Information Page of SAS Organisation

Astronomical Institute

International projects

Diagnostics of solar coronal structures with impulsively generated magnetoacoustic wave trains (observations and numerical simulations)
Diagnostika slnečných koronálnych štruktúr pomocou impulzívne generovaných magnetoakustických vĺn (pozorovania a numerické simulácie)
Program: Medziakademická dohoda (MAD)
Project leader: RNDr. Rybák Ján CSc.
Annotation:We develop our new concept of diagnostics of individual solar coronal structures (e.g. flare loops, flare current sheets) with impulsively generated magnetoacoustic wave trains. We plan to further study our present magnetohydrodynamic (MHD) numerical simulations of these waves for different coronal structures. Using our new methods of wavelet analysis, we plan to analyze the observations (also with a spatial resolution) of solar flares (e.g. complex observational event of unique solar flares) in a whole range of the electromagnetic spectrum. The main expected result is more realistic numerical MHD model of these magnetoacoustic waves, which allows us to determine the characteristic plasma parameters of the coronal structures as well as the relationship between individual coronal structures and impulsively generated magnetoacoustic waves propagating in these structures. The project results will be published in international refereed journals and presented at international conferences.
Duration: 1.1.2016 - 31.12.2017

Two suns in the sky: search for circumbinary planets with the TEST telescope
Dve slnká na oblohe: hľadanie exoplanét okolo dvojhviezd s ďalekohľadom TEST
Program: Bilaterálne - iné
Project leader: RNDr. Pribulla Theodor CSc.
Annotation:The project is aimed at search for planets orbiting eclipsing binaries based on the orbital-period changes. Revolution of a planet or a brown dwarf causes cyclic changes of the orbital period due to the finite speed of light. The changes can be detected from precise timing of the minimum light. The project includes modernisation and robotisation of telescope TEST at the TLS. Period analysis of eclipsing binaries observed with CoRoT is also one of the goals.
Duration: 1.1.2015 - 31.12.2017

ORIGINS - Origins and evolution of life on Earth and in the Universe
Pôvod a evolúcia života na Zemi a vo vesmíre
Program: COST
Project leader: Mgr. Kaňuchová Zuzana PhD.
Annotation:The Action addresses three basic questions that fascinate and intrigue scientists, and the general public alike, questions that are pivotal to our understanding and appreciation of our place in the universe. Where, when and how did life emerge and evolve on Earth? What are the conditions under which life can exist? Does life exist elsewhere in the Universe and, if it does, how can it be detected and identified? The Action has specifically excluded the search for intelligent extraterrestrial life in its portfolio. Creationist theorems are also outside the Action’s remit.
Project web page:http://life-origins.com/
Duration: 15.5.2014 - 14.5.2018

PRE-EST - Preparatory Phase for the European Solar Telescope.
Prípravná fáza pre Európsky slnečný ďalekohľad.
Program: Horizont 2020
Project leader: Mgr. Gömöry Peter PhD.
Annotation:The European Solar Telescope (EST) will be a revolutionary Research Infrastructure that will play a major role in answering key questions in modern Solar Physics. This 4-meter class solar telescope, to be located in the Canary Islands, will provide solar physicists with the most advanced state-of-the-art observing tools to transform our understanding of the complex phenomena that drive the solar magnetic activity. The principal objective of the present Preparatory Phase is to provide both the EST international consortium and the funding agencies with a detailed plan regarding the implementation of EST. The specific objectives of the proposed preparatory phase are: 1) to explore possible legal frameworks and related governance schemes that can be used by agencies to jointly establish, construct and operate EST as a new research infrastructure, with the implementation of an intermediate temporary organisational structure, as a previous step for future phases of the project; 2) to explore funding schemes and funding sources for EST, including a proposal of financial models to make possible the combination of direct financial and in-kind contributions towards the construction and operation of EST; 3) to compare the two possible sites for EST in the Canary Islands Astronomical Observatories and prepare final site agreements; 4) to engage funding agencies and policy makers for a long-term commitment which guarantees the construction and operation phases of the Telescope; 5) to involve industry in the design of EST key elements to the required level of definition and validation for their final production; 6) to enhance and intensify outreach activities and strategic links with national agencies and the user communities of EST.
Project web page:http://www.est-east.eu/est/index.php/pre-phase
Duration: 1.4.2017 - 31.3.2021

The study of interplanetary matter in the Earth’s vicinity
Štúdium medziplanetárnej hmoty v blízkosti Zeme
Program: Medziakademická dohoda (MAD)
Project leader: Mgr. Husárik Marek PhD.
Annotation:The Earth is constantly bombarded by interplanetary matter objects. The main goal is the study of the solid part of the interplanetary matter with Earth's atmosphere interaction, primarily meteors, and also photometric study of the asteroids. The meteors can provide us much refined and brand new knowledge of the parent bodies – comets and asteroids. The project is focused to the faint meteors observations in the Earth's atmosphere using double-station experiments with sensitive TV and videocameras. Bright meteors – fireballs – will be recorded by the European Fireball Network cameras installed on the each partner territory. Asteroids and comets will be observed in the Slovakia by the telescopes at Skalnate Pleso Observatory with 0.61-m Newton and with new 1.3-m Cassegrain-Nasmyth, and in the Czech Republic by the 0.65-m telescope in Ondřejov. Asteroid shape models will be computed from the photometric data. It will also be analyzed any connection of meteor streams with asteroids as potential parent bodies.
Duration: 1.1.2015 - 31.12.2017

DIMMCME - Early evolution of CMEs and associated dimming regions
Štúdium počiatočných fáz vývoja výronov koronálnej hmoty a vlastností súvisiacich oblastí koronálneho dimmingu v slnečnej atmosfére
Program: Bilaterálne - iné
Project leader: Mgr. Gömöry Peter PhD.
Annotation:In the low plasma beta corona, the restructuring of the magnetic field dictates the dynamics of a coronal mass ejection (CME), i) by setting the properties of the internal magnetic field of the CME which will generate the outward Lorentz force acting on the presumed flux rope, and ii) by altering the confining properties of the ambient coronal field. Studying CME kinematics close to the Sun thus gives unique information on the net force acting on the CME during its formation and, therefore, the magnetic energy injected in the flux rope. This early-evolution phase is also crucial for a better understanding of CME dynamics in interplanetary space. On statistical basis, the lower the CME starts in the corona the faster the maximum acceleration and speed that is reached (Bein et al., 2011, ApJ 738, article id. 191). In this respect, shock formation of fast CMEs is another key point, which is not fully understood by our current knowledge about CMEs. We will use data from a combination of instruments which are capable of observing in detail the low corona in intensity as well as magnetic and Doppler fields. These instruments will deliver ground-breaking new data in order to adequately address the early CME acceleration as well as shock formation processes and magnetic field restructuring, a key issue for a better understanding of CME dynamics in interplanetary space and forecasting of space weather.
Duration: 1.1.2016 - 31.12.2017

wafist - Waves in fine-scale structures of the solar chromosphere
Vlny v maloškálových štruktúrach chromosféry Slnka
Program: Bilaterálne - iné
Project leader: Mgr. Koza Július PhD.
Annotation:Fine-scale magnetic structures (spicules, fibrils and mottles) are small jet-like phenomena in the solar chromosphere. They may significantly contribute to the heating of the solar chromosphere/corona and may supply the corona by required mass, which is taken away by the solar wind. Therefore, to study the detailed dynamics of these structures may help us to solve the paramount problems of solar physics. Excellent spatial, temporal and spectral resolution and seeing-free vantage point of the recently launched Interface Region Imaging Spectrograph (IRIS) has already brought important breakthroughs in understanding of these jet-like phenomena. An aim of this project is to contribute to this research by observation of various modes of magnetohydrodynamic (MHD) waves propagating along chromospheric fine structures. Mode identifications and measured properties will be used in estimation of wave energy flux and magnetic field strength using chromospheric magnetoseismology. A particular attention will be paid to the accurate classification of observed MHD wave modes and their stability in flowing partially ionized plasmas. To accomplish this aim we will combine high-resolution observations obtained by the IRIS satellite with data obtained by the ground-based instruments CRISP at the Swedish 1-m Solar Telescope and GFPI at the 1.5-m GREGOR telescope (if available), and solutions of MHD equations in partially ionized plasma. All these observing and interpretation tools are on the forefront of solar physics.
Duration: 1.1.2016 - 31.12.2017

ESASOC - Evolution of Solar Activity over a Solar Cycle – from Statistics to Physics
Vývoj slnečnej aktivity počas slnečného cyklu – od štatistiky k fyzike
Program: Bilaterálne - iné
Project leader: RNDr. Rybák Ján CSc.
Annotation:We will investigate evolution of solar features over the solar cycle 24 using the high resolution SDO/HMI and SDO/AIA observations and using the spectroheliogramsgrams taken by the Geophysical and Astronomical Observatory in Coimbra (Portugal). The main aim is to get more detailed knowledge on statistical distribution of solar features on the solar disc. Using this knowledge we would like to provide a more conclusive information limiting variety of physical mechanisms proposed for the solar dynamo action. Special software tools for detection, identification and automatic tracking of various solar phenomena was already developed by the project team and it will be extended and improved in order to reach the proposed goals. Two main properties of the solar cycle activity will be in focus of the project work, namely: north-south asymetry and differential rotation fo the solar activity features including the tiny sunspots. A multidisciplinary team will work on the project: specialists in solar physics providing knowledge about solar cycles and space weather phenomena and specialists in software computing with expertise in image processing, feature detection, identification and automatic tracking.
Duration: 1.1.2016 - 31.12.2017


National projects

Analysis of dynamic and physical characteristics of interplanetary bodies in the vicinity of the Earth's path.
Analýza dynamických a fyzikálnych charakteristík medziplanetárnych telies v okolí zemskej dráhy
Program: VEGA
Project leader: doc. RNDr. Svoreň Ján DrSc.
Annotation:This project is intended to the study of small bodies in the Solar System around the Earth's path. Scientific goals change continuously from the study of structures in meteoroid streams to changes on their parent bodies. The results will be obtained by comparing observations with statistical processing and computer modeling. Asteroids and comets will be observed using the telescopes of the Skalnaté Pleso Observatory: 0,61-m Newton and new 1,3-m Cassegrain-Nasmyth, which will be the largest specialized device for observing of Near-Earth Asteroids in Europe. We will analyze meteoroids in the orbit of 1P/Halley, on a base of our statistical method of indices and dynamical modeling of particles ejecting from the cometary nucleus. We will perform long-term observations of selected comets using CCD camera in the Skalnaté Pleso Observatory to pursue a goal of the reason of sudden outbursts of comets. We will create shape models of asteroids and analyze their possibilities as as parent bodies of meteor streams.
Duration: 1.1.2014 - 31.12.2017

Physical processes in interacting binaries and extrasolar planetary systems.
Fyzikálne procesy v interagujúcich dvojhviezdach a extrasolárnych planetárnych sústavách
Program: VEGA
Project leader: RNDr. Pribulla Theodor CSc.
Annotation:This research project is aimed at the understanding of physical processes in interacting binaries and extrasolar planetary systems. The principal goals are accurate determination of the absolute parameters of binaries (masses, radii and luminosities) but also detection and study of substellar companions to single and binary stars. The project is related to two international observing campaigns: YETI and Dwarf.
Duration: 1.1.2014 - 31.12.2017

Interacting binaries – Key for the Understanding of the Universe
Interagujúce dvojhviezdy – Kľúč k porozumeniu Vesmíru
Program: APVV
Project leader: RNDr. Skopal Augustín DrSc.
Annotation:The cycle of matter from the interstellar medium into stars and then back is the basic engine that drives the evolution of matter across the age of the Universe. During evolution of stars, heavy elements enrich their interior, where extreme conditions can give rise to stellar explosions at the end of the star's evolution. Extreme explosions represent donors of particles, photons and heavy elements in the interstellar medium that is of crucial importance in understanding the circulation of matter in our Universe. More than 60% of stars is gravitationally bounded with another star, which can interact with. The pivotal aim of this project is the investigation of interacting binaries that lie at specific stages of their evolution, which allow us a better understanding of their outbursts, to determine absolute parameters of binary systems as well as to detect and determine basic properties of extrasolar planets – key ingredients for better understanding the circulation of matter in the Universe. We achieve our particular goals by the method of multifrequency modelling the energy distribution in the spectrum during outbursts, and by modelling an accurate multicolour photometric and spectroscopic measurements of the investigated objects (cataclysmic variables, W UMa and T Tauri stars, exoplanets).
Duration: 1.7.2016 - 30.6.2020

Dynamical and magnetic properties of active phenomena in the solar atmosphere – complex study.
Komplexný výskum dynamických a magnetických vlastností aktívnych javov v atmosfére Slnka.
Program: VEGA
Project leader: Mgr. Gömöry Peter PhD.
Annotation:Temporal variability and evolution of the magnetic fields significantly affects excitation, evolution and propagation of the flares and CME’s in the solar atmosphere, i.e. events which strongly influence Earth environment and technological devices. Thus, the main goal of this project is to study topology, temporal evolution and dynamical properties of the solar magnetic phenomena. New findings expected in this field will be delivered by a combination of a) the highest quality data, b) specialized routines for numerical modelling and c) inversion codes developed to determine the components of magnetic vector fields related to phenomena under study. We plan to use spectroscopic and spectro-polarimetric measurements taken by the largest ground-based telescopes (GREGOR, SST, THEMIS) and space-born instruments (IRIS, Hinode) to reach the goals of the project. Particularly important part of the data acquisition will be observations performed using unique infrastructure at Lomnický Peak Observatory (Comp-S, SCD).
Duration: 1.1.2016 - 31.12.2019

The meteoroid population, its origin, evolution and interaction with the Earth
Populácia meteoroidov, ich pôvod, vývoj a interakcia so Zemou
Program: VEGA
Project leader: RNDr. Hajduková Mária PhD.
Annotation:The project will investigate the meteoroid population in the vicinity of the Earth through systematic monitoring, using our own observational techniques; from the radio observation, through optical observations, up to investigations of their parent comets and asteroids, which provides a complex view of the broad mass interval of the investigated objects. The project‘s objectives are to determine the influx of meteoroids, to confirm the activity of meteor streams included in the working list of the IAU and eventually to discover new ones, to examine the genetic and structural relations of the meteor streams crossing the Earth’s orbit and NEOs, to analyse the dynamic evolution of their orbits, to clarify the origin of the particles, and to identify meteors caused by space debris, a hitherto neglected population. This will be followed by a modeling of a complete meteoroid particles flux into the Earth‘s atmosphere, which will reveal substantial details about the origin and structure of the whole Solar System.
Duration: 1.1.2014 - 31.12.2017

Ivanova1978 - Investigation of development of the physical activity of dynamical new comets over the wide range of heliocentric distances
Skúmanie vývoja fyzikálnej aktivity dynamickych nových komét v širokom rozsahu heliocentrických vzdialeností
Program: SASPRO
Project leader: Mgr. Ivanova Viktorovna Oleksandra PhD.
Annotation:The main goal of the presented project is the study of physical properties of the atmospheres and tails in the dynamically new comets and comparison with comets from others dynamical groups. Currently, attempts are underway to establish a taxonomy of comets on the basis of their composition and to link it to the place of their origin. A comparison of physical characteristics of short-period comets with those for long-period and new comets may elucidate which properties of comets are primordial and which are a product of subsequent evolution. The physical properties of the body mainly depend on genetic factors such as stratification of temperature with distance from the Sun, structure and density on the surfaces of bodies, the ratio of volatile and refractory materials and so on. However, the role of evolutionary processes that have determined the dynamics of small bodies, sources of internal energy, and so on, can also be significant. It is recognized that the temperature gradient in the initial dust cloud and the presence of massive proto-planets influenced the processes of accumulation, formation and evolution of small bodies in the Solar System. The result of this process are the different properties of bodies in the main asteroid belt (the difference between the properties of the main types of asteroids S, C, E, etc.), objects of the Kuiper Belt and the Oort cloud. Collisions, dynamic and evolutionary processes have generated in the Solar System objects with transient properties - meteoroid streams, objects such as Centaurs, comets with dynamic characteristics of the main asteroid belt, comets different classes as regards polarization and thermal properties and dormant cometary nuclei. Main goal of first year of work is a comprehensive study of the observed characteristics of the radiation scattered by dust particles and gas properties of comets of different dynamical groups in the Solar System. A dust and a gas are parts of atmospheres of comets, active centaurs, and also a new class of objects - comets of the main asteroid belt. Dust and gas play an important role in the process of forming different bodies and in their evolution. The main observable characteristics of scattered radiation, such as intensity, color, polarization, their spatial and spectral characteristics depend on a mechanism of the scattering of light on the dust particles and the physical properties of dust, which are size, composition, structure and form. So, a study of the properties of radiation scattered by dust particles of different objects, is the basis for the development of theoretical ideas about the interaction of radiation with matter, building physical and cosmological models of celestial bodies.
Duration: 25.2.2016 - 31.12.2018

VEGA 2/0003/16 - Veldkamp Spaces in Quantum Information and Astrophysics
Veldkampove priestory v kvantovej informácii a astrofyzike
Program: VEGA
Project leader: RNDr. Saniga Metod DrSc.
Annotation:The project will deal with the role of the concept of the Veldkamp space of a point-line incidence structure in the framework of both quantum information theory and the so-called black-hole-qubit correspondence (BHQC). Given a particular point-line incidence structure (finite geometry), the structure of its Veldkamp space will be employed as an essential and fairly efficient tool for assessing, on the one side, its possible relevance for quantum information theory and/or BHQC and, on the other side, for revealing finer traits of its physically relevant structure that would otherwise go unnoticed. A special attention will be given to Veldkamp spaces featuring a “point-within-a-point” property, as these may furnish particularly interesting representations of quantum contextuality/quantum non-locality. New (astro)physics behind possible generalizations of Veldkamp spaces will also be given a serious thought.
Duration: 1.1.2016 - 31.12.2019

Selected problems of the origin of some small-body groups in the Solar System
Vybrané problémy vzniku niektorých skupín malých telies Slnečnej sústavy
Program: VEGA
Project leader: RNDr. Neslušan Luboš CSc.
Annotation:We would like to contribute to solving of some essential problems of the Solar-System cosmogony within the our project. It is necessary to work out a well acceptable model of the growth of Uranus and Neptune from the stage of planetary embryos sup to their current masses. In relation to the model, a simulation of subsequent migration of both planets to their current orbits is desirable. Also, we would follow if the trans-Neptunian population is formed at this process and if its final structure is consistent with the current one. In extension, we will analyse the Dynamics of Centaurs aiming to find out and prove their source regions. In a shorter distance and time scales, there is an analogous problem: the formation of meteoroid streams by a release of particles from the parent bodies. Here, we would want to go on with the looking for such the parents, which have their orbit in a relatively large distance from the Earth’s orbit, but anyway the associated shower meteors are observed in Earth’s atmosphere.
Duration: 1.1.2014 - 31.12.2017

Projects total: 16