The warped Spindle NGC 2685

Details The warped Spindle NGC 2685 The warped Spindle NGC 2685

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004bdmh.confe.108j&link_type=abstract

"Proceedings of "Baryons in Dark Matter Halos". Novigrad, Croatia, 5-9 Oct 2004. Editors: R. Dettmar, U. Klein, P. Salucci. Publ

Physics

Scientific paper

We present HI- and optical (i -band) data of the well known “Spindle” galaxy NGC 2685, along with our tilted-ring analysis of the obtained HI data cubes. The optical appearance of the galaxy on the sky suggests that this galaxy is a classical polar-ring galaxy with an additional outer HI-ring perpendicular to the inner one. Our observations show that this is not the case. While it is true that the orbits of the gas change their orientations substantially towards larger radii, the HI does not form two distinct rings but rather a coherent structure, an extreme warp with an extremely high degree of symmetry. The optical appearance of NGC 2685 resembles the total HI intensity to great detail so that it is likely that an extreme warp is also present in an extended stellar disk.

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