NGC 1300 - SB(s)b

NGC 1300

De Vaucouleurs Atlas Type: SB(s)b

Filter: B

Telescope: UH 2.2-m
North up , East left
Field Dimensions: 7.3 x 6.9 arcminutes

RC3 Type: SB(rs)bc
RSA Type: SBb(s)I.2
Surface Brightness Range Displayed: 17.5-26.0 mag per square arcsec
Absolute Blue Magnitude: -20.6
Elmegreen Spiral Arm Class: AC12

De Vaucouleurs Atlas Description:

NGC 1300 has a strong bar and high contrast spiral arms that break from the bar ends; it can be considered the prototype of the SB(s)b class (Sandage 1961). Although not evident in the atlas image, the two main arms form a weak outer pseudoring (Elmegreen et al. 1996). The color index map shows how star formation is enhanced near the ends of the bar in NGC 1300 . This characteristic, fairly typical of the class, was interpreted by Roberts, Huntley, and van Albada (1979) as due to ``shock focussing", where gas flowing outward and gas flowing inward converge around the bar ends. Indeed, shocks must be strong in NGC 1300 because the bar shows very linear leading dust lanes. These lanes curve around the center, where a small star-forming nuclear ring is found.