New constraints on the black hole spin in radio-loud quasars

Colloquium Astronomy Colloquium (2017 Spring Semester) * Date May 30 * Speaker Andreas Schulze (NAOJ) * Title New constraints on the black hole spin in radio-loud quasars * Abstract     One of the major unsolved questions on the understanding of the AGN population is the origin of the dichotomy between radio-quiet and radio-loud quasars. […]

Testing the statistical isotropy using dipolar modulation in galaxy number counts

Colloquium Astronomy Colloquium (2017 Spring Semester) * Date Jun 01 * Speaker Mijin Yoon (Yonsei University) * Title Testing the statistical isotropy using dipolar modulation in galaxy number counts * Abstract     For the last two decades, we have seen a huge development of modern cosmology based on observations such as the cosmic microwave […]

Exploring the variability of the flat spectrum radio source 1633+382

Colloquium Astronomy Colloquium (2017 Spring Semester) * Date Jun 08 * Speaker Juan Carlos Algaba Marcos (KASI) * Title Exploring the variability of the flat spectrum radio source 1633+382 * Abstract     We present multi-frequency simultaneous VLBI radio observations of the flat spectrum radio quasar 1633+382 (4C 38.41) as part of the interferometric monitoring […]

Asteroid-Meteorite Reflectance Spectroscopy, Space Weathering, and Hayabusa Missions

Colloquium Astronomy Colloquium (2017 Spring Semester) * Date Jun 16 * Speaker Takahiro Hiroi (Brown University) * Title Asteroid-Meteorite Reflectance Spectroscopy, Space Weathering, and Hayabusa Missions * Abstract     Asteroids, along with comets, are believed to be the remnant of the planetesimals and retain information of the distribution and evolution of solid materials of […]

PAH emission in protoplanetary disks

Colloquium Astronomy Colloquium (2017 Fall Semester) * Date Sep 07 * Speaker Ji-Yeon Seok (NAOC China) * Title PAH emission in protoplanetary disks * Abstract     In protoplanetary disks (PPDs) where new planets might form, a distinct set of broad emission features at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 micron, is often detected, […]

The Total Solar Eclipse in 2017

Colloquium Astronomy Colloquium (2017 Fall Semester) * Date Sep 14 * Speaker Jeongwoo Lee (Astronomy program, SNU) * Title The Total Solar Eclipse in 2017 * Abstract    On August 21, 2017, a total solar eclipse made its way through the North American Continent and millions of people, including hundreds of visitors from Korea, looked […]

Spectroscopic Observation with NYSC 1 m Telescope

Colloquium Astronomy Colloquium (2017 Fall Semester) * Date Sep 21 * Speaker Sang Gak Lee (College of Natural Sciences, SNU) * Title Spectroscopic Observation with NYSC 1 m Telescope * Abstract     The youth activities, some facilities at National Youth Space Center (NYSC) with its goal will be briefly introduced. The observing conditions at […]

Tests of fifth forces using large-scale structure

Colloquium Astronomy Colloquium (2017 Fall Semester) * Date Sep 28 * Speaker David Parkinson (KASI) * Title Tests of fifth forces using large-scale structure * Abstract   The apparent acceleration of the expansion of the Universe currently has no satisfactory explanation from theory. Beyond the simple cosmological constant, proposed theoretical models involve some extra degree […]

VVV Survey and Milky Way Globular Clusters

Colloquium Astronomy Colloquium (2017 Fall Semester) * Date Oct 17 * Speaker Tali Palma (UAB Santiago, Chile) * Title VVV Survey and Milky Way Globular Clusters * Abstract   The “VISTA variables in the Vía Láctea” (VVV) Survey is an ESO Public NIR time-domain survey of the inner Milky Way, which mapped the Galactic bulge […]