Invited Talk - Splinter JungeAG
Tuesday, 12 September 2023, 14:30 (H 3007)
Youth's research talk: Determination of the Hubble Constant by 1a supernovae
The expansion of the universe can be quantified by the Hubble Constant. This constant can be determined through different methods, such as by the cosmic microwave background, the Tully-Fisher relation, or type 1a supernovae. Each method gives different values of the Hubble Constant, which results in a discussion about the value and whether it is a constant at all. That is why I wanted to measure the Hubble Constant through type 1a supernovae on my own. For this purpose, I took pictures and spectra of 1a supernovae at two different observatories in the Eifel Region and used the data of a worldwide telescope network (Las Cumbres Observatory), where I was also able to create observing assignments myself. At first, I used these spectra to evaluate the type of each supernova and then to determine the value of the cosmological redshift of the supernova. After that, I used pictures of the supernovae, which were made with a blue filter to receive the distance of each supernova. Then I plotted the velocity of the supernova which results from the cosmological redshift against the distance of the respective supernova to obtain the Hubble Constant as 69,80 (km/s)/Mpc ± 5,89(km/s)/Mpc.