A5059490173- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Astrophysics and Star Formation Studies
- Isotope Analysis in Ecology
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Nuclear Physics and Applications
- Spacecraft and Cryogenic Technologies
- Space Exploration and Technology
- Molecular Spectroscopy and Structure
- Astronomical and nuclear sciences
- Radioactive element chemistry and processing
- Atomic and Molecular Physics
- Particle Accelerators and Free-Electron Lasers
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Chemical Thermodynamics and Molecular Structure
- International Science and Diplomacy
- Spectroscopy and Chemometric Analyses
- Surface Roughness and Optical Measurements
- Radioactive Decay and Measurement Techniques
- SAS software applications and methods
Slovak Academy of Sciences
2023
Astronomical Institute of the Slovak Academy of Sciences
2023
Taras Shevchenko National University of Kyiv
2023
Main Astronomical Observatory
2012-2022
National Academy of Sciences of Ukraine
2001-2021
National Academy of Sciences
2012
Isaac Newton Institute
2002-2003
Aims. The aim of our work is to analyze the light curves $\beta$ Pic recently observed by TESS in sectors 32, 33, and 34, searching for signatures exocomet transits. Methods. We process from MAST database, applying frequency analysis remove harmonic signals due star's pulsations use a simple 1-D model fit profiles found events. Results. recover events previously other authors 5 6 find five new distinct aperiodic dipping with asymmetric shapes resembling expected passage comet-like body...
Context. The study of small bodies that have a cometary activity at large heliocentric distance (larger than 5 au) is important for better understanding the physical properties comets and their origin. Such studies require long-term monitoring significant observational effort.
Centaur 174P/Echeclus, initially designated as (60558) 2000 EC98, presented three outbursts. A first and main one detected in 2005 December, another smaller 2011 May a last at the end of 2016 August. The outburst was largest ever for Centaur, order 30 times that seen other similar bodies. Because special interest this target, its brightness, we now have large set observational data were obtained before, during after two We present here new or coming from archives an analysis them. results...
Aims.We have started a program of spectroscopic and photometric investigations distant active comets in the optical domain. The with significant level activity–in particular, extended tails–are objects our observations.
Context. The systematic investigation of comets in a wide range heliocentric distances can contribute to better understanding the physical mechanisms that trigger activity at large from Sun and reveals possible differences composition outer solar system bodies belonging various dynamical groups. Aims. We seek analyze dust environment selected nearly isotropic with perihelion distance between 4.5 9.1 au, where sublimation water ice is considered be negligible. Methods. present results...
In the framework of worldwide ground-based campaign, long-slit spectroscopy comet 67P/Churyumov–Gerasimenko was performed at 6 m BTA telescope Special Astrophysical Observatory RAS in post-perihelion period from 2015 November to 2016 April a heliocentric distance 1.61 2.72 au. Strong CN and relatively weak C2, C3, CO+ emissions were identified spectra on 8 December 9, while NH2 only observed 8. spectrum derived 3, emission found. The production rates CN, C2 are good agreement with data...
CCD observations of comet C/1999 J2 (Skiff) were made at the Pik Terskol Observatory on September 15, 1999. The 2-m telescope equipped with two-channel focal reducer Max-Plank-Institute for Aeronomy was used to study cometary environment. In spite large heliocentric distance, 7.24 AU, a straight dust tail fairly well defined boundaries recorded. These data provide an opportunity peculiarity dust, that is not driven by water vapor. To fit tail, Monte Carlo model developed. We trace...
Context. High-resolution spectra of comets permit deriving the physical properties coma. In optical range, relative production rates can be computed, and information about isotopic ratios origin oxygen atoms obtained.
Context. Long period distant comet C/2006 W3 (Christensen) was discovered in 2006 and passed perihelion at 3.13 au July 2009. It a target for the Herschel Space Observatory, Spitzer Telescope, ground-based radio telescopes. We enlarge observational database with optical spectrophotometric ground base data.
Comet C/1999 J3 (LINEAR) was observed with 2 m telescope of the Pik Terskol Observatory on September 19, 1999. Narrow-band CCD images CN, NH2, and dust atmospheres were recorded Two-Channel focal reducer Max-Plank-Institute for Aeronomy. The distributions CN NH2 molecules in comet atmosphere fitted a Monte Carlo model. For best agreement between calculated surface profiles reached photodissociation lifetime s parent s. This result indicates that HCN is main source radicals (LINEAR)....