Department of Astronomy, Yonsei University 연세대학교 천문우주학과
Ia형 초신성의 조기형 모은하. II. 초신성 우주론에 내재된 광도 진화 효과의 증거
The most direct and strongest evidence for the presence of dark energy is provided by the measurement of
galaxy distances using SNe Ia. This result is based on the assumption that the corrected brightness of SN Ia
through the empirical standardization would not evolve with look-back time. [read more]
초신성 우주론에 내재된 중대한 광도 진화 효과의 추가 증거
Supernova (SN) cosmology us based on the assumption that the corrected luminosity of SN Ia would not evolve with redshift.
Recently, our age dating of steelar populations in early-type host galaxies (ETGs) from high-quality spectra has shown that this key assumption is most likely in error. [read more]
CANYVAL-C (CubeSat Astronomy NASA and Yonsei using Virtual ALignment for Coronagraph) mission It is a technology demonstration mission that shows the concept of a virtual space telescope for solar science mission by using two CubeSats. This mission is aimed to take images of solar corona via formation flying. To accomplish the goal of this mission, two CubeSat systems and the ground station have been developed. The two CubeSats will be launched in early 2020.
A115 은하단에 대한 다파장 연구 A115 is a merging galaxy cluster at z ∼ 0.2 with a number of remarkable features, including a giant (∼2.5 Mpc)radio relic, two asymmetric X-ray peaks with trailing tails, and a peculiar line-of-sight velocity structure. We present a multiwavelength study of A115 using optical imaging data from Subaru, X-ray data from Chandra, and spectroscopic data from the Keck/DEIMOS and MMT/Hectospec instruments. [read more]