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Confinement of interstellar dust in galactic bars

Author/s: A. Zurita, M. Relaño, J. E. Beckman y J. H. Knapen

Reference: A&A 413, 73–89 (2004)| PDF

Images of the bar of galaxy NGC 1530 obtained using the TAURUS instrument at the WIlliam Herschel telescope at the Observatorio del Roque de los Muchachos
Images of the bar of galaxy NGC 1530 obtained using the TAURUS instrument at the WIlliam Herschel telescope at the Observatorio del Roque de los Muchachos

Tests have been carried out for the first time on the hypothesis that the structure of interstellar dust around galactic bars is determined by the velocity field of the gas. The dust is found in regions delineated by high gas speed gradients, something which had been proposed but not observed. The gradients themselves seem to be related to intense star-forming regions.

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