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IDENTIFICATION CODE OF INTERSTELLAR CLOUDS WITHIN IRAF
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  • IDENTIFICATION CODE OF INTERSTELLAR CLOUDS WITHIN IRAF
  • IDENTIFICATION CODE OF INTERSTELLAR CLOUDS WITHIN IRAF
저자명
Lee. Young-Ung,Jung. Jae-Hoon,Kim. Hyun-Goo
간행물명
천문학논총
권/호정보
1997년|12권 1호|pp.185-196 (12 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

We present a code which identifies individual clouds in crowded region using IMFORT interface within Image Reduction and Analysis Facility (IRAF). We define a cloud as an object composed of all pixels in longitude, latitude, and velocity that are simply connected and that lie above some threshold temperature. The code searches the whole pixels of the data cube in efficient way to isolate individual clouds. Along with identification of clouds it is designed to estimate their mean values of longitudes, latitudes, and velocities. In addition, a function of generating individual images (or cube data) of identified clouds is added up. We also present identified individual clouds using a $^{12}CO$ survey data cube of Galactic Anticenter Region (Lee et al. 1997) as a test example. We used a threshold temperature of $5sigma$ rms noise level of the data With a higher threshold temperature, we isolated subclouds of a huge cloud identified originally. As the most important parameter to identify clouds is the threshold value, its effect to the size and velocity dispersion is discussed rigorously.