|
|||
Venue
Chonnam National University, physics department, seminar room #215 (전남대학교 자연과학대학 물리학과 215호) Date
September 02 (Fri), 2016, 14:00 ~ Speaker : Dr. Sanggyu Biern (University of Zurich) Title : Relativistic effects in cosmological observables Abstract: The ultimate goal of this seminar is to understand how the relativistic effect manifests at the cosmological observables such as the galaxy number density and the luminosity distance. This seminar is divided into two parts. Part 1. Derivation of the displacement from the observation position to the true position. In this part, by utilizing the geodesic equation, we will study how the true position of an astrophysical object is inferred from the observation position in an inhomogeneous universe. From this, we will obtain a coordinate transformation map between the observation and the true coordinate frames. Through this, we shall understand how the cosmological observation is affected by the inhomogeneity of the universe. Part 2. Investigation of the galaxy number density and the luminosity distance fluctuation in an inhomogeneous universe. From the coordinate transformation map in the Part 1, we will derive the galaxy number density and the luminosity distance in the observation coordinate and discuss the ultimate goal. In addition, we will study the gauge-invariance and the consistency with the equivalence principle of the cosmological observables. Organizers Seoktae Koh(Jeju National University) Kyungjin Ahn(Chosun University) Chan-Gyung Park(Chonbuk National University) Jinn-Ouk Gong(APCTP) Seok-Cheon Lee(KIAS) Ki-Young Choi(Chonnam National University) Contact kiyoungchoi@jnu.ac.kr Sponsor  |
|||