36 citations · 269 across the 17 of their papers we have counts for
18 papers · 1 filter
The Milky Way satellite galaxy Leo T: A perturbed cored dwarf
Matias Blaña, Andreas Burkert, Michael Fellhauer +3
The impact of the dynamical state of gas-rich satellite galaxies at the early moments of their infall into their host systems and the relation to their quenching process are not co…
Bar-driven Gas Dynamics of M31
Zi-Xuan Feng, Zhi Li, Juntai Shen +5
The large-scale gaseous shocks in the bulge of M31 can be naturally explained by a rotating stellar bar. We use gas dynamical models to provide an independent measurement of the ba…
The Accretion Mode in Sub-Eddington Supermassive Black Holes: Getting into the Central Parsecs of Andromeda
C. Alig, A. Prieto, M. Blaña +5
The inner kiloparsec regions surrounding sub-Eddington (luminosity less than 10 in Eddington units, L) supermassive black holes (BHs) often show a characteristic net…
The giant low surface brightness galaxy Malin 1: new constraints for its molecular gas mass from GBT/ARGUS observations
Gaspar Galaz, David T. Frayer, Matias Blaña +8
We report on results from GBT/ARGUS CO(1-0) observations for the giant low surface brightness galaxy Malin 1, which allow us to determine an upper limit for its CO mass, and…
Large-scale Hydrodynamical Shocks as the Smoking Gun Evidence for a Bar in M31
Zi-Xuan Feng, Zhi Li, Juntai Shen +3
The formation and evolutionary history of M31 are closely related to its dynamical structures, which remain unclear due to its high inclination. Gas kinematics could provide crucia…
Dwarfs in the Milky Way halo outer rim: first in-fall or backsplash satellites?
Matias Blaña, Andreas Burkert, Michael Fellhauer +2
Leo T is a gas-rich dwarf located at 414kpc distance from the Milky Way (MW) and it is currently assumed to be on its first approach. Here, we present an analysi…
Unravelling stellar populations in the Andromeda Galaxy
Grzegorz Gajda, Ortwin Gerhard, Matías Blaña +4
To understand the history and formation mechanisms of galaxies it is crucial to determine their current multidimensional structure. Here we focus on stellar population properties,…
The survey of Planetary Nebulae in Andromeda (M31) II. Age-velocity dispersion relation in the disc from Planetary Nebulae
Souradeep Bhattacharya, Magda Arnaboldi, Nelson Caldwell +7
The age-velocity dispersion relation is an important tool to understand the evolution of the disc of the Andromeda galaxy (M31) in comparison with the Milky Way. We use Planetary N…
The stellar populations of the central region of M31
R. P. Saglia, M. Opitsch, M. H. Fabricius +3
We continue the analysis of the dataset of our spectroscopic observation campaign of M31, by deriving simple stellar population properties (age metallicity and alpha-elements overa…
How fast is mass-segregation happening in hierarchical formed embedded star clusters?
R. Dominguez, M. Fellhauer, M. Blana +2
We investigate the evolution of mass segregation in initially sub-structured young embedded star clusters with two different background potentials mimicking the gas. Our clusters a…
Evidence for non-axisymmetry in M31 from wide-field kinematics of stars and gas
Michael Opitsch, Maximilian H. Fabricius, Roberto P. Saglia +3
As the nearest large spiral galaxy, M31 provides a unique opportunity to learn about the structure and evolutionary history of this galaxy type in great detail. Among the many obse…
Andromeda chained to the Box -- Dynamical Models for M31: Bulge & Bar
Matias Blana, Christopher Wegg, Ortwin Gerhard +5
Andromeda is our nearest neighbouring disk galaxy and a prime target for detailed modelling of the evolutionary processes that shape galaxies. We analyse the nature of M31's triaxi…
Could Segue 1 be a destroyed star cluster? - a dynamical perspective
Raul Dominguez, Michael Fellhauer, Matias Blaña +5
We attempt to find a progenitor for the ultra-faint object Segue 1 under the assumption that it formed as a dark matter free star cluster in the past. We look for orbits, using the…
The difficult early stages of embedded star clusters and the importance of the pre-gas expulsion virial ratio
J. P. Farias, R. Smith, M. Fellhauer +4
We examine the effects of gas-expulsion on initially substructured distributions of stars. We perform N-body simulations of the evolution of these distributions in a static backgro…
Life and death of a hero - Lessons learned from modeling the dwarf spheroidal Hercules: an incorrect orbit?
M. Blana, M. Fellhauer, R. Smith +3
Hercules is a dwarf spheroidal satellite of the Milky Way, found at a distance of about 138 kpc, and showing evidence of tidal disruption. It is very elongated and exhibits a veloc…
A Possible Formation Scenario for Dwarf Spheroidal Galaxies - II: A Parameter Study
P. Assmann, M. Fellhauer, M. I. Wilkinson +2
Dwarf spheroidal (dSph) galaxies are considered the basic building blocks of the galaxy formation process in the LCDM (Lambda Cold Dark Matter) hierarchical cosmological model. The…
Ursa Major II - Reproducing the observed properties through tidal disruption
R. Smith, M. Fellhauer, G. N. Candlish +3
Recent deep photometry of the dwarf spheroidal Ursa Major II's morphology, and spectroscopy of individual stars, have provided a number of new constraints on its properties. With a…
Leo IV & V - A possible dwarf galaxy pair ?
Matias Blaña, Michael Fellhauer, Rory Smith
The last few years have seen the discovery of many faint and ultra-faint dwarf spheroidal galaxies around the Milky Way. Among these is a pair of satellites called Leo IV and Leo V…