The period luminosity relation of Cepheids in the light of Gaia
Anetjärvi, Markus (2020-08-24)
Anetjärvi, Markus
M. Anetjärvi
24.08.2020
© 2020 Markus Anetjärvi. Tämä Kohde on tekijänoikeuden ja/tai lähioikeuksien suojaama. Voit käyttää Kohdetta käyttöösi sovellettavan tekijänoikeutta ja lähioikeuksia koskevan lainsäädännön sallimilla tavoilla. Muunlaista käyttöä varten tarvitset oikeudenhaltijoiden luvan.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202008272891
https://urn.fi/URN:NBN:fi:oulu-202008272891
Tiivistelmä
Cepheids are bright variable stars that pulsate radially and have a strong relation between the luminosity and the period of the pulsation. The relation is known as the Period-Luminosity (PL) relation making them useful for extragalactic distance estimations.
The goal of this Thesis is to determine the PL/PW relations of Cepheids using the Gaia data, that contains observations of 9575 individual Cepheids. The PL/PW relations are calibrated using the Magellanic Clouds, and the results are consistent with the literature values. The calibrated relations are then used to the Milky Way Cepheids, and distances obtained by the relations are well consistent with the Gaia parallax distances, up to 3000 parsecs.
The goal of this Thesis is to determine the PL/PW relations of Cepheids using the Gaia data, that contains observations of 9575 individual Cepheids. The PL/PW relations are calibrated using the Magellanic Clouds, and the results are consistent with the literature values. The calibrated relations are then used to the Milky Way Cepheids, and distances obtained by the relations are well consistent with the Gaia parallax distances, up to 3000 parsecs.
Kokoelmat
- Avoin saatavuus [31657]