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Session 82 - Spirals & Irregulars.
Display session, Friday, January 09
We present high resolution (7 arcsec), high sensitivity HI images of the shell galaxy NGC 1210. The neutral hydrogen forms a continous loop which appears in projection as an off-centered ring. Some remarkable aspects are the large HI mass, ( 8 \times 10^9 M_ødot), the sharpness of some of its features (< 3 kpc) and its unsettled appearance. Optically NGC 1210 shows a variety of shell morphologies, all-around shells in the center and aligned shells in the outer parts in addition to something that looks like a tidal tail. The present-day peculiarities of NGC 1210 may be the result of a major merger or multiple merger/accretion events. Using the HI kinematics and the gas and shell morphology we try to disentangle the recent past of NGC 1210.
Program listing for Friday