Polar Ring Galaxies and the Tully-Fisher relation

Enrica Iodice (INAF; Francoise Combes (LERMA; Frederick Bournaud (LERMA; Linda S. Sparke (Dept. of Astronomy; Magda Arnaboldi (INAF; Massimo Capaccioli (INAF; Observatory of Paris); Obs. of Capodimonte); Obs. of Paris); Obs. of Turin)

arxiv: astro-ph/0310139 · v1 · submitted 2003-10-06 · 🌌 astro-ph

Polar Ring Galaxies and the Tully-Fisher relation

Magda Arnaboldi (INAF , Obs. of Turin) , Enrica Iodice (INAF , Obs. of Capodimonte) , Frederick Bournaud (LERMA , Obs. of Paris) , Francoise Combes (LERMA , Linda S. Sparke (Dept. of Astronomy

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Univ. of Wisconsin) Wim van Driel (GEPI Observatory of Paris) Massimo Capaccioli (INAF

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classification 🌌 astro-ph

keywords polarlargerprgsringdatagalaxieshaloobjects

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We have investigated the Tully-Fisher relation for Polar Ring Galaxies (PRGs), based on near infrared, optical and HI data available for a sample of these peculiar objects. Many PRGs show larger HI line-widths than expected for the observed K band luminosity, and this result is confirmed by a larger sample of objects, based on B-band data. This observational evidence may be related to the dark halo shape and orientation in these systems: the larger rotation velocities observed in PRGs can be explained by a flattened polar halo, aligned with the polar ring.

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Polar Ring Galaxies and the Tully-Fisher relation

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