Оглавление
Изображения
Загрузить ваше изображение
DSS Images Other Images
Публикации по объекту
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.
| Photometry of luminous spiral galaxies in the direction of the Great Attractor
This paper presents photoelectric multiaperture BVI magnitudes for ahomogeneous sample of luminous spirals in the direction of the GreatAttractor. The total magnitudes B(T) and the mean colors (B - V) and (B- I) were determined for each galaxy and analyzed. The (B - I) colorchanges linearly with csc b over the range 3-10 and has a slope of 0.071mag. The A super bB values calculated from B - I agrees wellwith the A super bB values derived following the precepts ofBurstein and Heiles (1978). The (B - I) super b values show a slope of0.47 with log R. The corrected absolute magnitudes M superb,i,zB of spirals show little variation with luminosityclasses I, I-II, and II and have a dispersion of 0.85 mag. The samplewith well determined luminosities exhibits a uniform distribution overlog v up to v about 10,000 km/s. There is an indication that aselection-bias favoring higher luminosity galaxies sets in for spiralgalaxies with v greater than 10,000 km/s. The spirals with v less than10,000 km/s place a limit of about 500 km/s on peculiar velocities in ornear the Great Attractor.
| Redshifts of luminous spiral galaxies in the direction of the Great Attractor
The spatial distribution of a homogeneous samples of luminous spirals inthe direction of the 'Great Attractor' is studied. New radial velocitiesand published data yield redshifts for 94 percent of the sample. Thepresent survey, which does not include the cores of the Hydra andCentaurus clusters, shows no evidence for a major excess of velocitiesat or near the redshift of the Great Attractor. Luminous spirals withredshifts in the range 2000-4000 km/s are mainly distributed in a smallnumber of groups or clumps, whereas the spirals with redshifts in therange 4000-7000 km/s mostly appear to exhibit a rather smooth spatialdistribution.
| A survey of high-luminosity spirals in the direction of the great attractor
Luminosity-classification techniques have been used to study galaxies in33 SRC Schmidt fields centered on the position of 'The Great Attractor'.A catalog and finding charts are given for 191 spiral galaxies, whichare probably of DDO luminosity classes I, I-II, or II. Radial velocitiesof these objects should provide considerable insight into thethree-dimensional structure of this region of space. The surfacedistribution of galaxies in the survey area is seen to be stronglyaffected by Galactic absorption. It is therefore not clear if anysignificance should be attached to the observation that there is noobvious concentration of galaxies at, or near, the position of The GreatAttractor.
| Southern Galaxy Catalogue.
Not Available
|
Добавить новую статью
Внешние ссылки
- - Внешних ссылок не найдено -
Добавить внешнюю ссылку
Группы:
|
Наблюдательные данные и астрометрия
Каталоги и обозначения:
|
