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11 papers · 2 filters
Tidal disruption events can power the observed AGN in dwarf galaxies
Kastytis Zubovas
In recent years, numerous active galactic nuclei have been discovered in ever smaller galaxies, questioning the paradigm that dwarf galaxies do not harbour central massive black ho…
A new method to derive star formation histories in dwarf galaxies
Marius Čeponis, Rima Stonkutė, Vladas Vansevičius
We present a new method to derive 2D star formation histories in dwarf irregular galaxies. Based on multicolor stellar photometry data we have found that in the Leo A galaxy during…
Star clusters and young populations in the dwarf irregular galaxy Leo A
R. Stonkutė, M. Čeponis, A. Leščinskaitė +1
We have studied young stellar populations and star clusters in the dwarf irregular galaxy Leo A using multicolor (, , , , ) photometry data obtained with the Subaru…
Bright-red stars in the dwarf irregular galaxy Leo A
Alina Leščinskaitė, Rima Stonkutė, Vladas Vansevičius
We analysed a population of bright-red (BR) stars in the dwarf irregular galaxy Leo A by using multicolour photometry data obtained with the Subaru/Suprime-Cam (, , , ,…
The Gaia-ESO Survey: the N/O abundance ratio in the Milky Way
L. Magrini, F. Vincenzo, S. Randich +31
The abundance ratio N/O is a useful tool to study the interplay of galactic processes, e.g. star formation efficiency, time-scale of infall and outflow loading factor We aim to tra…
Deriving star cluster parameters with convolutional neural networks. I. Age, mass, and size
J. Bialopetravičius, D. Narbutis, V. Vansevičius
Context. Convolutional neural networks (CNNs) have been proven to perform fast classification and detection on natural images and have potential to infer astrophysical parameters o…
AGN must be very efficient at powering outflows
Kastytis Zubovas
Galaxy evolution is affected by competing feedback processes. Stellar feedback dominates in low-mass galaxies, while AGN feedback predominantly affects massive ones. Recent observa…
The Gaia-ESO Survey: the origin and evolution of s-process elements
L. Magrini, L. Spina, S. Randich +45
Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations, giving important constraints to stell…
Multi-phase outflows as probes of AGN accretion history
Emanuele Nardini, Kastytis Zubovas
Powerful outflows with a broad range of properties (such as velocity, ionization, radial scale and mass loss rate) represent a key feature of active galactic nuclei (AGN), even mor…
Sgr A envelope explosion and the young stars in the centre of the Milky Way
Sergei Nayakshin, Kastytis Zubovas
Sgr A is the super massive black hole residing in the centre of the Milky Way. There is plenty of observational evidence that a massive gas cloud fell into the central parsec o…
Reignited star formation in dwarf galaxies quenched during reionization
Eimantas Ledinauskas, Kastytis Zubovas
Irregular dwarf galaxies of the Local Group have very varied properties and star formation histories. Some of them formed the majority of their stars very late compared to the othe…