NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-23 T14:49:00 PDT
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For refcode 2014A&A...566A..71L:
Retrieve 18 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2014A&A...566A..71L Dynamics of starbursting dwarf galaxies. III. A H I study of 18 nearby objects Lelli, Federico; Verheijen, Marc; Fraternali, Filippo Abstract. We investigate the dynamics of starbursting dwarf galaxies, using both new and archival H I observations. We consider 18 nearby galaxies that have been resolved into single stars by HST observations, providing their star formation history and total stellar mass. We find that 9 objects have a regularly rotating H I disk, 7 have a kinematically disturbed H I disk, and 2 show unsettled H I distributions. Two galaxies (NGC 5253 and UGC 6456) show a velocity gradient along the minor axis of the H I disk, which we interpret as strong radial motions. For galaxies with a regularly rotating disk we derive rotation curves, while for galaxies with a kinematically disturbed disk, we estimate the rotation velocities in their outer parts. We derive baryonic fractions within about 3 optical scale lengths and find that, on average, baryons constitute at least 30% of the total mass. Despite the star formation having injected ~10^56^ ergs in the ISM in the past ~500 Myr, these starbursting dwarfs have both baryonic and gas fractions similar to those of typical dwarf irregulars, suggesting that they did not eject a large amount of gas out of their potential wells. Appendices are available in electronic form at http://www.aanda.orgH I datacubes (FITS files) are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/566/A71 Key words: galaxies: dwarf, galaxies: starburst, galaxies: kinematics and dynamics, galaxies: evolution, dark matter
Retrieve 18 NED objects in this reference.
Please click here for ADS abstract

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