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        HI Observations of Early-Type Galaxies

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        901628.pdf (PDF, 597Kb)
        Author
        del Rio, M.S.
        Brinks, E.
        Carral, P.
        Cepa, J.
        Attention
        2299/1501
        Abstract
        We present high resolution (15") HI observations of the S0 galaxy NGC 404. We derive an HI mass of MHi = 6.7 x 10???, in good agreement with previous measurements. The HI is distributed in a broad annulus (a doughnut) and extends out to a diameter of 9', well beyond the optical diameter of 6'. The velocity field is regular and shows, surprisingly, a declining rotation curve. This decline is purely Keplerian, strongly suggesting that all the mass is contained within the inner 200".
        Publication date
        1999
        Published in
        In: Procs of Star Formation in Early Type Galaxies, ASP Conference Series 163
        Other links
        http://hdl.handle.net/2299/1501
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