내용
사진
사진 업로드
DSS Images Other Images
관련 글
General study of group membership. II - Determination of nearby groups
We present a whole sky catalog of nearby groups of galaxies taken fromthe Lyon-Meudon Extragalactic Database. From the 78,000 objects in thedatabase, we extracted a sample of 6392 galaxies, complete up to thelimiting apparent magnitude B0 = 14.0. Moreover, in order to considersolely the galaxies of the local universe, all the selected galaxieshave a known recession velocity smaller than 5500 km/s. Two methods wereused in group construction: a Huchra-Geller (1982) derived percolationmethod and a Tully (1980) derived hierarchical method. Each method gaveus one catalog. These were then compared and synthesized to obtain asingle catalog containing the most reliable groups. There are 485 groupsof a least three members in the final catalog.
| New H I observations for some edge-on spiral galaxies
We present new H I observations made at the Nancay radiotelescope for 53previously undetected galaxies. For each of the 47 detected objects wegive the heliocentric H I velocity, H I linewidths at 20 percent and 50percent of the maximum intensity, and the H I flux. These galaxies havebeen included in a sample built for the study of group membership.
| New H I observations for some edge-on spiral galaxies
We present new H I-observations made at the Nancay radiotelescope for 53previously undetected galaxies. For each of the 47 detected objects wegive the heliocentric H I-velocity, H I-linewidths at 20 percent and 50percent of the maximum intensity and the H I-flux. These galaxies havebeen included in a sample built for the study of group membership.
|
새 글 등록
관련 링크
새 링크 등록
다음 그룹에 속해있음:
|
관측 및 측정 데이터
천체목록:
|
