|
|
The light-curve solution of an eclipsing binary
Procházka, Ondřej ; Zasche, Petr (advisor) ; Wolf, Marek (referee)
The main aim of this work was the first detailed analysis of an eclipsing binary system V641 Aur. The complete light curve of this binary was obtained in three photometric filters, which were analyzed with the program PHOEBE. It is a double star with the orbital period of about 0.50487 day, whose both components are rather similar. Their individual spectral types are probably F6 and F8 (according to the temperatures), or F6 and F6 (as derived from masses). Both are orbiting on a circular orbit and despite their short period the system is a detached one and both components are still located on the main sequence. Moreover, thanks to the asymmetry of the light curve there was discovered a spot on the surface of the primary component, and the third light was not detected. For more detailed analysis higher accuracy of photometry and spectroscopy data are required.
|
|
|
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.
|
|
| |
|
| |
|
| |
|
|
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)
|
|
| |
|
| |
|
| |
|
| |
guest ::
RSS feed.