An Overview of Gaia - Data Intensive Astronomy - 물리천문학부 천문학전공

Colloquium

Astronomy Colloquium (2015 Fall Semester)

* Date: 11. 19.
* Speaker: Dr. Dae-Won Kim (ASIAA)
* Title: An Overview of Gaia – Data Intensive Astronomy
* Abstract

Gaia is an ESA satellite project launched at Dec. 2013. It will map our Galaxy in 3D by measuring six astrometric parameters (i.e. two positions, two proper motions, parallax, and radial velocity) of one billion stars over the whole sky. Astrometric accuracy of Gaia for G type star is 5-16 μas for bright stars, 24 μas at V = 15 mag and 540 μas at V = 20 mag, which is the highest accuracy that has ever been achieved. Gaia simultaneously obtains low-resolution spectrum of each star using Blue and Red Photometer (BP and RP: 330-680nm and 640-1000nm, respectively). By the nature of Gaia, it will produce enormous amount of complex data. Analyzing Gaia data is thus a challenging and huge task requiring big-data experts and dedicated computing powers as well. In this talk, I will give an overview of the Gaia mission and efforts for Gaia data analysis in DPAC (Data Processing and Analysis Consortium).

Date	Speaker	Title	Remarks
9. 3.	Dr. Yun-Kyeong Sheen (Univ. Concepcion)	Recent galaxy mergers and residual star formation of red sequence galaxies in galaxy clusters
9. 10.	Prof. Norbert Langer (Univ. Bonn)	Stars at the Eddington limit
9. 17.	Dr. Youngmin JeangAhn (University of Arizona)	Orbital distribution of asteroids on the inner solar system and their impact fluxes on the Earth, the Moon and Mars
9. 24.	Dr. Encarni Romero Colmenero / Dr. Steven Crawford (SALT)	1. The South African Astronomical Observatory Encarni Romero Colmenero (SAAO/SALT) 2. Transformation of Star-bursting Galaxies in Galaxy Clusters
10. 1.	Dr. Eunhyeuk Kim (Korea Aerospace Research Institute)	Introduction to Korean Lunar Missions	Speech in Korean
10. 8	Prof. Changbom Park (KIAS)	고천문학(Historical Astronomy)의 세계와 의의	Speech in Korean
10. 15.		한국천문학회
10. 22.	Dr. Woong-Seob Jeong (KASI)	Near-Infrared Imaging Spectroscopic Survey in Space
10. 29.	Dr. Raphael Gobat (KIAS)	Galaxy evolution in dense environments at z~2
11. 5.	Dr. Luc Dessart (Observatoire de la Cote d’Azur)	A massive star life: from main sequence to explosion and supernova
11. 12.	Dr. Edmund Hodges-Kluck (Univ. Michigan)	Recent Developments in Gaseous Galaxy Halos
11. 19.	Dr. Dae-Won Kim (ASIAA)	An Overview of Gaia – Data Intensive Astronomy
11. 26.	Dr. Emanuele Daddi (CEA Saclay)	Insights into the crucial phases of cluster formation at high redshifts
12. 3.		No Colloquium
12. 10.	홍승수 명예교수 (서울대학교 물리천문학부)	융합적 사유를 위한 사실에서 진실 찾기	Speech in Korean
12. 22.	Dr. Tali Palma (Pontificia Universidad Catolica de Chile)	Variable stars in the VVV Survey	Special Seminar

2015 Fall semester detail