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Paper: High Resolution HI Observations of the Very Metal-Poor System SBS 0335–052
Volume: 407, The Low-Frequency Radio Universe
Page: 95
Authors: Ekta, B.; Chengalur, J.N.; Pustilnik, S.
Abstract: We present Giant Metrewave Radio Telescope (GMRT) HΙ 21 cm observations of two of the most metal deficient galaxies known, viz., SBS 0335-052E and W. They form a strongly interacting pair of galaxies. We present their HΙ maps at various angular resolutions. A diffuse HΙ bridge and extended tidal tails dominate the HΙ morphology and kinematics at low resolutions. Higher resolution maps show that even inner disks of both galaxies are disturbed. The large-scale velocity field is dominated by the gradient along the tidal tails. At high resolutions however, one can see a velocity gradient along the disk of SBS 0335-052W which traces the original rotational motion of the disk. HST images of SBS 0335-052E show an ionized superbubble expanding to north-west of its central super star clusters. The extensions of HΙ, in the region of superbubble, are aligned in the same direction. There is higher column density HΙ gas on the south-east edge of superbubble. The superbubble is expanding into a region of relatively low HΙ column density, produced by the ongoing tidal interaction.
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