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20 April 2024 |
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Polar Ring Galaxies and the Tully-Fisher relation | | Magda Arnaboldi
; Enrica Iodice
; Frederick Bournaud
; Francoise Combes
; Linda S. Sparke
; Wim van Driel
; Massimo Capaccioli
; | | Date: |
6 Oct 2003 | | Subject: | astro-ph | | Affiliation: | INAF, Obs. of Turin), Enrica Iodice (INAF, Obs. of Capodimonte), Frederick Bournaud (LERMA, Obs. of Paris), Francoise Combes (LERMA, Obs. of Paris), Linda S. Sparke (Dept. of Astronomy, Univ. of Wisconsin), Wim van Driel (GEPI, Observatory of Paris), M | | Abstract: | 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. | | Source: | arXiv, astro-ph/0310139 | | Services: | Forum | Review | PDF | Favorites | |
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