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Selection of High Redshift Quasars with Infrared Medium-deep Survey
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  • Selection of High Redshift Quasars with Infrared Medium-deep Survey
  • Selection of High Redshift Quasars with Infrared Medium-deep Survey
저자명
전이슬,임명신,박원기,김지훈,전현성,최창수,Jeon. Yi-Seul,Im. Myung-Shin,Park. Won-Kee,Kim. Ji-Hoon,Jun. Hyun-Sung,Choi. Chang-Su
간행물명
천문학회보
권/호정보
2010년|35권 1호|pp.77-77 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

A high redshift quasar is useful to investigate the early part of our universe. Since they are one of the brightest objects in the early universe, they can provide us with clues of the growth of super massive black holes and the early metal enrichment history. To discover the high redshift quasars, we designed a survey of wide area and moderate depth; Infrared Medium-deep Survey (IMS), a J-band imaging survey of ~200 $deg^2$ area where the multi-wavelength data sets exist. To obtain the J-band data, we are using the United Kingdom Infra-Red Telescope (UKIRT), and so far we have covered ~20 $deg^2$ with Y- or J-bands over three observing runs during 2009. We used color-color diagrams of multi-wavelength bands including i, z, Y, J, K, $3.6{mu}m$ and $4.5{mu}m$ to select high redshift quasars. The major challenge in the selection is many M/L/T dwarfs, low redshift galaxies, and instrumental defects that can be mistaken as a high redshift quasar. We describe how such contaminating sources can be excluded by adopting multiple color-color diagrams and eye-ball inspections. So far, our selection reveals two quasar candidates at z~7.