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Transneptunian objects
Blomann, Antonín ; Wolf, Marek (advisor) ; Ďurech, Josef (referee)
Transneptunian objects are a group of bodies outside of the Solar System. The number of these observed bodies is growing. Dynamical structures and physical characteristics provide an evidence for processing the Solar System in the earlier days. Studying and understanding orbits and their origin in Kuiper Belt can help to explain the progress of other objects in Solar System especially Jovian planets. A phase called migration of Jovian planets was a key process for forming structures and orbits. The theoretical part is in the first three chapters. The second part is focused on the description of the observational equipment technique and the observation itself. The CCD chips and computers play an important role in astrometry. The observation and astrometry proceeded on the observatory Ondřejov on 0.65 m telescope with the CCD chip KAF 3200ME in camera G2 3200 made by company Moravské přístroje. The pictures with exposition 120 sec were taken by the camera and after modified, put together and used for the astronometrical mensuration. The dates were sent to the MPC database.
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The light curves of eclipsing binaries
Korda, David ; Zasche, Petr (advisor) ; Wolf, Marek (referee)
New CCD photometric observations of ten short-period LMB (Low Mass Binaries) were carried out. Data were obtained using 65 cm telescope in Ondřejov in the filters I, R and V from 2014 to 2016. Light curves were analysed using the program PHOEBE. The obtained masses and radii of the stars were compared with the theoretical mass-radii relation. There arises that the short-period binaries have the radii of about 4 % larger than the theoretical prediction from the stellar evolution models. Powered by TCPDF (www.tcpdf.org)
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A new study of the long-term and orbital variations of the Be star V923 Aql
Steiner, Michal ; Harmanec, Petr (advisor) ; Wolf, Marek (referee)
The first part of this thesis deal with the topic of Be stars, their variability on different time scales and some of the models explaining formation of the envelope. Next part deals with software, which is used for measurement. After introduction to these programs the data analysis follows. Overall, 46 spectra from Ondřejov Observatory and Hvar photometric observations that covered time RJD=52000- 58500 has been used. Each finding were compared with already known properties of V923Aql. Most behavior patterns that were seen in the past has been seen even in the available data, but a difference between RVHα and RVM measured on metallic lines were found. Also, the length of long-term cycle seems to differ from that in the past cycles. 1
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