Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/736
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dc.contributor.authorBegum, A-
dc.contributor.authorChengalur, J. N-
dc.date.accessioned2006-03-13T09:58:56Z-
dc.date.available2006-03-13T09:58:56Z-
dc.date.issued2004-09-
dc.identifier.citationBASI, Vol. 32, No. 3, pp. 231-238en
dc.identifier.urihttp://hdl.handle.net/2248/736-
dc.description.abstractWe present results of deep, high velocity resolution (~1.6 km s-1) Giant Metrewave Radio Telescope (GMRT) HI 21 cm-line observations of a sample of extremely faint (MB > -12.5) dwarf irregular galaxies. unlike previous studies, we find large-scale velocity gradients in even the faintest galaxies of our sample i.e. their velocity fields are not "chaotic". For some of our sample galaxies, where the velocity fields are in fact completely consistent with ordered rotation, we derive rotation curves and determine the structure of the dark matter halos of the galaxies from mass modelling, using the asymmetric drift corrected rotation velocities. Finally, we compile from literature a sample of galaxies with known dark matter distribution, estimated from HI synthesis observations, and discuss the results and their implications for hierarchical galaxy formation modelsen
dc.format.extent312464 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAstronomical Society of Indiaen
dc.subjectgalaxiesen
dc.subjectdwarf galaxiesen
dc.subjectkinematics and dynamics galaxiesen
dc.subjectindividual (Camelopardalis B, DDO210).en
dc.titleGMRT study of extremely faint dwarf irregular galaxiesen
dc.typeArticleen
Appears in Collections:BASI Publications

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