Садржај
Слике
Уплоадјуј своје слике
DSS Images Other Images
Везани чланци
The Catalog of Southern Ringed Galaxies
The Catalog of Southern Ringed Galaxies (CSRG) is a comprehensivecompilation of diameters, axis ratios, relative bar position angles, andmorphologies of inner and outer rings, pseudorings, and lenses in 3692galaxies south of declination -17 deg. The purpose of the catalog is toevaluate the idea that these ring phenomena are related to orbitalresonances with a bar or oval in galaxy potentials. The catalog is basedon visual inspection of most of the 606 fields of the Science ResearchCouncil (SRC) IIIa-J southern sky survey, with the ESO-B, ESO-R, andPalomar Sky surveys used as auxiliaries when needed for overexposed coreregions. The catalog is most complete for SRC fields 1-303 (mostly southof declination -42 deg). In addition to ringed galaxies, a list of 859mostly nonringed galaxies intended for comparison with other catalogs isprovided. Other findings from the CSRG that are not based on statisticsare the identification of intrinsic bar/ring misalignment; bars whichunderfill inner rings; dimpling of R'1pseudorings; pointy, rectangular, or hexagonal inner or outer ringshapes; a peculiar polar-ring-related system; and other extreme examplesof spiral structure and ring morphology.
| The Horologium-Reticulum supercluster of galaxies
The existence of a supercluster at approximately 18,000 km/s in theHorologium-Reticulum region is demonstrated. The principal constituentsof the H-R supercluster are two rich clusters, Cl 0342-538 and 0329-527,one of which has an adjacent loose enhancement of galaxies, Cl 0326-537.A simple model indicates that the two main clusters of the H-Rsupercluster are at present approaching each other and will collidewithin 0.5 of a Hubble time. It is noted that a bridge (or filament) ofgalaxies connects Cl 0342-538 to the loose enhancements at Cl 0326-537.It is found that the position angles of the five bridge galaxies aresignificantly aligned along the direction of the bridge. A number offoreground groups are detected. One such system at 13,700 km/s coversmost of the survey region, exhibits a velocity dispersion of only 210km/s, and is similar to the G47 system observed in front of the Herculessupercluster. Several regions completely devoid of galaxies areidentified.
| A catalog of morphological types in 55 rich clusters of galaxies
Data are presented from a study of 55 rich clusters of galaxies. Thedata include positions, morphological types, estimated total magnitudes,bulge sizes, and ellipticities for about 6000 galaxies, as determinedfrom high scale photographic plates. Data reduction procedures aredescribed, and a brief analysis of cluster richness, which indicatesthat Abell richness classes are only rough indicators of total clustermembership, is included.
| New nebulae and nebulous stars.
Not Available
|
Додај нови чланак
Линкови у сродству са темом
Додај нови линк
Чланови следећих група \:
|
Посматрања и Астрометриски подаци
Каталог и designations:
|
