Dept. of Astronmy Wide Field Surveys and Astronomical Discovery Space A. Lawrence / Astro-ph: Byeon Jae Gyu

Dept. of Astronmy Why are wide field surveys important? Historically, surveys have been the main engine of discovery for astronomy. Measurement of cosmological parameters Structure of the Milky Way Substellar objects Large scale structure

Dept. of Astronmy Major Surveys – 2MASS The Two Micron All Sky Survey : 2MASS Started in June 1997 and completed in February Two dedicated 1.3m telescope, in Mt Hopkin and CTIO Three-channel camera / 256 Ⅹ 256HgCdTe array. Catalogue depth is J=16, H=15, K s =14.7 First real sky survey at near infa-red wavelengths Milky Way, High redshift objects, Cooler objects IPAC( UMASS(

Dept. of Astronmy Major Surveys – SDSS The Sloan Digital Sky Survey : SDSS 2.5m telescope, Apache Point 30 CCDs on the camera / 1.5 square degrees The spectroscopic survey of objects selected from the imaging survey/ using a 600-fibre system 200 million objects, and spectra for a million galaxies…… An extended programme, called SDSS-II, has commenced Further information(

Dept. of Astronmy Major Surveys – UKIDSS The UKIRT Infrared Deep Sky Survey : UKIDSS UK Infrared Telescope(UKIRT) + Wide Field Camera(WFCAM) Field of view of 0.21 sq.deg / Many times deeper than 2mass Half the UKIRT time over The aim of UKIDSS Measure the substellar mass function Its dependence on metallicity To find quasars at z=7 Discover Population II brown dwarf To measure galaxy clustering at z=1 and z=3

Dept. of Astronmy 2MRS/6dFGRS; 2dFGRS and SDSS-z Systematic redshift survey based on galaxy catalogues from imaging surveys Redshift surveys : 2MRS and 6dFGRS / 2dFGRS and SDSS-z Very sucessful projects In the Northern sky, is SDSS-z In the Southern sky, is the 2dF Galaxy Redshift Survey Power spectrum of galaxy clustering / Supernova programme results / The cosmological parameters.

Dept. of Astronmy Next step - VISTA Visible and Infrared Survey Telescope for Astronomy : VISTA 4m telescope, on Paranal in chile / ESO telescope 16 arrarys, 2048 X 2048 CCD, covering 0.6sq.deg / Z, Y, J, H, Ks VISTA therefore operates in the same parameter space as UKIDSS VISTA web page (

Dept. of Astronmy Next step - PanSTARRS Panoramic Survey Telescope and Rapid Respone System : PanSTARRS A University of Hawaii project Four 1.8m telescopes each with a mosaic array of 64 X 64 CCD chips, covering 7 sq.deg The prime aim of PanSTARRS is to detect hazardous NEOs. Stellar transit, microlensing studies, locating distant supernovae, dark energy problem Many times deeper than SDSS PanSTARRS web page

Dept. of Astronmy Next step - WISE The Wide Field Infrared Survey Explorer : WISE NASA MIDEX mission scheduled for launch in 2009 Will fill the gap between UKIDSS/VISTA in the near-IR and IRAS/Akari in the far-IR For bands (3.3, 4.7, 12, 23μm) / 3 and 5 μm is new territory Short life time – 7 months / mid-infrared survey Very coolest brown dwarfs, protoplanetary discs, solar system bodies, and obscured quasars. WISE web page (

Dept. of Astronmy Next step - LSST The Large synoptic Survey Telescope : LSST Cerro Pachon in Chile 8.4m telescope, 10sq.deg field of view Aiming at the same kind of PanSTARRS 15TB of imaging data every night 60TFlops of processing power LSST 협력체 : NOAO, AURA, UofA, UofW etc ~100 과학기술 자

Dept. of Astronmy 終端天文學 하늘끝 천문학 Edge Astronomy 우주의 끝, 은하의 끝, 태양계의 끝 우주의 끝 우주거시구조연구 / 우주경계영역 특성연구 High Redshift QSO/AGN 연구 중력렌즈탐사 / 암흑에너지와 암흑물질연구 은하의 끝 우리은하 경계영역 항성 / 개스분포 연구 헤일로와 원반외곽부 역학 / 화학 연구 근거리 외부은하 경계영역 연구 태양계의 끝 명왕성 외곽지역 물질분포연구 외부행성계 탐색 및 형성연구