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Information Page of SAS Organisation


Astronomical Institute

National Projects

Dynamical versus generic relationship in the groups of small bodies in the Solar System

Dynamická verzus generická príbuznosť v skupinách malých telies v Slnečnej sústave

Duration: 1. 1. 2022 - 31. 12. 2025
Evidence number:VEGA 2/0009/22
Program: VEGA
Project leader: RNDr. Neslušan Luboš CSc.
Annotation:In the studies of the parent bodies of meteor showers, it was revealed that two parent bodies, comet 96P and asteroid 196256, move in the orbits, which librate in almost identical phase space. Their current orbits are different. However, they periodically become almost identical and also the objects closely approach each other. Since the objects are different from the physical point of view, a reason for the similarity is unknown. A similar problem appears, however, also in the families of asteroids consisting sometimes of the members of different taxonomy class. In the project, we focuss our attention mainly to the problem whether the above-mentioned similarity can also occur, with a relatively high probability, as a consequence of the dynamical evolution of objects. Moreover, we will study further aspects of the dynamical evolution of small bodies in the Solar System.

Extrasolar planets: an extrem case of interacting binary stars

Extrasolárne planéty: extrémny prípad interagujúcich dvojhviezd

Duration: 1. 1. 2022 - 31. 12. 2025
Evidence number:VEGA 2/0031/22
Program: VEGA
Project leader: RNDr. Budaj Ján CSc.
Annotation: Interacting binary (IB) stars consist of two stars, often with vastly different masses, radii, and/or temperatures. They interact via gravity and irradiation. Planet-stars systems are subject to the same kind of interaction and could be considered an extreme case of IB stars. Improving our own tools developed originally for IB stars we will study mutual interaction of stars and exoplanets. Aim of a project is to model exoplanet transits including the gravity darkening of a rotating star to determine an inclination between the rotational and orbital axes; analyse properties of a few dust emitting exoasteroids orbiting stars like white dwarf WD1145; analyse and compare behaviour of the circumstellar and circumplanetary material in exoplanets and IB. For this purpose, we will use data from KEPLER, TESS, CHEOPS satellites, and our own spectroscopic and photometric observations. This project is also connected to the international projects: DWARF and DAAD project RGB->EHB.

Physical and dynamical properties of Solar system small bodies as indicators of their origin and evolution

Fyzikálne a dynamické vlastnosti malých telies v Slnečnej sústave ako indikátory ich pôvodu a evolúcie

Duration: 1. 1. 2022 - 31. 12. 2025
Evidence number:VEGA 2/0059/22
Program: VEGA
Project leader: Mgr. Husárik Marek PhD.
Annotation:The project is dedicated to the study of physical properties of small Solar System bodies – relicts in which the matter of the primordial nebula is embedded. The study is focused on the search for correlations of their orbital characteristics and identification of properties associated with different regions of their origin and evolution. The study of comets and asteroids is important also because of their potential encounter with the Earth. To address this goal, it is necessary to: make comprehensive photometric, polarimetric, and spectroscopic observations of different dynamical groups; investigate dynamical relationships between different populations by modeling their orbital evolution; study the evolution and activity mechanisms over a wide spatial and temporal range; develop new and refine existing theoret. models to explain physical processes in comets, asteroids, and the meteoroid impacts into the Earth's atmosphere. Contribution by planned observations into international campaigns for space missions is possible.

Multifrequency research of accreting white dwarfs in cataclysmic variables

Multifrekvenčný výskum akreujúcich bielych trpaslíkov v kataklizmatických premenných hviezdach

Duration: 1. 1. 2021 - 31. 12. 2024
Evidence number:VEGA 2/0030/21
Program: VEGA
Project leader: RNDr. Skopal Augustín DrSc.
Annotation:Accretion process in astrophysical systems represents the pivotal process in evolution of stellar systems and galaxies in our Universe. It substantially contributes to the total production of the light mainly in binary systems containing a compact star with a strong gravitational field. In the case when the compact star is the so-called white dwarf (WD) gaining material from its donor companion, we talk about cataclysmic variables (CVs). Accretion process onto the WD leads to sudden brightenings (outbursts) on the irregular timescales, followed by a return to quiescence. According to the binary type and the mass transfer rate we observe classical nova outbursts, dwarf nova outbursts and the Z And-type outbursts. The pivotal goal of this project is the research of outbursts in Cvs. We achieve particular aims using the method of multifrequency modelling of the spectral energy distribution during outbursts and by modelling accurate multi-colour photometry and spectroscopic measurements of investigated objects.

In2Ex - From Interacting Binaries to Exoplanets

Od interagujúcich hviezd k exoplanétam

Duration: 1. 7. 2021 - 30. 6. 2025
Evidence number:APVV-20-0148
Program: APVV
Project leader: RNDr. Pribulla Theodor CSc.
Annotation:Stars and stellar systems are the main field of research at our institute for more than half of a century. The aim of this project is to shift our focus towards the exoplanets. In fact, stars and exoplanets have a lot in common. They are often studied by similar methods of photometry and spectroscopy. Transit light curves are true analogues of eclipses in binaries and radial-velocity curves differ only in the amplitudes. Over the years we have developed the infrastructure and tools to study and model eclipsing binary stars. We aim to build upon these stepping stones and apply them to extrasolar planets. This transition will take years and during this period we will study interacting binaries and exoplanets simultaneously. We will attempt to advance the state-of-the art at several fronts including the search for disintegrating exoplanets and exoasteroids with dusty effluents, exoplanets around rapid rotators as well as cataclysmic variables at critical stages of their evolution. The goals of this project will be achieved by modelling observations of the investigated objects including multi-colour CCD photometry and échelle spectroscopy using advanced tools for their analysis. In addition to new observations obtained wit h the local facilities, the high-precision data from dedicated satellites (e.g., TESS, CHEOPS or Gaia) and large ground-based telescopes will be used.


Štipendiá pre excelentných výskumníkov ohrozených vojnovým konfliktom na Ukrajine - O. Shubina

Duration: 1. 7. 2022 - 30. 6. 2025
Evidence number:09I03-03-V01-00001
Program: Štrukturálne fondy EÚ Výskum a vývoj
Project leader: Mgr. Gömöry Peter PhD.


Štipendiá pre excelentných výskumníkov ohrozených vojnovým konfliktom na Ukrajine - V. Krushevska

Duration: 1. 8. 2022 - 31. 7. 2025
Evidence number:09I03-03-V01-00002
Program: Štrukturálne fondy EÚ Výskum a vývoj
Project leader: Mgr. Gömöry Peter PhD.

Investigation of the dynamic and magnetic properties of the structures in the solar atmosphere based on spectroscopic and spectro-polarimetric methods

Štúdium dynamiky a magnetických vlastností štruktúr v slnečnej atmosfére spektroskopickými a spektro-polarimetrickými metódami

Duration: 1. 1. 2020 - 31. 12. 2023
Evidence number:VEGA 2/0048/20
Program: VEGA
Project leader: Mgr. Gömöry Peter PhD.
Annotation:The solar atmosphere is a dynamic object consisting of many interacting structures which are highly variable in time and dominantly controlled by the magnetic field. The magnetic field drives not only the mentioned events but it also affects physical conditions in the heliosphere, controls space weather, and thus directly affects the Earth's biosphere. Therefore, the main goal of this project is to study physical properties of the solar magnetic phenomena. For this purpose, the data acquired by large ground-based telescopes (e.g., GREGOR, SST, GST, DKIST) and by space-born instruments (e.g., IRIS, SDO, PSP) will be used. In addition, data acquisition performed using unique infrastructure at Lomnicky Peak Observatory (CoMP-S, SCD) is planned. Principally new findings will be acquired by analysing the highest quality experimental data, using specialized routines for numerical modelling and inversion codes developed to determine the components of magnetic vector fields related to the phenomena under study.

The relationship between color and polarization in comets: clues to understanding microphysical properties of cometary dust and mechanisms of its ejection

Vzťah medzi farbou a polarizáciou v kométach: kľúče k pochopeniu mikrofyzikálnych vlastností kometárneho prachu a mechanizmov jeho úniku

Duration: 1. 7. 2020 - 30. 6. 2024
Evidence number:APVV-19-0072
Program: APVV
Project leader: Mgr. Ivanova Oleksandra PhD.
Annotation:The aim of the project focuses on the research of physical properties of dust particles in cometary atmospheres. For the first time, the systematic study of rapid changes in a color index and a degree of linear polarization of 10 comets (in minimum) will be performed, and this allow us to estimate the frequency of such phenomena in comets. The vast majority of comets were observed in a limited number of periods and/or with a long time intervals among them. However, taking into account the recent finding of rapid variations in cometary dust properties from the scattering of sunlight, it is a lack of agreement with observational results. Our research carried out within this project should help to resolve this very important issue. Characteristics of comets obtained from our observations, as well as already archived data, will be analyzed for the rate of change in a color index and/or in a degree of linear polarization in comet's coma and tail. This should allow us to find a correlation among observed color changes and polarization and the microphysical characteristics of cometary dust. In addition, a possible correlation of rapid color variations and polarization with other cometary characteristics such as their orbital motion, chemical composition of ice, thermal emissions, etc. will be examined. This analysis will improve our understanding of mechanisms that causes a rapid changes in comets and thus qualitatively improve our knowledge of short-term processes in cometary evolution.

Generalized Incidence Geometries in Quantum Information and Astrophysics

Zovšeobecnené incidenčné geometrie v kvantovej informácii a astrofyzike

Duration: 1. 1. 2020 - 31. 12. 2023
Evidence number:VEGA 2/0004/20
Program: VEGA
Project leader: RNDr. Saniga Metod DrSc.
Annotation:The project is aimed at getting further substantial insights into the role of (mostly finite) incidence geometries in the field of quantum information and astrophysics. We shall deal, consecutively, with: projective ring lines endowed with non-unimodular parts and quantum entanglement/non-locality; parapolar spaces of symplectic rank at least three and associated observable-based proofs of quantum contextuality; exceptional Moufang polygons and metasymplectic spaces of type F_4 to shed further light on the peculiar role of the smallest Galois field in quantum information; Veldkamp spaces exhibiting both not-connected complements of certain geometric hyperplanes and at least two distinct types of ovoids, which will be relevant for the black-hole/qubit correspondence and quantum coding; and, finally, with incidence geometries endowed with repeated lines, to account for finer traits of geometrical distinction between negative and positive quantum contexts.

Projects total: 10