NGC 7741 - (R2')SB(s)cd

NGC 7741

De Vaucouleurs Atlas Type: (R2')SB(s)cd

Filter: g

Telescope: Pal 1.5-m
North left , East down
Field Dimensions: 5.2 x 3.9 arcminutes

RC3 Type: SB(s)cd
RSA Type: SBc(s)II.2
Surface Brightness Range Displayed: 19.5-26.0 mag per square arcsec
Absolute Blue Magnitude: -19.1
Elmegreen Spiral Arm Class: AC 5

De Vaucouleurs Atlas Description:

This galaxy can be considered a prototype of SB(s)cd. The bar is very well-defined and includes considerable asymmetry and some dust. The two main arms break perpendicularly from the bar, and although relatively ill-defined, these arms form an (R2') pseudoring in the outer disk. This is one of the latest types showing this kind of morphology. No nucleus is seen in blue light. The approximate B-V color index map shows considerable recent star formation in the bar, and a broad, off-centered dust patch dividing the bar. De Vaucouleurs and Freeman (1973) considered the dividing dust-patch morphology characteristic of the most late-type barred spirals , such as those of the Magellanic type. The presence of active star formation in the bar is generally found mainly in late Hubble types (Martin and Friedli 1997).