) of galaxies at by combining i) the standard CDM tidal torque theory ii) the observed relation be…
Dynamically cold discs in high-redshift galaxies: comparison between ALMA observations and TNG50
Yi He, Qi Guo, Filippo Fraternali +2
Observations of highly rotationally supported gas discs in high redshift ( > 3) star-forming galaxies challenge our understanding of galaxy formation, as the prevailing view hol…
Gas Accretion via Condensation and Fountains
Filippo Fraternali
For most of their lives, galaxies are surrounded by large and massive coronae of hot gas, which constitute vast reservoirs for gas accretion. This Chapter describes a mechanism tha…
Ionized absorbers as evidence for supernova-driven cooling of the lower Galactic corona
Filippo Fraternali, Antonino Marasco, Federico Marinacci +1
We show that the ultraviolet absorption features, newly discovered in HST spectra, are consistent with being formed in a layer that extends a few kpc above the disk of the Milky Wa…
Clouds, Streams and Bridges. Redrawing the blueprint of the Magellanic System with Gaia DR1
Vasily Belokurov, Denis Erkal, Alis J. Deason +5
We present the discovery of stellar tidal tails around the Large and the Small Magellanic Clouds in the Gaia DR1 data. In between the Clouds, their tidal arms are stretched towards…
Extra-planar HI in the starburst galaxy NGC 253
Rense Boomsma, Tom Oosterloo, Filippo Fraternali +2
Observations of the nearby starburst galaxy NGC 253 in the 21-cm line reveal the presence of neutral hydrogen in the halo, up to 12 kpc from the galactic plane. This extra-planar H…
The effect of stellar feedback on a Milky Way-like galaxy and its gaseous halo
Antonino Marasco, Victor P. Debattista, Filippo Fraternali +4
We present the study of a set of N-body+SPH simulations of a Milky Way-like system produced by the radiative cooling of hot gas embedded in a dark matter halo. The galaxy and its g…
The triggering of starbursts in low-mass galaxies
Federico Lelli, Marc Verheijen, Filippo Fraternali
Strong bursts of star formation in galaxies may be triggered either by internal or external mechanisms. We study the distribution and kinematics of the HI gas in the outer regions…
The instantaneous radial growth rate of stellar discs
Gabriele Pezzulli, Filippo Fraternali, Samuel Boissier +1
We present a new and simple method to measure the instantaneous mass and radial growth rates of the stellar discs of spiral galaxies, based on their star formation rate surface den…
Holes and high velocity HI in NGC 6946
Rense Boomsma, Tom Oosterloo, Thijs van der Hulst +2
We are studying the properties of the holes and the high velocity gas in NGC 6946. Here we present some puzzling results.
The long life of ultra diffuse galaxies inside low-density dark matter halos: the case of AGC 114905
Andrea Afruni, Federico Marinacci, Pavel E. Mancera Piña +1
It has long been known that, in the absence of a dark matter (DM) halo, galaxy discs tend to develop global gravitational instabilities that strongly modify their initial structure…
Clouds accreting from the IGM are not able to feed the star formation of low-redshift disc galaxies
Andrea Afruni, Gabriele Pezzulli, Filippo Fraternali +1
Galactic halos accrete material from the intergalactic medium (IGM) and part of this accretion is expected to be in the form of cool ( K) gas. A signature of this proces…
Volumetric star formation laws of disc galaxies
Cecilia Bacchini, Filippo Fraternali, Giuliano Iorio +1
Star formation (SF) laws are fundamental relations between the gas content of a galaxy and its star formation rate (SFR) and play key roles in galaxy evolution models. In this pape…
The volumetric star formation law for nearby galaxies -- Extension to dwarf galaxies and low-density regions
Cecilia Bacchini, Filippo Fraternali, Gabriele Pezzulli +1
In the last decades, much effort has been put into finding the star formation law which could unequivocally link the gas and the star formation rate (SFR) densities measured on sub…
The angular momentum of cosmological coronae and the inside-out growth of spiral galaxies
Gabriele Pezzulli, Filippo Fraternali, James Binney
Massive and diffuse haloes of hot gas (coronae) are important intermediaries between cosmology and galaxy evolution, storing mass and angular momentum acquired from the cosmic web…
A tight angular-momentum plane for disc galaxies
Pavel E. Mancera Piña, Lorenzo Posti, Gabriele Pezzulli +4
The relations between the specific angular momenta () and masses () of galaxies are often used as a benchmark in analytic models and hydrodynamical simulations as they are co…
Photometry and kinematics of dwarf galaxies from the Apertif HI survey
Barbara Å iljeg, Elizabeth A. K. Adams, Filippo Fraternali +13
Context. Understanding the dwarf galaxy population in low density environments is crucial for testing the LCDM cosmological model. The increase in diversity towards low mass galaxi…
How can star formation be sustained?
Filippo Fraternali
There is overwhelming evidence that the Milky Way has formed its stars at a rel- atively constant rate throughout the Hubble time. This implies that its stock of cold gas was not i…
The cold gaseous halo of NGC 891
Tom Oosterloo, Filippo Fraternali, Renzo Sancisi
We present HI observations of the edge-on galaxy NGC 891. These are among the deepest ever performed on an external galaxy. They reveal a huge gaseous halo, much more extended than…
Galaxy disc scaling relations: A tight linear galaxy -- halo connection challenges abundance matching
Lorenzo Posti, Antonino Marasco, Filippo Fraternali +1
In CDM cosmology, to first order, galaxies form out of the cooling of baryons within the virial radius of their dark matter halo. The fractions of mass and angular momentum ret…
Peak star formation efficiency and no missing baryons in massive spirals
Lorenzo Posti, Filippo Fraternali, Antonino Marasco
It is commonly believed that galaxies use, throughout the Hubble time, a very small fraction of the baryons associated to their dark matter halos to form stars. This so-called low…
A novel 3D technique to study the kinematics of lensed galaxies
Francesca Rizzo, Simona Vegetti, Filippo Fraternali +1
We present a 3D Bayesian method to model the kinematics of strongly lensed galaxies from spatially-resolved emission-line observations. This technique enables us to simultaneously…
The impact of gas disc flaring on rotation curve decomposition and revisiting baryonic and dark-matter relations for nearby galaxies
Pavel E. Mancera Piña, Filippo Fraternali, Tom Oosterloo +4
Gas discs of late-type galaxies are flared, with scale heights increasing with the distance from the galaxy centres and often reaching kpc scales. We study the effects of gas disc…
3D-Barolo: a new 3D algorithm to derive rotation curves of galaxies
Enrico Di Teodoro, Filippo Fraternali
We present 3D-Barolo, a new code that derives rotation curves of galaxies from emission-line observations. This software fits 3D tilted-ring models to spectroscopic data-cubes and…
Diffuse X-ray emission from the spiral galaxy NGC 2403 discovered with Chandra
Filippo Fraternali, Massimo Cappi, Renzo Sancisi +1
We have detected diffuse soft X-ray emission (0.4-1 keV) from the disk of the spiral galaxy NGC 2403 with Chandra. This diffuse emission (with a total luminosity of 2.1 x 10^38 erg…
How axi-symmetric is the inner HI disc of the Milky Way?
Antonino Marasco, Filippo Fraternali
We modelled the distribution and the kinematics of HI in the inner Milky Way (R<Rsun) at latitude b=0° assuming axi-symmetry. We fitted the line profiles of the LAB 21-cm survey u…
Kinematics of the Ionised Gas in the Spiral Galaxy NGC 2403
Filippo Fraternali, Tom Oosterloo, Renzo Sancisi
We present a study of the kinematics of the ionised gas in the nearby spiral galaxy NGC 2403 using deep long-slit spectra obtained with the 4.2-m William Herschel Telescope. The da…
Not so-dark: High resolution HI imaging of J0139+4328 and identification of an optical counterpart
Barbara Å iljeg, Elizabeth A. K. Adams, Tom A. Oosterloo +4
Dark galaxies - systems rich in neutral hydrogen (HI) gas but with no stars - are a common prediction of numerous theoretical models and cosmological simulations. However, the uneq…
Most of the cool CGM of star-forming galaxies is not produced by supernova feedback
Andrea Afruni, Filippo Fraternali, Gabriele Pezzulli
The characterization of the large amount of gas residing in the galaxy halos, the so called circumgalactic medium (CGM), is crucial to understand galaxy evolution across cosmic tim…
Gas accretion from minor mergers in local spiral galaxies
Enrico Di Teodoro, Filippo Fraternali
In this paper we quantify the gas accretion rate from minor mergers onto star-forming galaxies in the Local Universe using HI observations of 148 nearby spiral galaxies (WHISP samp…
Dynamics of Starbursting Dwarf Galaxies. II. UGC 4483
Federico Lelli, Marc Verheijen, Filippo Fraternali +1
UGC 4483 is a nearby Blue Compact Dwarf (BCD) galaxy. HST observations have resolved the galaxy into single stars and this has led to the derivation of its star formation history a…
Dynamics of Starbursting Dwarf Galaxies. III. A HI study of 18 nearby objects
Federico Lelli, Marc Verheijen, Filippo Fraternali
We investigate the dynamics of starbursting dwarf galaxies, using both new and archival HI observations. We consider 18 nearby galaxies that have been resolved into single stars by…
The extra-planar neutral gas in the edge-on spiral galaxy NGC 891
Filippo Fraternali, Tom Oosterloo, Renzo Sancisi +1
We present neutral hydrogen observations of the nearby edge-on spiral galaxy NGC891 which show extended extra-planar emission up to distances of 15 kpc from the plane. 3D modeling…
Angular Momentum Accretion onto Disc Galaxies
Filippo Fraternali, Gabriele Pezzulli
Throughout the Hubble time, gas makes its way from the intergalactic medium into galaxies fuelling their star formation and promoting their growth. One of the key properties of the…
Off the baryonic Tully-Fisher relation: a population of baryon-dominated ultra-diffuse galaxies
Pavel E. Mancera Piña, Filippo Fraternali, Elizabeth A. K. Adams +17
We study the gas kinematics traced by the 21-cm emission of a sample of six HIrich low surface brightness galaxies classified as ultra-diffuse galaxies (UDGs). Using the 3D kine…
VLA Imaging of HI-bearing Ultra-Diffuse Galaxies from the ALFALFA Survey
Lexi Gault, Lukas Leisman, Elizabeth A. K. Adams +12
Ultra-diffuse galaxies have generated significant interest due to their large optical extents and low optical surface brightnesses, which challenge galaxy formation models. Here we…
Accretion, radial flows and abundance gradients in spiral galaxies
Gabriele Pezzulli, Filippo Fraternali
The metal-poor gas continuously accreting onto the discs of spiral galaxies is unlikely to arrive from the intergalactic medium (IGM) with exactly the same rotation velocity as the…
The Westerbork Hydrogen Accretion in Local Galaxies (HALOGAS) Survey I. Survey Description and Pilot Observations
George Heald, Gyula Jozsa, Paolo Serra +7
We introduce a new, very deep neutral hydrogen (HI) survey being performed with the Westerbork Synthesis Radio Telescope (WSRT). The Westerbork Hydrogen Accretion in LOcal GAlaxieS…
Fountain-driven gas accretion feeding star formation over the disc of NGC 2403
Anqi Li, Filippo Fraternali, Antonino Marasco +4
We use a dynamical model of galactic fountain to study the neutral extraplanar gas (EPG) in the nearby spiral galaxy NGC 2403. We have modelled the EPG as a combination of material…
Deep H I Survey of the Spiral Galaxy NGC 2403
Filippo Fraternali, Gustaaf van Moorsel, Renzo Sancisi +1
High sensitivity H I observations of the nearby spiral galaxy NGC 2403 obtained with the VLA are presented and discussed. The properties of the extended, differentially rotating H…
Regular rotation and low turbulence in a diverse sample of z ~ 4.5 galaxies observed with ALMA
Fernanda Roman-Oliveira, Filippo Fraternali, Francesca Rizzo
The discovery of galaxies with regularly rotating discs at redshifts has been a puzzling challenge to galaxy formation models that tend to predict chaotic gas kinematics in…
The angular momentum-mass relation: a fundamental law from dwarf irregulars to massive spirals
Lorenzo Posti, Filippo Fraternali, Enrico di Teodoro +1
In a CDM Universe, the specific stellar angular momentum () and stellar mass () of a galaxy are correlated as a consequence of the scaling existing for dark mat…
Estimating gas accretion in disc galaxies using the Kennicutt-Schmidt law
Filippo Fraternali, Matteo Tomassetti
We show how the existence of a relation between the star formation rate and the gas density, i.e. the Kennicutt-Schmidt law, implies a continuous accretion of fresh gas from the en…
Evolution of dwarf galaxies: a dynamical perspective
Federico Lelli, Filippo Fraternali, Marc Verheijen
For a rotating galaxy, the inner circular-velocity gradient d_{R}V(0) provides a direct estimate of the central dynamical mass density, including gas, stars, and dark matter. We co…
The HI halos of spiral galaxies
Renzo Sancisi, Filippo Fraternali, Tom Oosterloo +1
The results of observational studies on the vertical HI density distribution and kinematics of the disks of spiral galaxies are reported and discussed. Attention is drawn to the pr…
Neutral versus ionized gas kinematics at z~2.6: The AGN-host starburst galaxy PKS 0529-549
Federico Lelli, Carlos De Breuck, Theresa Falkendal +4
We present a multiwavelength study of the AGN-host starburst galaxy PKS 0529-549 at z~2.6. We use (1) new ALMA observations of the dust continuum and of the [CI] 370 um line, traci…
A new, kinematically anomalous HI component in the spiral galaxy NGC 2403
Filippo Fraternali, Tom Oosterloo, Renzo Sancisi +1
We discuss new, high sensitivity HI observations of the spiral galaxy NGC2403 which show extended emission at anomalous velocities with respect to the `cold' disk. This `anomalous'…
The role of the halo magnetic field on accretion through High-Velocity Clouds
Asger Grønnow, Thor Tepper-GarcÃa, Joss Bland-Hawthorn +1
High-Velocity Clouds (HVCs) are believed to be an important source of gas accretion for star formation in the Milky Way. Earlier numerical studies have found that the Galactic magn…
Inflow of low-metallicity cool gas in the halo of the Andromeda galaxy
Andrea Afruni, Gabriele Pezzulli, Filippo Fraternali
As the closest galaxy to our own Milky Way, the Andromeda galaxy (M31) is an ideal laboratory for studies of galaxy evolution. The AMIGA project has recently provided ob…
The Odd Dark Matter Halos of Isolated Gas-rich Ultradiffuse Galaxies
Demao Kong, Manoj Kaplinghat, Hai-Bo Yu +2
We analyze circular velocity profiles of seven ultradiffuse galaxies (UDGs) that are isolated and gas-rich. Assuming that the dark matter halos of these UDGs have a Navarro-Frenk-W…
New evidence for halo gas accretion onto disk galaxies
Filippo Fraternali
Studies of the halo gas in the Milky Way and in nearby spiral galaxies show the presence of gas complexes that cannot be reconciled with an internal (galactic fountain) origin and…
Fast rotations in galaxies at cosmic noon indicate central concentration of stars, dark matter or massive black holes
Fernanda Roman-Oliveira, Francesca Rizzo, Filippo Fraternali
The rotation curves of regularly rotating disc galaxies are a unique probe of the gravitational potential and dark matter distribution. Until recently, matter decomposition of rota…
Angular momentum, accretion and radial flows in chemodynamical models of spiral galaxies
Gabriele Pezzulli, Filippo Fraternali
Gas accretion and radial flows are key ingredients of the chemical evolution of spiral galaxies. They are also tightly linked to each other (accretion drives radial flows, due to a…
Modelling the HI halo of the Milky Way
Antonino Marasco, Filippo Fraternali
Aims: we studied the global distribution and kinematics of the extra-planar neutral gas in the Milky Way. Methods: we built 3D models for a series of Galactic HI layers, projected…
High velocity HI in NGC 6946 and extra-planar gas in NGC 253
Rense Boomsma, Tom Oosterloo, Filippo Fraternali +2
Multi-wavelength observations of nearby spiral galaxies have shown that neutral and ionized gas are present up to a few kpc from the disk and that star formation and supernovae pro…
The Galactic fountain as an origin for the Smith Cloud
Antonino Marasco, Filippo Fraternali
The recent discovery of an enriched metallicity for the Smith high-velocity HI cloud (SC) lends support to a Galactic origin for this system. We use a dynamical model of the galact…
Structure and dynamics of giant low surface brightness galaxies
Federico Lelli, Filippo Fraternali, Renzo Sancisi
Giant low surface brightness (GLSB) galaxies are commonly thought to be massive, dark matter dominated systems. However, this conclusion is based on highly uncertain rotation curve…
No need for dark matter: resolved kinematics of the ultra-diffuse galaxy AGC 114905
Pavel E. Mancera Piña, Filippo Fraternali, Tom Oosterloo +3
We present new HI interferometric observations of the gas-rich ultra-diffuse galaxy AGC 114905, which previous work, based on low-resolution data, identified as an outlier of the b…
Dynamical modelling and origin of gas turbulence in z 4.5 galaxies
Fernanda Roman-Oliveira, Francesca Rizzo, Filippo Fraternali
In recent years, a growing number of regularly rotating galaxy discs have been found at z 4. Such systems provide us with the unique opportunity to study the properties of d…
JWST MIRI and NIRCam observations of NGC 891 and its circumgalactic medium
Jérémy Chastenet, Ilse De Looze, Monica Relaño +37
We present new JWST observations of the nearby, prototypical edge-on, spiral galaxy NGC 891. The northern half of the disk was observed with NIRCam in its F150W and F277W filters.…
Gaseous Haloes: Linking Galaxies to the IGM
Filippo Fraternali, James Binney, Tom Oosterloo +1
In recent years evidence has accumulated that nearby spiral galaxies are surrounded by massive haloes of neutral and ionised gas. These gaseous haloes rotate more slowly than the d…
The impact of the halo spin-concentration relation on disc scaling laws
Lorenzo Posti, Benoit Famaey, Gabriele Pezzulli +3
Galaxy scaling laws, such as the Tully-Fisher, mass-size and Fall relations, can provide extremely useful clues on our understanding of galaxy formation in a cosmological context.…
The vertical structure and kinematics of HI in spiral galaxies
Renzo Sancisi, Filippo Fraternali, Tom Oosterloo +1
We discuss the distribution and kinematics of neutral hydrogen in the halos of spiral galaxies. We focus in particular on new results obtained for the nearby Sc galaxy NGC 2403 whi…
X-Ray Detection of the Galaxy's Missing Baryons in the Circum-Galactic Medium of L Galaxies
Fabrizio Nicastro, Yair Krongold, Taotao Fang +10
The amount of baryons hosted in the disks of galaxies is lower than expected based on the mass of their dark-matter halos and the fraction of baryon-to-total matter in the universe…
S0 galaxies are faded spirals: clues from their angular momentum content
Francesca Rizzo, Filippo Fraternali, Giuliano Iorio
The distribution of galaxies in the stellar specific angular momentum versus stellar mass plane (-) provides key insights into their formation mechanisms. In…